Velocity

Velocity (pronounced vuh-los-i-tee)

(1) Rapidity of motion or operation; swiftness; a certain measurement of speed.

(2) In mechanics and physics, a measure of the rate of motion of a body expressed as the rate of change of its position in a particular direction with time.  It is measured in metres per second, miles per hour etc.

(3) In casual, non technical use, a synonym for speed.

1540-1550: From the Middle French vélocité, from the Latin velocitatem (nominative vēlōcitās) (swiftness; speed), from vēlōx (genitive velocis) (swift, speedy, rapid, quick) of uncertain origin.  It may be related either to volō (I fly), volāre (to fly) or vehere (carry) from the primitive Indo-European weǵh- (to go, move, transport in a vehicle) although some etymologists prefer a link with the Proto-Italic weksloks from the primitive Indo-European weg-slo-, a suffixed form of the root weg- (to be strong, be lively). Although in casual use, velocity and speed are often used interchangeably, their meanings differ.  Speed is a scalar quantity referring to how fast an object is moving; the rate at which an object covers distance.  Velocity is the rate at which an object changes position in a certain direction. It is calculated by the displacement of space per a unit of time in a certain direction. Velocity deals with direction, while speed does not.  In summary, velocity is speed with a direction, while speed does not have a direction.  Velocity is a noun; the noun plural is velocities.

Great moments in velocity stacks

Velocity stacks (also informally known as trumpets or air horns) are trumpet-shaped devices, sometimes of differing lengths, fitted to the air entry of an engine's induction system, feeding carburetors or fuel injection.  Velocity stacks permit a smooth and even flow of air into the intake tract at high velocities with the air-stream adhering to the pipe walls, a process known as laminar flow.  They allow engineers to modify the dynamic tuning range of the intake tract by functioning as a resonating pipe which can adjust the frequency of pressure pulses based on its length within the tract.  Depending on the length and shape of the stack, the flow can be optimized for the desired power and torque characteristics, thus their popularity in competition where the quest is often for top-end power but the flow can also be tuned instead to produce enhanced low or mid-range performance for specialized use.

1973 McLaren M20C.

The 1968 McLaren M8A was built for the Canadian-American Challenge Cup (the Can-Am) and used a new aluminum version (later sold for street use as the ZL1) of the 427 cubic inch (7.0 litre) big-block Chevrolet V8.  Dry sumped and fuel injected, it was rated at 625 bhp.  A series for unlimited displacement sports cars, the wonderful thing about the Can-Am was the brevity of the rules which essentially were limited to (1) enclosed body work and (2) two seats (one of which was close to a fake).  With engines eventually growing to 509 cubic inches (8.3 litres) and reaching close to 800 horsepower, the McLarens dominated the series for five years, their era ended only by the arrival of the turbo-panzers, the turbocharged Porsche 917s which in qualifying trim generated a reputed 1500 horsepower.  The McLarens remained competitive however, the final race of the 1974 series won by a McLaren  M20.    

1970 Ferrari 512S.

Ferrari built 25 512S models in 1969-1970 to comply with the FIA’s homologation rules as a Group 5 sports car to contest the 1970 International Championship for Makes.  It used a five-litre V12 and was later modified to become the 512M which, other than modified road cars, was the last Ferrari of the post-war era built for sports car racing, the factory instead focusing on Formula One.  Not until 2023 would Ferrari return to the Sports Car circuits, celebrated with victory in the Le Mans 24 hour endurance classic, the marque's first since winning with a 250 LM in 1965.  

1965 Coventry Climax FWMW flat-16 prototype.

Coventry Climax developed their FWMW between 1963-1965, intending it for use in Formula One.  A 1.5 litre flat-16, both the Brabham and Lotus teams designed cars for this engine but it was never raced and the engines never proceeded beyond the prototype stage.  Like many of the exotic and elaborate designs to which engineers of the era were attracted, the disadvantages imposed by the sheer bulk and internal friction were never overcome and the promised power increases existed in such a narrow power band it’s usefulness in competition was negligible.  Even on the test-benches it was troublesome, the torsional vibrations of the long crankshaft once destroying an engine undergoing testing.  It was Coventry at its climax; after the débacle of the FWMW, the company withdrew from Formula One, never to return.

1970 Porsche flat-16 prototype.

Porsche developed their flat-16 in the search for the power needed to compete with the big-capacity machines in the Can-Am series.  Unable further to enlarge their flat-12, their solution was to add a third more cylinders.  As an engine, it was a success and delivered the promised power but the additional length of the engine necessitated adding to the wheelbase of the cars and that upset their balance, drivers finding them unstable.  Porsche mothballed the flat-16 and resorted instead to forced-aspiration, the turbocharged flat-12 so effective that ultimately it was banned but not before it was tweaked to deliver a reputed 1500+ horsepower in Can-Am qualifying trim and, in 1975, at the Talladega raceway it was used to set the FIA closed course speed record at 221.160 mph (355.923 km/h); the mark stood for five years.  Had the 917 from the start been designed around a flat-16, it's history may have proved more remarkable still.

1966 Ford 289 V8 in GT40 Mk 1.

Not all the Ford GT40s had the photogenic cluster of eight velocity stacks.  When the Ford team arrived at Le Mans in 1966, their Mk II GT40s were fitted with a detuned version of the 427 cubic inch (7.0 litre) big-block FE engines used on the NASCAR circuits and instead of the multiple twin-choke carburetors with the velocity stacks familiar to the Europeans, it was fed by a single four barrel unit under a fairly agricultural looking air intake.  On the GT40s, the velocity stacks looked best on the 289 and 302 cubic inch (4.7 & 4.9 litre) small-block Windsor V8s, the ones built with the four downdraft Weber carburetors thought most charismatic and they're nicely complemented by the "bundle of snakes" exhaust systems.

1967 BRM H-16.

In typically English fashion, the 1949 BRM V16 is celebrated as a glorious failure.  In grand prix racing, it failed for many reasons but in one aspect, it was a great success: the supercharged 1.5 litre engine generated prodigious, if hard to handle, power.  Not discouraged, when a three litre formula was announced for 1966, BRM again found the lure of sixteen cylinders irresistible though this time, aspiration would be atmospheric.  It actually powered a Lotus to one grand prix victory in Formula One but that was its sole success.  Although nice and short, it was heavy and tall, the latter characteristic contributing to a high centre of gravity, exacerbated by the need to elevate the mounting of the block to make space for the exhaust system of the lower eight cylinders.  It was also too heavy and the additional power it produced was never enough to offset the many drawbacks.  Withdrawn from competition after two seasons and replaced by a more conventional V12, the FIA later changed the rules to protect BRM from themselves, banning sixteen cylinder engines.  Had BRM persisted, what was planned was four-valve head so the H-16's component count would have listed: 16 cylinders, 2 crankshafts, 8 camshafts, 2 distributers and 64 valves, making those who value intricacy porn most content.

1969 Ferrari 312P.

Build to comply with Group 6 regulations for prototype sports cars, the Ferrari 312 P was raced by the factory towards the end of the classic era for sports car racing which dated back to the early 1950s.  Fielded first with a three litre V12, it was re-powered with a flat-12 in 1971 and has often been described as the Ferrari Formula One car with bodywork and while a simplification, given the engineering differences between the two, that was the concept.  It appeared on the grid to contest the World Sportscar Championship in 1969, a return from a year of self-imposed exile after one of Enzo Ferrari's many arguments with the FIA.  Needing reliability for distance racing, the Formula One engine was slightly detuned and, as in the open wheeler on which it was based, acted as an integral load-bearing part of the structure.  Unlike Ferrari's earlier sports cars, this time the classic array of Webber carburetors was eschewed, the velocity stacks sitting atop Lucas mechanical fuel-injection.

Albert Einstein, Lindsay Lohan and velocity

Velocity plays is a critical component in Albert Einstein’s (1879-1955) Special (1905) & General (1915) Theories of Relativity which profoundly redined understanding of space, time, and gravity.  In the Special Theory of Relativity, there is an explanation of the perception of “simultaneity”: events simultaneous in one frame of reference may not be simultaneous in another frame moving at a different velocity.  The critical implication of this was that time was absolute but depends on the relative motion of observers.  This means a moving clock runs slower than one which is static (relative to the observer).  History’s second most quoted equation (number one said to be “2+2=4” although this is contested) is Einstein’s expression of mass-energy equivalence (E=mc²) which shows that mass and energy are interchangeable.  The significance in that of velocity is that as an object's velocity approaches the speed of light, its relativistic mass increases, requiring more energy to continue accelerating.  From this Einstein deduced the speed of light was the “universal speed limit” because for this eventually to be exceeded would require the input of an infinite amount of energy.  Whether such a state might have been possible in the first fraction of a second during the creation of the current universe remains a matter of speculation but as it now exists, the limit remains orthodox science although, for certain purposes, it is possible usefully to construct a model of the universe where, in a sense, "everything is happening at the same time", an abstraction which, paradoxically, is often used to illustrate why it's wrong.  This "everything is happening at the same time" model differs from one in which time doesn't exist: in such a place, everything would have to happen at once.     

The role of velocity in the General Theory of Relativity remains fundamental but is more complex still.  In addition to the dilation of time sue to relative motion, there is also “Gravitational Time Dilation” (due to relative motion, gravity itself causes time to dilate).  Objects moving in strong gravitational fields experience time more slowly than those existing in weaker fields.  Radically, what Einstein did was explain gravity not as a force (which is how we experience it) but as a curvature of space-time caused by the effects of mass & energy and the motion (and thus the velocity) of objects is is influenced by this curvature.  The best known illustration of the concept is that of “Geodesic Motion”: In curved space-time, a free-falling object moves along a geodesic path (the straightest possible between the points of departure & arrival). The velocity of an object influences its trajectory in curved space-time, and this motion is determined by the curvature created by mass-energy.

Two of Lindsay Lohan’s car most publicized car accidents.  All else being equal (which, as Albert Einstein would have explained, probably can’t happen), if an object is travelling at a higher velocity (in the casual sense of "speed"), the damage will be greater.  In these examples, at the point of impact, the Porsche 911 (997) CarreraS (2012, left) was travelling at a higher velocity than the Mercedes-Benz SL 65 AMG roadster (2005, right).

In classical (pre-Einstein) mechanics, the explanation would have been an object traveling at a higher velocity would have its kinetic energy increase quadratically with velocity (ie double the velocity and the kinetic energy increases by a factor of four.  In relativistic physics, as an object's velocity approaches the speed of light, its relativistic mass increases with velocity and relativistic mass contributes to the object's total energy.  For velocities much less than the speed of light (non-relativistic speeds (a car, even with Lindsay Lohan behind the wheel)), the increase in mass is negligible, and the primary difference is the increase in kinetic energy which follows the classical equation.  However, at velocities approaching the speed of light, both the kinetic energy and the relativistic mass increase significantly.  In a car crash, the main determinate of an impact's severity (and thus the damage suffered) is the kinetic energy:  A car traveling at a higher velocity will have significantly more kinetic energy, so any impact will be more destructive; the kinetic energy is determined by the square of the velocity meaning small a small increase in velocity results in a large increase in energy.  So, on the road, it’s really all about energy because the velocity attainable (relative to what’s going to be hit) means any increase in mass is going to be negligible.  However, were a car to be travelling at close to the speed of light the relativistic mass greatly would be increased, further contributing to the energy of the crash and making things worse still.

Virtual

Virtual (pronounced vur-choo-uhl)

(1) Being as specified in power, force, or effect, though not actually or expressly such; having the essence or effect but not the appearance or form.

(2) In optics, of an image (such as one in a looking glass), formed by the apparent convergence of rays that are prolonged geometrically, but not actually (as opposed to a real image).

(3) Being a focus of a system forming such images.

(4) In mechanics, pertaining to a theoretical infinitesimal velocity in a mechanical system that does not violate the system's constraints (applied also to other physical quantities); resulting from such a velocity.

(5) In physics, pertaining to a theoretical quality of something which would produce an observable effect if counteracting factors such as friction are disregarded (used often of the behavior of water if a factor such as friction were to be disregarded.

(6) In physics, designating or relating to a particle exchanged between other particles that are interacting by a field of force (such as a “virtual photon” and used also in the context of an “exchange force”).

(7) In digital technology, real, but existing, seen, or happening online or on a digital screen, rather than in person or in the physical world (actually an adaptation of an earlier use referring to political representation).

(8) In particle physics, pertaining to particles in temporary existence due to the Heisenberg uncertainty principle.

(9) In quantum mechanics, of a quantum state: having an intermediate, short-lived, and unobservable nature.

(10) In computing (of data storage media, operating systems, etc) simulated or extended by software, sometimes temporarily, in such a way as to function and appear to the user as a physical entity.

(11) In computing, of a class member (in object-oriented programming), capable of being overridden with a different implementation in a subclass.

(12) Relating or belonging to virtual reality (once often used as “the virtual environment” and now sometimes clipped to “the virtual”) in which with the use of headsets or masks, experiences to some degree emulating perceptions of reality can be produced with users sometimes able to interact with and change the environment.

(13) Capable of producing an effect through inherent power or virtue (archaic and now rare, even as a poetic device).

(14) Virtuous (obsolete).

(15) In botany, (literally, also figuratively), of a plant or other thing: having strong healing powers; a plant with virtuous qualities (obsolete).

(16) Having efficacy or power due to some natural qualities; having the power of acting without the agency of some material or measurable thing; possessing invisible efficacy; producing, or able to produce, some result; effective, efficacious.

1350–1400: From the Middle English virtual & virtual (there were other spellings, many seemingly ad hoc, something far from unusual), from the Old French virtual & vertüelle (persisting in Modern French as virtuel), from their etymon Medieval Latin virtuālis, the construct being the Classical Latin virtū(s) (of or pertaining to potency or power; having power to produce an effect, potent; morally virtuous (and ultimately the source of the modern English “virtue” from the Latin virtūs (virtue)) + -ālis.  The Latin virtūs was from vir (adult male, man), ultimately from the primitive Indo-European wihrós (man) (the construct of which may have been weyh- (to chase, hunt, pursue) + -tūs (the suffix forming collective or abstract nouns)).  The –alis suffix was from the primitive Indo-European -li-, which later dissimilated into an early version of –āris and there may be some relationship with hel- (to grow); -ālis (neuter -āle) was the third-declension two-termination suffix and was suffixed to (1) nouns or numerals creating adjectives of relationship and (2) adjectives creating adjectives with an intensified meaning.  The suffix -ālis was added (usually, but not exclusively) to a noun or numeral to form an adjective of relationship to that noun. When suffixed to an existing adjective, the effect was to intensify the adjectival meaning, and often to narrow the semantic field.  If the root word ends in -l or -lis, -āris is generally used instead although because of parallel or subsequent evolutions, both have sometimes been applied (eg līneālis & līneāris).  The alternative spellings vertual, virtuall and vertuall are all obsolete.  Virtual is a noun & adjective, virtualism, virtualist, virtualism, virtualness, virtualization (also as virtualisation) & virtuality are nouns, virtualize (also as virtualise) is a verb and virtually is an adverb; the noun plural is virtuals.  The non virtualosity is non-standard.

The special use in physics (pertaining to a theoretical infinitesimal velocity in a mechanical system that does not violate the system’s constraints) came into English directly from the French.  The noun use is derived from the original adjective.  Virtual is commonly used in the sense of being synonymous with “de facto”, something which can now be misleading because “virtue” has become so associated with the modern use related to computing.  In the military matters it has been used as “a virtual victory” to refer to what would by conventional analysis be thought a defeat, the rationale being the political or economic costs imposed on the “winner” were such that the victory was effectively pyrrhic.  It was an alternative to the concept of “tactical defeat; strategic victory” which probably was a little too abstract for some.

"Virtual art galleries" range from portals which enable works to be viewed on any connected device to actual galleries where physical works are displayed on screens or in some 3D form, either as copies or with a real-time connection to the original.   

In computing, although “virtual reality” is the best known use, the word has for some time been used variously.  “Virtual memory” (which nerds insist should be called “virtual addressing” is a software implementation which enables an application to use more physical memory than actually exists.  The idea dates from the days of the early mainframes when the distinction between memory and storage space often wasn’t as explicit as it would later become and it became popular in smaller systems (most obviously PCs) where at a time when the unit cost of RAM (random access memory) hardware was significantly higher than the default storage media of the HDD (hard disk drive).  Behaving as static electricity does, RAM was many orders of magnitude faster than the I/O (input/output) possible on hard disks but allocating a portion of free disk space to emulate RAM (hence the idea “virtual memory”) did make possible many things which would not run were a system able to work only with the installed physical RAM and rapidly it became a mainstream technique.

There’s also the VPN (virtual private network), a technology which creates a secure and encrypted connection over a public network (typically the Internet) and use is common to provide remote access to a private network or to establish a secure tunnel between two networks using the internet for transport.  The advantage of VPNs is they should ensure data integrity and confidentiality, the two (or multi) node authentication requirement making security breaches not impossible but less likely.  Widely used by corporations, VPNs are best known as the way traditionally used to evade surveillance and censorship in certain jurisdictions as diverse as the PRC (People’s Republic of China), the Islamic Republic of Iran and the UK although this is something of an arms race, the authorities with varying degrees of enthusiasm working out way to defeat the work-arounds.  VPNs often use an IP tunnel which is a related concepts but the IP tunnel is a technique used to encapsulate one type of network packet within another type of network packet to transport it over a network that wouldn't normally support the type of packet being transported.  IP tunnels are particularly useful in connecting networks using different protocols and (despite the name), the utility lies in them being able to transport just about any type of network traffic (not just IP).  A modular technology, not all IP tunnels natively provide authentication & encryption but most support “bolt-ons” which can add either or both.  So, while all VPNs use some form of tunnelling (however abstracted), not all tunnels are VPNs.

Microsoft really wanted you to keep their Java Virtual Machine.

Then there are “virtual machines”.  In personal computing, the machine came quickly to be thought of as a box to which a monitor and keyboard was attached and originally it did one thing at a time; it might be able to do many things but not simultaneously.  That situation didn’t long last but the idea of the connection between one function and one machine was carried over to the notion of the “virtual machine” which was software existing on one machine but behaving functionally like another.  This could include even a full-blown installation of the operating systems of several servers running on specialized software (sometimes in conjunction with hardware components) on a singles server.  What made this approach practical was that it is not unusual for a server to be under-utilized for most of its life (critically components often recording 2-3% utilization for extended periods, thus the attraction of using one physical server rather than several.  Obviously, the economic case was also compelling, the cost savings of having one server rather than a number multiplied by reductions in electricity use, cooling needs, insurance premiums and the rent of space.  There was also trickery, Microsoft’s JVM (Java Virtual Machine) an attempt to avoid having to pay licensing fees to Sun Microsystems (later absorbed by Oracle) for the use of a Java implementation.  The users mostly indifferent but while the hardware was fooled, the judges were not and the JVM was eventually declared an outlaw.

Operating a computer remotely (there are few ways to do this) rather than physically being present is sometimes called “virtual” although “remote” seems to have been become more fashionable (the form “telecommuting” used as early as 1968 is as archaic as the copper-pair analogue telephone lines over which it was implemented although “telemedicine” seems to have survived, possibly because in many places voice using an actual telephone remains a part).  In modern use (and the idea of virtual as “not physically existing but made to appear by software” was used as early as 1959), there are all sorts of “virtuals” (virtual personal trainers, virtual assistants etc), the idea in each case is that the functionality offered by the “real version” of whatever is, in whole or in part, emulated but the “virtual version”, the latter at one time also referred to as a “cyberreal”, another word from the industry which never came into vogue.  “Virtual keyboards” are probably the most common virtual device used around the world, now the smartphone standard, the demise of the earlier physical devices apparently regretted only by those with warm memories of their Blackberries.  Virtual keyboards do appear elsewhere and they work, although obviously offer nothing like the tactile pleasure of an IBM Model M (available from ClickyKeyboards.com).  The idea of “a virtual presence” is probably thought something very modern and associated with the arrival of computing but it has history.  In 1766, in the midst of the fractious arguments about the UK’s reaction to the increasing objections heard from the American colonies about “taxation without representation” and related matters (such as the soon to be infamous Stamp Act), William Pitt (1708-1778 (Pitt the Elder and later Lord Chatham); UK prime-minister 1766-1768) delivered a speech in the House of Commons.  Aware his country’s government was conducting a policy as inept as that the US would 200 years on enact in Indochina, his words were prescient but ignored.  Included was his assertion the idea of “…virtual representation of America in this house is the most contemptible idea that ever entered into the head of man and it does not deserve serious refutation.”  However, refute quite seriously just about everything his government was doing he did.  Pitt’s use of the word in this adjectival sense was no outlier, the meaning “being something in essence or effect, though not actually or in fact” dating from the mid-fifteenth century, an evolution of the sense of a few decades earlier when it was used to mean “capable of producing a certain effect”.  The adverb virtually was also an early fifteenth century form in the sense of “as far as essential qualities or facts are concerned while the meaning “in effect, as good as” emerged by the early seventeenth.

Lindsay Lohan's 2021 predictions of the US$ value of Bitcoin (BTC) & Ethereum (ETH).  By April 2024 the trend was still upward so the US$100,000 BTC may happen.  

In general use, the terms “cybercurrency”, “cryptocurrency” & “virtual currency” tend to be used interchangeably and probably that has no practical consequences, all describing electronic (digital) “currencies” which typically are decentralized, the main point of differentiation being that cryptocurrencies claim to be based on cryptographic principles and usually limited in the volume of their issue (although the decimal point makes this later point of little practical significance)  Whether they should be regarded as currencies is a sterile argument because simultaneously they are more and less, being essentially a form of gambling but for certain transactions (such as illicit drugs traded on various platforms), they are the preferred currency and in many jurisdictions they remain fully convertible and it’s telling the values are expressed almost always in US$, “cross-rates” (ie against other cryptocurrencies) rarely quoted.  However, to be pedantic, a “virtual currency” is really any not issued by a central government or authority (in the last one or two centuries-odd usually a national or central bank) and they can include in-game currencies, reward points and, of course, crybercurrencies.  The distinguishing feature of a cryptocurrency is the cryptotography.

Although the term is not widely used, in Christianity, "virtuality" was the view that contrary to the Roman Catholic doctrine of transubstantiation, the bread & wine central to Holy Communion do not literally transform into flesh and blood but are the medium or mechanism through which the spiritual or immaterial essence of the flesh and blood of Jesus Christ are received.  Within the Church, those who espoused or adhered to the heresy of virtuality were condemned as "virtualists.  In philosophy, the concept of virtuality probably sounds something simple to students but of course academic philosophy has a “marginal propensity to confuse”, the important distinction being “virtual” is not opposed to “real” but instead to “actual”, “real” being opposed to “possible”.

Afterburner

Afterburner (pronounced af-ter-bur-ner)

(1) In aviation, a device placed within, or attached to the exit of, a jet-engine exhaust pipe to produce afterburning.

(2) In engineering, a device in the exhaust system of an internal-combustion engine for removing or rendering harmless potentially dangerous components in the exhaust gases.

1948: A compound word, the construct being after + burn +-er.  The verb after developed from its use as an adverb and preposition, from the Middle English after-, efter- & æfter-, from the Old English æfter- (after, behind, against; later in time; in pursuit, following with intent to overtake), the idea being off + -ter (a comparative suffix), the original formation meant "more away, farther off”.  It was cognate with the Scots efter-, the Old Frisian & West Frisian efter-, the Dutch achter-, the German after-, the Swedish efter, the Old Norse eptir, the Old High German aftar, the Gothic aftra (behind), the Greek apotero (farther off) and the Old Persian apataram (further).  From circa 1300 it assumed the meaning "in imitation of; in the style of" while, as a conjunction in the sense of "subsequent to the time that" the use was inherited from the late Old English.  The phrase “after hours” (hours after regular working hours) dates from 1814 although the exact purpose has always proved elusive but it’s assumed by most to relate to retail commerce rather than terms of employment.  Afterwit was from circa 1500 and deconstructs literally as "wisdom that comes too late" but is familiar feeling of one for whom a perfect piece of repartee comes to mind only after the moment has passed; it’s perhaps surprising afterwit didn’t endure in the language.  The phrase “after you” an element in etiquette meaning “yielding precedence to another” dates from 1650.

Burn was from the Middle English bernen & birnen, from the Old English birnan (to burn), a metathesis from the Proto-West Germanic brinnan, from the Proto-Germanic brinnaną (to burn), from the primitive Indo-European bhrenw- and related to the Middle Irish brennim (drink up) & bruinnim (bubble up), the present stem from bhrewh- & bhru- (linked to the Middle Irish bréo (flame), the Albanian burth, the Cyclamen hederifolium (mouth burning) and the Sanskrit भुरति (bhurati) (moves quickly, twitches, fidgets).  The verb was from the early twelfth century brennen (be on fire, be consumed by fire; be inflamed with passion or desire, be ardent; destroy (something) with fire, expose to the action of fire, roast, broil, toast; burn (something) in cooking) which when applied to objects imparted the sense of “to shine, glitter, sparkle, glow like fire”, the form from both the Old Norse brenna (to burn, light) an two originally distinct Old English verbs: the transitive bærnan (to kindle) and the intransitive beornan (be on fire).  All of these were from the Proto-Germanic brennanan (causative brannjanan), source also of the Middle Dutch bernen, the Dutch branden, the Old High German brinnan, the German brennen, the Gothic brannjan (to set on fire); the ultimate etymology uncertain.  The noun burn dates from circa 1300 in the sense of "act or operation of burning” and was from the Old English bryne, the etymology identical to the verb and prior to the mid-sixteenth century, the usual spelling was brenne.

The Figurative use of burn (of passion, conflict etc.) was in Old English and survives to this day while the literal sense of "be hot, radiate heat" was from the later thirteenth century, the meaning "produce a burning sensation, sting" from a hundred years later.  A further figurative sense, that of "being cheated, swindled or victimized" emerged in the 1650s on the notion that whatever one lost “may as well have been burned”.  The slang use of burned from the late eighteenth century meaning "infected with venereal disease" referred to the sensation which was one of the symptoms.  To “burn one's bridges (behind one)” meant "behave so as to destroy any chance of returning to a status quo" and was used in the late nineteenth century, perhaps because of some of the reckless cavalry operations documented during the US Civil War although it’s a variation on the “burn the boats” (so one’s soldiers have no alternative but to fight, there being no chance of escape) approach known since Antiquity.  To have money “burn a hole in (one's) pocket” was a critique from the 1850s of those with an irresistible propensity to spend whatever money was in one’s possession; the modern expression of economists is of “expenditure rising to meet income”.  The meaning "mark or injury made by burning" is from 1520s while “slow burn” dates from 1938 and refers to a technique in acting.

The –er suffix was from the Middle English –er & -ere, from the Old English -ere, from the Proto-Germanic -ārijaz, thought usually to have been borrowed from Latin –ārius and reinforced by the synonymous but unrelated Old French –or & -eor (the Anglo-Norman variant was -our), from the Latin -(ā)tor, from the primitive Indo-European -tōr.  The –er suffix was added to verbs to create a person or thing that does an action indicated by the root verb; used to form an agent noun.  If added to a noun it usually denoted an occupation.

The afterburner

Attracted by theoretical work which hinted at improved thrust, Rolls-Royce began ground tests on one of their early jet engines in 1944 although the war ended before the technology was ready for production.  By the early 1950s, most advanced jet fighters had adopted afterburners and they continue generally to be used mostly in military aircraft although a few civilian applications have existed including the now defunct Tupolev Tu-144 and Concorde.

An afterburner’s purpose is to provide an increase in thrust, usually for supersonic flight, takeoff and in combat. Afterburning is achieved by injecting additional fuel downstream of the turbine and produces significantly increased thrust; the trade-off being very high fuel consumption and inefficiency, though this is considered acceptable for the short periods during which it is usually used.  The quantum of a jet-engine’s thrust is determined by the general principle of mass flow rate and thrust depends on two things: the velocity of the exhaust gas and the mass of that gas. A jet engine can produce more thrust by either accelerating the gas to a higher velocity or by having a greater mass of gas exit the engine.  Designing a basic turbojet engine around the second principle produces the turbofan engine, which creates slower gas but more of it. Turbofans are highly fuel efficient and can deliver high thrust for long periods, but the design trade-off is a large size relative to the power output. To generate increased power with a more compact engine for short periods, an engine requires an afterburner. The afterburner increases thrust primarily by accelerating the exhaust gas to a higher velocity.

Lockheed SR-71 Blackbird afterburning for additional thrust during take-off (left) and Royal Australian Air Force (RAAF) General Dynamics F-111 Aardvark performing a dump-and-burn (right).

What many people think of as afterburners are actually displays of dump-and-burn at air shows, a procedure where dumped fuel is intentionally ignited using the plane's afterburner. A spectacular flame combined with high speed makes this an interesting sight but it’s just for entertainment.  Fuel dumping is used to reduce the mass of an aircraft about to undertake emergency landings and thus, for other than for safety reasons, dump and burn has no practical use.  In the slang of pilots who flew the early generation of fighters with afterburners the phrase was "lit up the burners" while the dump and burn is also called a "torching" or a "zippo".

Lighting up the burners: Lindsay Lohan in The Canyons (2013).

Flak

Flak (pronounced flak)

(1) Ground-based anti-aircraft fire using explosive shells.

(2) In casual use, criticism; hostile reaction; abuse.

1938: From the German Flak (anti-aircraft gun), condensed from Fliegerabwehrkanone (literally "air defense gun"), the acronym deconstructed from Fl(ieger) + a(bwehr) + k(anone).  The sense of "anti-aircraft fire" became generalized in English from 1940 and the flak jacket is attested from 1956.  The metaphoric sense of "criticism" is American English circa 1963.  The synonym (and military verbal shorthand) is ack-ack, which appears to have developed independently in the German and allied military, the former using (from 1939) acht-acht (eight-eight) as an informal reference to the 88mm canon, the later being World War I (1914-1918) signalers' phonetic spelling of "AA".  Jargon has its own life and even after the NATO Phonetic Alphabet was standardized in 1956, ack-ack was so distinctive and well-known there was no suggestion it should be replaced by alpha-alpha. 

Lindsay Lohan in flak jacket.

The homophone flack (public relations spokesman) was first noted in US use in 1945, initially as a noun but, almost immediately became also a verb and it’s always had the sense of handling adverse criticism; if necessary by lying ("taking the flak" as it were).  The origin is murky; there’s a suggestion it was coined at entertainment industry magazine Variety but the first attested use was in another publication.  Flack was said to have emerged because of a coincidence in existence between flak being used to describe criticism (analogous with anti-aircraft fire) and a certain Mr Flack, said to be a public relations spokesman in the movie business but, given the accepted etymology, most regards this as an industry myth.

The 88mm Flak Canon

Panzer VI (Tiger Tank 1) with 88mm canon, Sicily, 1943.

The German 88 mm anti-aircraft canon was developed during the 1930s and was one of the most versatile and widely used weapons of World War II (1939-1945), deployed as field artillery, in anti-aircraft batteries, in ground assault and anti-tank roles and, on the larger tanks, as canon.  The naval 88, although the same caliber, was an entirely different weapon, dating from 1905.

88mm Flak Gun, Russia, 1941.

However, its stellar reputation belied to some extent, latter-day battlefield reality.  Like much mass-produced German weaponry of World War II, the 88 lost some of its comparative advantage as the allies’ quantitative and (with a few notable exceptions, especially in jet and rocket propulsion) qualitative superiority in materiel became apparent.  As an anti-aircraft gun, the Flak 88 needed high muzzle velocity to reach the altitudes at which bombers flew (20,000+ feet (6000+m)) and to achieve that the projectile itself was relatively small.  The high velocity made the Flak 88 a formidable anti-tank weapon, but did limit its effectiveness as field artillery.  Right to the end however, it remained a potent force wherever the terrain was suitable.

Zoo Flak Tower, Berlin, 1945.

One place the Flak 88s weren’t used was on the three huge concrete structures in Berlin called the Flak Towers.  Because the newer British and US bombers flew at higher altitudes, the bigger 128 mm canon was required.

The best known of the structures was the Berlin Zoo Flak Tower (Flakturm Tiergarten), the construction of which was induced by the Royal Air Force’s (RAF) first bombing raids on the city in August 1940.  Even by the standards of the time, these attacks were small-scale and of no obvious military value but, like the raid on Tokyo staged by the US in 1942 and the seemingly quixotic cross-border incursions by forces of indeterminate origin probing Russia’s “special military operation”, they compelled a disproportionately large re-allocation of civilian and military resources.  Early in the war, Hermann Göring (1893–1946; leading Nazi 1922-1945 and Reichsmarschall 1940-1945) in his capacity as head of the air force (Luftwaffe) had been asked if the industrial Ruhr was at risk of being bombed and he assured the nation: “No enemy bomber can reach the Ruhr… if one reaches the Ruhr, my name is not Göring. You can call me Meyer.”  The Reichsmarschall might have believed his own publicity but the RAF did not though few in 1940 thought the more distant Berlin was vulnerable and the first raids, pin-pricks though they were compared with what was to come, embarrassed the Nazi hierarchy and convinced Adolf Hitler (1889-1945; German head of government 1933-1945 & head of state 1934-1945) to fear that ominous mantra of the 1930s: “The bomber will always get through”.

Accordingly, needing to retain popular support and well aware of the capital’s lack of air-raid shelters (though the leading Nazis and their families were well provided for), the Führer ordered the construction of huge anti-aircraft gun towers, the designs submitted for his approval as early as the following March.  Construction began immediately and the first, the Berlin Zoo Flak Tower, was made operational within months and in its massiveness was entirely typical of the architectural practices of the Third Reich.  Reflecting Hitler’s preferences, it was rendered in a neo-Romantic style and any medieval soldier would have recognized it as a fortress, albeit one on a grand scale.  It gained its name by virtue of its proximity to the municipal zoo and the term “tower” was a rare instance of modesty of expression during the Nazi era.  The reinforced concrete structure was as tall as a 13-story building with a 70 x 70 m (230 x 230 feet) footprint and in addition to the flak guns on the roof, it housed an 85-bed hospital, extensive storage space for art works & cultural artifacts as well as the capacity to provide shelter for some 15,000 people (a number greatly exceeded later in the war when the raids became both frequent and severe.

The installed armament was a battery of four 128 mm (5 inch) twin Flak mounts, augmented by 20 mm (¾ inch) and 37-mm (1½ inch) guns on lower platforms, the sides of the tower 8 m (26 feet) thick, the roof 5 m (16 feet).  The versatility of the design was proven when in 1945 the city was under assault by the Red Army and the big guns were deployed at low angle, proving highly effective as tank destroyers and according to the estimates of both sides, delaying the entry of Soviet troops by almost two weeks.  Even then, after the city had been occupied and the surrender negotiated, the Germans remained in control of the tower, the thick walls having withstood all attacks.  After the war, it proved difficult to demolish and it was only in 1948, after several attempts and over 100 tons of explosives that finally it was razed, the land eventually returned to the Berlin Zoo.

Ghat

Ghat (pronounced gat, got (Indian) or gawt (Indian) or (apparently optionally) fat/fhat for certain slang)

(1) In India, a wide set of steps descending to a river, especially a river used for bathing; a mountain pass; a mountain range or escarpment; a place of cremation (also as burning-ghat).

(2) A leaf possessing simulative qualities, chewed in Yemen, Ethiopia, Somalia, and among Yemenite Jews in Israel.  Ghat chewing sessions are social and involve playing music, smoking a nargilah (a hookah-type device for smoking) and what’s sometimes described as “other such Eastern reveries” (usually with initial capital).

(3) Among the criminal classes, a slang word for a firearm, derived from the Gat Air Pistol, a low-velocity air-powered pistol produced circa 1937-1996 which fired a variety of projectiles.

(4) An acronym standing for Give Hope And Take (away), a short series of events in which someone gives hope to another then instantly and ruthlessly takes it away.

(5) Slang for something very good or much admired, "ghatness" thus a desirable quality (class specific with a noted ethnic bias in use).

(6) As a homophone, slang for the Gatling Gun.

(7) As the homophonic acronym GATT, the General Agreement on Tariffs & Trade (1947-1995), predecessor of the World Trade Organization (WTO) arrangements.

(8) In Hinduism, a certain type of temple.  A brahmin (a member of the highest (priestly) caste) who acted as the hereditary superintendent of a particular ghat (temple) and who was regarded as authoritative in matters of genealogy and ritual was known as a panda.

1595–1605: From Hindi घाट (ghāṭ) (a pier; a pass of descent from a mountain, hence also "mountain range, chain of hills," also "stairway leading up from a river" (to a shrine, temple, etc.), from the Sanskrit घट्ट (ghaṭṭa or ghattah) (a landing-place, steps on the side of a river leading to the waters).  The Sanskrit is of unknown origin but there may be a connection with the Telugu కట్ట (kaṭṭa) (dam, embankment).  In Indian use, the related form is ghaut.  Under the Raj, some language guides suggested a ghaut differed from a ghat in that the former was used exclusively to describe “a ravine leading to the sea” but this was later discredited.  The mistake probably arose in assuming a local practice was universal and it appears ghaut and ghat were inconsistently but widely used interchangeably (the plural was ghauts).  Ghat is a noun; the noun plural is ghats and all derived forms (ghating, ghated, ghatness etc are non-standard).

As a point of usage, it appears the slang forms of ghat should be pronounced with a hard “G” except when used in meaning 5 (above) when an “ef” or “ph” (as in fat or phat) is used.  It’s an important convention of use: If one has just been ghatted in the sense of meaning 4 (above), it’s correct to say “The bitch really gatted me” and not “The bitch really phatted me”.  That really seems just common sense.        

The Gat Air Pistol

Gat air pistol advertisement.

The Gat Air Pistol was made by the Harrington company in the United Kingdom.  It was in production continuously between the late 1930s and late 1990s, except during the World War II (1939-1945) when the factory re-tooled for war production.  The pistol could fire .177 pellets, ball bearings, darts, corks and anything else small and light enough to suit the barrel.  A low-powered weapon with a very low muzzle velocity, the target market was hobbyists and children, the latter predictably usually boys; there was a time when they were given such things.  The other lucrative market was the travelling fair.  In every sideshow ally there were usually several shooting gallery stall owners who offered infamously worthless prizes for anyone able to hit the target and for their purposes, the cheaply-produced, notoriously inaccurate Gat was ideal.  Anyone who could hit a target with a Gat gun was probably a pretty bad shot.

1920s US advertising.

Many Sociologists, psychologists and others have pondered why, despite generations of US youth having what was by international standards ready access to firearms, mass shootings at schools by them didn't exist as a phenomenon until the 1990s and the explanations offered have included (1) the effect of the internet, (2) the relaxation of censorship in popular culture, (3) the availability of high-powered, rapid fire weapons with large capacity magazines, (4) the use of increasingly potent narcotics at younger age of first use & addiction and (5) the rise of single parent (typically a mother) households.  

Venge

Venge (pronounced venj)

To avenge; to punish; to revenge (archaic).

1250–1300: From the Middle English vengen from the Old French venger & vengier (take revenge, avenge, punish) from the Latin vindicāre (assert a claim, claim as one's own; avenge, punish; vindicate). Also archaic were the related forms were vengefully, vengefulness venged & venging whereas the adjective vengeful, although rare, endured.  The noun vengeance, from the same era as venge, flourished.  Vengeance was from the Anglo-French vengeaunce, from twelfth century Old French vengeance & venjance (revenge, retribution).  Venge & avenge are verbs, revenge is a noun & verb, vengeance & vengefulness are nouns, vengeful is an adjective and vengefully is an adverb; the most common noun plural is vengeances. 

Venge long ago became archaic and is now extinct except when used in a historical context or for literary effect.  Venge is the verb transitive, venges the third-person singular simple present, venging the present participle and venged the simple past and past participle.  Synonyms include vindicate, avenge, chasten, punish, chastise, revenge, repay, redress, requite, square, return, get, fix, retort, reciprocate, score, defend, match, justify and payback.  Venge is one of the unusual words in English which went extinct while various derived forms (vengeance; vengeful; avenge) flourished and the translations of the Bible probably encouraged use, God being vengeful, there’s much vengeance in the Bible:

Beloved, never avenge yourselves, but leave it to the wrath of God, for it is written, “Vengeance is mine, I will repay, says the Lord.” To the contrary, “if your enemy is hungry, feed him; if he is thirsty, give him something to drink; for by so doing you will heap burning coals on his head.” Do not be overcome by evil, but overcome evil with good.

Paul to the Romans; Romans 12:19–21

The vengeance weapons

The V-weapons deployed by Germany late in the World War II (1939-1945) all began as conventional projects of the military or the armaments industry but became known as the Vergeltungswaffen ("retaliatory weapons" or "reprisal weapons") after the label was in 1944 applied by Joseph Goebbels (1897–1945; Reich Minister of Propaganda 1933-1945) who used the word as a propaganda device, seeking to give civilians some hope there might be retaliation against (and perhaps even relief from) the area-bombing campaigns being conducted against cities all over the Reich.  The Allies generally translated Vergeltungswaffen as “vengeance weapons”, the best-known of the devices the V-1 & V-2. 

The terminology can be confusing, the vengeance weapons often conflated with the so-called Wunderwaffen (superweapons, or wonderweapons) of which there were literally dozens on drawing boards, in development or (occasionally) in use but the Vergeltungswaffen were just a highly-visible sub-set, although, being so well-publicized and relatively numerous, they do tend more to figure in the popular imagination.  Goebbels had been talking of the Wunderwaffen since 1943 and Adolf Hitler (1889-1945; Führer (leader), German head of government 1933-1945 & head of state 1934-1945) had hinted at their existence since 1939 although there’s still debate about the technology to which he alluded.  Confusingly, historians writing in English also use the term “miracle weapons”, perhaps because Hitler, once he realized the war was lost (and the timing of this is debated, a vague consensus being he probably understood it couldn’t be won after the strategic failure of Unternehmen Zitadelle (Operation Citadel or the Kursk offensive) in mid-1943 and that it was lost when the Ardennes counter-offensive (Battle of the Bulge) was abandoned early in January 1945) began increasingly to refer to the “Miracle of the House of Brandenburg”, a term coined by Frederick the Great (Frederick II, 1712–1786; King of Prussia 1740-1786) to describe the fortuitous series of political and military events which saved Prussia from defeat during the Seven Years' War (1756–1763).

By the latter stages of the war, in the remarkably frank reports compiled by the SD (the Sicherheitsdienst des Reichsführers-SS (Security Service of the Reichsführer-SS), the internal intelligence agency of the SS and Nazi Party), German civilians were noted  as being increasingly sceptical about the Wunderwaffen, using words like “wonder” and “miracle” with ill-disguised irony.  Despite the opinion of some today, Dr Goebbels understood the limits of propaganda and had by 1945 already toned-down the emphasis on the weapons and had switched the focus to matters at least slightly less implausible.  In the post-war German language, Wunderwaffe has survived as a (usually derisive) reference to any universal solution said to be something said (improbably) able to solve many or especially difficult problems.

The actual history of the Vergeltungswaffen became murky almost as soon as the war ended.  What are well documented are the V-1, V-2 & V-3 and there’s some evidence to suggest the V-4 label was, at least in some documents, applied to one or more weapon before the end of hostilities.  The confusion is thought to have been engendered by the normal military & industrial practice of using the "V" designation (denoting Versuchs (attempt, experimental)) plus a number to keep track of all the prototype or version numbers which had to be documented.  Although not mentioned in his dairies or elsewhere, Goebbels seemed just to have hijacked Versuchs (V) and done a rebrand, the word vengeance well-suited to the time and place to which the gangster Nazi state had delivered Germany.  He spoke in public only ever of the V-1 & V-2 and the V-3 is documented in the German military archive but for the V-4 and beyond, the application of the V-x nomenclature is speculative, V-4 having (after the war) been applied variously to a Nazi atomic bomb, the manned version of the V-1, a number of radiological devices and the A9/A10 rocket combination.

After the war, there was a great profusion of often duplicated records spread all over the Reich and it was almost all on paper.  Project codes weren’t standardized even within industries or branches of the military but what was adhered to was the universal allocation of a system of version identifiers, usually as numbers.  A "V" to designate Versuchsmuster (prototypes) was almost always used, usually in conjunction with whatever was the current model designation (eg Ta 189 v1, Me 210 v2 etc) but within project teams, a lot of working documents circulated with just a version number listed; that being all that was required by the team focusing on the one model.  It’s that, at least in part, that’s thought to account for so many different things being described as V-4, V-7 etc, misinformation the expansion of the internet appears to have made more prevalent.

Ironically, the dozens of Wunderwaffen to which so many resources were allocated ultimately achieved more for the Allies than the Germans.  After the war, the British, the Americans and the Russians all took whatever they could grab of the German military and scientific research establishment (equipment and personnel), carted it off, reassembled what they had and put the scientists to work.  In ballistics, rocketry and advanced aviation, the victorious powers of the late 1940s essentially had in their hands what represented probably decades of peace-time research.  It’s not that developments like trans-Atlantic airliners, the Intercontinental Ballistic Missiles (ICBM) or the moon landing wouldn’t have been possible without the windfall of the German research but these things almost certainly would have taken longer to achieve, presumably decades such was the pace of advancement during the war.

The Vergeltungswaffen eins (V-1) was the world’s first cruise missile.  One of the rare machines to use a pulse-jet, it emitted such a distinctive sound that those at whom it was aimed nicknamed it the “buzz-bomb” although it attracted other names including doodlebug.  In Germany, before Goebbels decided it was the V-1, the official military code name was Fi 103 (The Fi stood for Fieseler, the original builder of the airframe and most famous for their classic Storch (Stork), short take-off & landing (STOL) aircraft) but there were also the code-names Maikäfer (maybug) & Kirschkern (cherry stone).  Although not fast enough to be invulnerable either to air or ground-fire and insufficiently accurate to be used in precision attacks, it was nevertheless an outstandingly economical delivery system, able to carry a warhead of 850 kg (1,870 lb) to London at a tiny fraction of the cost of using manned aircraft for the same task with the priceless additional benefit of not risking the loss of aircrew.  While the Allied defenses against the V-1 did improve over time, it was only the destruction of the launch sites and the occupation of territory within launch range that ceased the attacks.  Until then, the V-1 remained a highly effective terror weapon but, like the V-2 and so much of the German armaments effort, bureaucratic empire-building and political intrigue compromised the efficiency of the project. 

The Vergeltungswaffen zwei (V-2) was developed first by the German military with the code name Aggregat 4 (A4) and was the first guided, long-range ballistic missile.  With a range of around 320 km (200 miles), it briefly entered the stratosphere (technically the mesosphere) on its trajectory towards the target and once in flight, there was no effective defense; falling to earth faster than the speed of sound, nor was there any warning.  Technologically, it was an extraordinary advance in delivery systems but it was a very expensive way (inaccurately) to deliver a relatively small payload of 725 kg (1,600 lb) of high explosive.  When nuclear warheads were developed, the economics of ballistic missiles were realized.  Deployed simultaneously too early in its development to be successful and too late in the war to realise its strategic purpose, the V2 was influential in the history of both ballistics and space exploration.  It (1) cost more to develop than the atom-bomb, (2) caused fewer casualties when deployed than died during its development and production (most of whom were slave-workers), (3) was the ancestor of the ICBMs and (4), saved the US one or two decades the of research required to produce both the ICBMs and the big Saturn rockets which powered the Apollo programme.  It’s a myth the V-2 had no strategic effect.  From the time the Allies were convinced the programme was a threat (and it took actual physical evidence to convince the British scientific establishment the V-2 was even theoretically possible), much attention was paid, even to the extent of diverting bomber command from their plans to instead concentrate some resources on the V-2.  As a terror weapon, the effectiveness was then unparalleled, the British government was forced to react to the effect on public morale.  Some historians still under-estimate just how many resources the Allies had to divert to deal with the V2s.

The Vergeltungswaffen drei (V-3) was a modern take on a very old-fashioned idea, the big-bore gun.  Essentially, the principle was of one barrel with the projectile launched with multiple charges, each successive propellant charge adding to the velocity and therefore the range.  The concept is something like that used in electronics whereby a signal transmitted along a wire is boosted at intervals by line-drivers to compensate for loses over distance.  To preserve secrecy during development, the project was known as the Hochdruckpumpe (High Pressure Pump or HDP) and, among engineers, it gained the nickname Fleißiges Lieschen (Busy Lizzie).  The idea in ballistics actually dates from the late nineteenth century and was conceived as a way of achieving a high-velocity, large calibre weapon while not requiting an excessively (and probably impossibly) large barrel.  Some of the V-3s were fired a brief operational life before the sites had to be abandoned because of the Allied advance and the two aimed at London were disabled in air attacks on their bunkers using 5,400-kilogram (11,900 lb) "Tallboy" deep-penetration “earthquake” bombs.  A number of claims have been made that certain weapons are the true Vergeltungswaffen vier (V-4) including a variety of missiles, nuclear devices and jet bombers but there’s no conclusive evidence any was ever labeled as such by either the German military or armaments industry.

The Pase Rock: Lindsay Lohan's Revenge.