Showing posts sorted by relevance for query Sump. Sort by date Show all posts
Showing posts sorted by relevance for query Sump. Sort by date Show all posts

Tuesday, March 28, 2023

Sump

Sump (pronounced suhmp)

(1) A hollow or pit into which liquid drains, such as a cesspool, cesspit or sink (sump a common alternative name for a cesspool).

(2) In machinery, a chamber at the bottom of a machine, pump, circulation system, etc, into which a fluid drains before recirculation or in which wastes gather before disposal.

(3) In internal combustion engines, the lowest (except in dry-sump systems) part of the crankcase of an internal-combustion engine, into which lubricants drain to form a reservoir.

(4) In mining or other extractive industries, a space where water is allowed to collect at the bottom of a shaft or below a passageway; the lowest part of a mineshaft into which water drains.

(5) In drilling, a pilot shaft or tunnel pushed out in front of a main bore.

(6) A synonym for crankcase (pre-war British-English, now obsolete).

(7) In certain British-English dialects, a swamp, bog, or muddy pool (now mostly obsolete except for historic references).

(8) In construction, an intentional depression around a drain or scupper that promotes drainage.

(9) In nautical use, the the pit at the lowest point in a circulating or drainage system.

(10) In spelunking, a completely flooded cave passage, sometimes passable by diving.

1375-1425: From the Middle English sompe, (marsh, morass) from either the Middle Dutch somp or the Middle Low German & Middle Dutch sump (cognate with German Sumpf), from the Old Saxon sump, from the Proto-West Germanic sump, all Germanic forms ultimately from the Proto-Germanic sumpaz (linked also to swamp), from the primitive Indo-European swombho- (spongy).  Variations of the Middle English forms (related to marshes and swamps) had been used in locality names since the mid-thirteenth century but, untypically, this appears not to have led to their adoption as surnames based on a family's proximity to such places.  That's presumably because of the historical aversion to such dank, smelly sites, moistness rarely viewed favorably where water is stagnant.    The meaning "pit to collect water" was first noted in the 1650s and in English the most common meaning (a reservoir of fluid to lubricate machinery) was picked up by analogy and the first sump-pump was installed for mine-drainage in 1884.  The alternative spelling was sumph, obsolete since the seventeenth century.  Sump is a noun & verb, sumped is a verb; the noun plural is sumped.

The dry sump

A dry sump schematic. 

The somewhat misleadingly-named dry sump is a system for lubricating engines with oil drawn from a remote reservoir rather than a pan mounted at the lowest point beneath the engine.  Advantages are (1) increased power through lower crankshaft friction, (2) larger oil capacity, (3) consistent oil-pressure through removal of g-force effects, (4) reduced centre of gravity through lower mounting of the engine and (5) simplified oil-pump maintenance (the accessibility improved by the external mounting).  Disadvantages are (1) cost, (2) complexity and (3) a slight increase in weight.

Mercedes-Benz 300 SEL 6.3 (W109, 1968-1972, left) & 450 SEL 6.9 (W116, 1975-1981, right)

When Mercedes-Benz developed the 450 SEL 6.9 to replace the 300 SEL 6.3, the engine’s (the M-100) wet sump was changed to dry.  This wasn’t to gain the dry-sump’s traditional benefits but an engineering necessity imposed by the new model’s lower hood (bonnet)-line.  With the wet sump installed, the big V8 simply wouldn’t fit.  The term "wet sump" is usually tautological but is used when discussing engines equipped variously with both simply to ensure there's no confusion.

Of sumps and sumptuousness  

Lindsay Lohan in 2011 Maserati Gran Turismo, Los Angeles, 2011.  Especially since the 1980s, Maseratis have been noted for their sumptuous interior appointments, the timberwork and soft leather making an inviting cabin.  Most version of the Gran Turismo (2007-2019) used a conventional wet sump but the Gran Turismo MC Stradale (2011-2015), a high-performance version of the Gran Turismo S (2008-2012), was dry sumped.

Linguistically promiscuous, English is a slut of a language which has picked up words from around the world, keeping them if they seem useful (even assimilating them as English words) and discarding them as they fall from use or can be replaced by something better.  This has advantages in flexibility and avoids the duplication which would ensue were new forms created.  It can however be confusing for those learning English because different traditions use varied spelling and phonetic conventions so what one root or element borrowed by English for one purpose might appear in conflict with another.  For someone learning English it would be reasonable to assume the meaning of the adjective "sumptuous" would be “of or pertaining to the design or construction of sumps” whereas it’s actually used to demote something “magnificent, lavish, splendid or luxurious”.  There are few images more disparate than a sump and something sumptuous.  Sumptuous was from the French somptueux, from the Latin sumptuōsus, from sūmptus (costly, very expensive; lavish, wasteful), the construct being sumō (I take) + -tus (the noun forming suffix), the past participle of sumere (to borrow, buy, spend, eat, drink, consume, employ, take, take up), a contraction of subemere, the construct being sub- (under) + emere (to take, buy) from the primitive Indo-European root em- (to take, distribute).  The most common derived forms are the noun sumptuousness and the adverb sumptuously.

Thursday, April 20, 2023

Scavenge

Scavenge (pronounced skav-inj)

(1) To take or gather (something hopefully usable) from discarded material.

(2) To cleanse of filth, as in cleaning a street (in the UK “scavenger” was once a term for a municipal street sweeper).

(3) In internal combustion engines (1) to expel burnt gases from a cylinder

(4) As “oil scavenger”, a device used to remove excess or unwanted oil from certain areas of various types of engine.

(5) In metallurgy, to purify molten metal by introducing a substance, usually by bubbling a suitable gas through it (the gas may be inert or may react with the impurities).

(6) In democratic politics (in preferential voting systems), to negotiate with other candidates or party machines to obtain preferences (usually on a swap basis).

(7) To act as a scavenger; to search (applied especially to creatures which look for food among the carrion killed by others).

(8) In chemistry, to act as a scavenger (for atoms, molecules, ions, radicals, etc).

(9) In historical UK use, a child employed to pick up loose cotton from the floor in a cotton mill.

1635–45: A back formation from scavenger, from the Middle English scavager, from the Anglo-Norman scawageour (one who had to do with scavage, inspector, tax collector), from the Old Northern French scawage & escauwage (scavenge) and the Old French scavage & escavage, an alteration of escauvinghe (the Medieval Latin forms were scewinga & sceawinga), from the Old Dutch scauwōn (to inspect, to examine, to look at).  The verb scavenge in the 1640s was first a transitive verb in the sense of “cleanse from filth” while the intransitive meaning “search through rubbish for usable food or objects” was in use at least by the 1880s and the idea of “extracting & collecting anything usable from discarded material” dates from 1922.  Scavenge is a verb, scavenged, scavengering & scavenging are verbs & adjectives, scavengeable is an adjective and scavenger & scavengerism are nouns; the noun plural is scavengers.

Lindsay Lohan: Fear of scavengers.

The noun scavenger dates from the 1540s and described originally “a person hired to remove refuse from streets” (a job which would come later to be known as a “street sweeper”, a modification of the late fourteenth century Middle English scavager & scawageour, the title of the employee of London city who originally was charged with collecting tax on goods sold by foreign merchants.  The origin of that title was the Middle English scavage & scauage, from the circa 1400 Anglo-French scawage (toll or duty exacted by a local official on goods offered for sale in one's precinct), from the Old North French escauwage (inspection), from a Germanic source (it was related to the Old High German scouwon and the Old English sceawian (to look at, inspect) and from the same lineage came the modern English “show”.  In the 1590s it came into use in zoology to refer to creatures which look for food among the carrion killed by others.  The game of “scavenger hunt” seems to have gained the name in 1937 and one form of the word which went extinct was scavagery (street-cleaning, removal of filth from streets), noted in 1851.

Oil scavenge systems

In an internal combustion engine, an oil scavenger is a device used to remove excess or unwanted oil from certain areas of the engine, typically from the bottom of the engine's crankcase or oil pan.  The oil scavenger can help to prevent excessive oil pressure or foaming, something to be avoided because in high-performance engines operating under extreme conditions, excessive pressure can collapse pistons, a destructive process.  The core of the system is a scavenge-pump (some even suction mechanisms) which draw the excess oil from the engine and directs it back into the oil pan or an external reservoir.

Internal combustion engine with dry sump and oil scavenging system.

The classic use of oil salvage is in dry sump lubrication systems in which the oil that is supplied by the pressure pump drains off the engine as a frothy, thoroughly-mixed air-oil suspension into a relatively shallow, low-capacity, sump that is often contoured around the rotating crankshaft-assembly.  In this system, there are several scavenge pump stages that pump the aerated oil from the “dry” sump and into the external oil tank that has the dual-assignment of (1) storing the major amount of the engine oil supply and (2) de-aerating the mixture being returned by the scavenge pump(s).  After lubricating the various components, the oil flows into the sump at the bottom of the engine and from here the scavenge stages of the pump retrieves the highly-aerated oil, delivering the mix through a filter and then to a centrifugal and boundary-layer air-oil separation system in the oil tank. The air extracted from the scavenge oil exits the system through the breather and the result is cool, clean oil into the external tank ready for recirculation.

Aircraft turbine engine with oil scavenging system.

Oil salvage systems are especially critical in aviation.  In car engines, used oil is able to drain down into the oil pan, where it can be circulated back through the engine or cooling system but at altitude, gravity or air pressure may not be sufficient for oil to drain on its own and for these reasons aircraft are equipped with scavenge pumps to help pull the used oil out of the engine into a reservoir for cooling, de-aerating, and recirculation.  In hard-to-empty areas that are far from the oil sump (like the rear of the engine) a scavenge pump prevents the pooling of used oil.  The aircraft scavenge pump system does not have its own power source, but operates on a designated line from the main electrical system and on bigger aircraft powered by turbines with large oil capacity, as many as six scavenge pumps may operate in unison.

Wednesday, February 1, 2023

Baffle

Baffle (pronounced baf-uhl)

(1) To confuse, bewilder or perplex.

(2) To frustrate or confound; to thwart (a now archaic and probably obsolete seventeenth century use which didn’t of necessity involve the creation of confusion or bewilderment).

(3) To check or deflect the movement of (sound, light, fluids, etc.).

(4) To equip with a baffle or baffles.

(5) To cheat or trick; to hoodwink or deceive someone (used between the sixteenth & eighteenth centuries and now obsolete).

(6) To struggle ineffectually, as a ship in a gale (a nineteenth form rare except in Admiralty use).

(7) Publicly to disgrace, especially of a recreant knight (used between the sixteenth & seventeenth centuries and now obsolete).

(8) Something that balks, checks, or deflects (also called a baffle-board); an artificial obstruction for checking or deflecting the flow of gases (as in a boiler), sounds (as in the loudspeaker system of a radio or hi-fi set), light (as in a darkroom) or fluids (as in a tank).

(9) In audio engineering, any boxlike enclosure or flat panel for mounting a loudspeaker.

(10) In military camouflage, an architectural feature designed to confuse enemies or make them vulnerable.

(11) In coal mining, a lever for operating the throttle valve of a winding engine (US dialectal use).

1540-1550: Of uncertain origin but may have entered English from the Scots dialectal bauchle (to disgrace, treat with contempt, especially a perjured knight), from bauch or bachlen (publicly to condemn) and probably related to the early-modern French bafouer (to disgrace, to scorn, abuse or hoodwink) or the obsolete French befer (to mock) which was definitely picked up from the Scots bauchle.  The most likely root is the German natural sound of disgust, like bah which appears in the language as baff machen (to flabbergast) and the familiar modern meaning “to bewilder or confuse” is from 1640s while that of “to defeat someone's efforts” is from 1670s.  The use meaning “shielding device” dates from 1881 and “artificial obstruction” is from 1910.  The alternative spellings bafful & baffol are both obsolete.  Baffle is a noun & verb, bafflement & baffler are nouns and baffled & baffling are verbs & adjectives; the noun plural is baffles (or the rare bafflers).

As a noun, baffle emerged in the early 1880s, initially used mostly of the shielding device attached to stoves and ovens where it was short for “baffle-plate”, derived from the noun.  The earlier noun (from circa 1860) in the same sense was baffler, a word which can still be used to describe (1) something that causes one to be baffled, particularly a difficult puzzle or riddle & (1) in gaming, one of the projections inside a dice tower that serve to deflect the die unpredictably.  The noun bafflement (state of being baffled) dates from 1841 while the adjective baffling (bewildering, confusing, perplexing) was from 1733; it was the present-participle adjective from the verb baffle but also emerged in Admiralty slang (soon picked up in the merchant service) in the eighteenth century as a sailor's adjective for winds that blow variously and make headway difficult; although now rare, it survived into the age of steam.  The noun and verb bafflegab was first noted in 1952 and describes pretentious, incomprehensible, or overly technical language, especially legal or bureaucratic jargon; a synonym of gobbledygook (but not “hocus-pocus” or “mumbo-jumbo” which reference something nonsensical although use of those two is now probably proscribe because of their origin when speaking dismissively of the speech of African “witch doctors”.  The companion word is baffound (to perplex, bewilder by the use of bafflegab).

Although it had probably before been on the tips of not a few tongues, the words “baffle”, “baffling” & “baffled” in connection with Lindsay Lohan really spiked in 2016 when footage circulated of her speaking in distinctively different accent which used a conventional US English vocabulary but was delivered, with an occasionally halting delivery, the accent vaguely Russian or eastern European.  She later clarified thing by saying it was “…a mixture of most of the languages I can understand or am trying to learn”, adding that she’d been “…learning different languages since I was a child.  I'm fluent in English and French can understand Russian and am learning Turkish, Italian and Arabic”.  Taking advantage of the interest, she named the latest addition to the planet’s linguistic diversity “LiLohan” and a limited edition LiLohan clothing line was quickly made available as a philanthropic endeavour, part of the proceeds from each item sold going to Caudwell Children and the Disaster and Emergency Management Presidency of Turkey (AFAD).  Turkey is now properly called Türkiye Cumhuriyeti (Republic of Türkiye); the accepted short form Türkiye.

Baffled sump (left) and fuel tank (right).In cars, baffles are used in sumps and fuel tanks to prevent fluids sloshing around when subjected to the high lateral forces encountered in high-speed cornering.  With fuel tanks this ensures weight transfers are minimized while the purpose in a sump is to (1) avoid the oil surge or starvation which can happen if movement means the oil becomes removed from the oil-pump’s pickup & (2) assist in reducing the oil’s tendency to foam.  In Australia Ford included a baffled sump on the Falcon GTHO Phase III (1970-1971) and this was to be carried over to the abortive Phase IV (1972), the novelty with the latter being the race cars gaining tear-drop shaped “ears” welded to each side of the sump, adjacent to the oil pump.  The ears not only increased oil capacity but also, sitting as they did in the air-flow passing under the body, enhanced cooling.

Speak no evil: Alan Tudge.

Given the number of times the Australian Liberal Party has in recent years sought to celebrate the virtue of “personality responsibility” the evidence given by Alan Tudge (b 1971) to the royal commission investigating the “robodebt” scheme (a system which sought to “recover” what were alleged to be debts incurred by citizens who had failed to inform the government about their earnings) must to some have seemed baffling; not necessarily surprising, just baffling.  The scheme had been found to be unlawful but Mr Tudge, who served as (Liberal) minister for human services in 2017-2018 and was (under the Westminster system) “responsible” for the administration of “robodebt”, refused during questioning to accept ministerial responsibility for the unlawfulness of the scheme.  Despite being the minister in charge, Mr Tudge said it was not his responsibility check whether or not the robodebt scheme was lawful although he did seem to concede he was responsible for the scheme’s “lawful implementation”, adding that he assumed it was lawful, and had never been shown legal advice regarding its legality.  His position appeared to be based on what sounds a reasonable assumption: that the departmental secretary (the public servant in charge of the department) would not be implementing a program which he or she would know to be unlawful, something he described as “unfathomable”, adding that the scheme had gone through a rigorous cabinet process “which always has a legal overlay”.

Justice Jackson prosecuting, Albert Speer in the dock, Nuremberg, 1946. 

There are many books by academics, historians and former politicians which discuss the doctrine of ministerial responsibility but it's not known if the transcript of 20 June 1946 of the International Military Tribunal (the Nuremberg Trial) was in Mr Tudge's mind: Mr Justice Robert Jackson (1892–1954; US Supreme Court Justice 1941-1954; Chief US Prosecutor at the Nuremberg (IMT) trials of Nazi war criminals 1945-1946) cross-examining Albert Speer (1905–1981; Nazi court architect 1934-1942; Nazi minister of armaments and war production 1942-1945):

MR. JUSTICE JACKSON: Your statement some time ago that you had a certain responsibility as a Minister of the Government.  I should like to have you explain what responsibility you referred to when you say you assume a responsibility as a member of the Government; your common responsibility, what do you mean by your common responsibility along with others?

DEFENDANT SPEER: In my opinion, a state functionary has two types of responsibility.  One is the responsibility for his own sector and for that, of course, he is fully responsible.  But above that I think that in decisive matters there is, and must be, among the leaders a common responsibility, for who is to bear responsibility for developments, if not the close associates of the head of State?

This common responsibility, however, can only be applied to fundamental matters, it cannot be applied to details connected with other ministries or other responsible departments, for otherwise the entire discipline in the life of the state would be quite confused, and no one would ever know who is individually responsible in a particular sphere. This individual responsibility in one's own sphere must, at all events, be kept clear and distinct.

MR. JUSTICE JACKSON: Well, your point is, I take it, that you as a member of the Government and a leader in this period of time acknowledge a responsibility for its large policies, but not for all the details that occurred in their execution. Is that a fair statement of your position?

DEFENDANT SPEER: Yes, indeed.

MR. JUSTICE JACKSON: I think that concludes the cross-examination.

Alan Tudge at the 2017 Midwinter Ball with Liberal staffer Rachelle Miller.

Ms Millar also provided some interesting evidence to the “robodebt” royal commission and (pursuant to an unrelated matter) received from the Commonwealth a taxpayer-funded Aus$650,000 settlement for damages while working in two ministerial offices.  Ms Millar had accused Mr Tudge of being physically abusive towards her while in a consensual relationship and part of the settlement related to these matters, including compensation for loss of earning, hurt, distress, humiliation & medical and legal costs.  The Commonwealth did not admit liability but in paying Aus$650,000 seems to have assumed responsibility.  In a Clintonesque touch, Mr Tudge admitted he was at times sexually intimate with Ms Miller but insists he did not have “sexual intercourse” with that woman.

Thursday, June 22, 2023

Gullwing & Gull-wing

Gullwing & Gull-wing (pronounced guhl-wing)

(1) In aviation, an airplane wing that slants briefly upward from the fuselage and then extends horizontally outward (ie a short upward-sloping inner section and a longer horizontal outer section).

(2) Of doors, a door hinged at the top and opening upward (applied usually to cars but can be used in aviation, aerospace and architecture).

(3) Anything having or resembling (extended and partially extended) wings of a gull (and many other birds).

(4) In electronic hardware, a type of board connector for a small outline integrated circuit (SOIC).

(5) In historic admiralty jargon, a synonym of goose wing (a sail position).

Gull is from the Middle English gulle, from the Brythonic, from the Proto-Celtic wēlannā (seagull) and was cognate with the Cornish guilan, the Welsh gwylan, the Breton gouelan and the Old Irish faílenn.  The noun Gull was used (in a cook-book!) to describe the shore bird in the 1400s, probably from the Brythonic Celtic; it was related to the Welsh gwylan (gull), the Cornish guilan, the Breton goelann; all from Old Celtic voilenno-.  Gull replaced the Old English mæw.

The verb form meaning “to dupe, cheat, mislead by deception" dates from the 1540s, an adaptation by analogy from the earlier (1520) meaning "to swallow", ultimately from the sense of "throat, gullet" from the early 1400s.  The meaning was the idea of someone so gullible to “swallow whatever they’re told”.  As a cant term for "dupe, sucker, credulous person", it’s noted from the 1590s and is of uncertain origin but may be from the verb meaning "to dupe or cheat".  Another possibility is a link to the late fourteenth century Middle English gull & goll (newly hatched bird" which may have been influenced by the Old Norse golr (yellow), the link being the hue of the bird’s down.

Wing was from the late twelfth century Middle English winge & wenge (forelimb fitted for flight of a bird or bat), applied also to the part of certain insects which resembled a wing in form or function, from the Old Norse vængr (wing of a bird, aisle etc) from the Proto-Germanic wēinga & wēingan-.  It was cognate with the Danish vinge (“wing”), the Icelandic vængur (wing), the West Frisian wjuk (wing) and the Swedish vinge (“wing”), of unknown origin but possibly from the Proto-Germanic we-ingjaz ( a suffixed form of the primitive Indo-European root we- (blow), source of the Old English wawan (to blow).  It replaced the native Middle English fither, from the Old English fiþre & feðra (plural (and related to the modern feather)) from the Proto-Germanic fiþriją, which merged with fether, from the Old English feþer, from the Proto-Germanic feþrō).  The meaning "either of two divisions of a political party, army etc dates from circa 1400; the use in the architectures was first recorded in 1790 and applied figuratively almost immediately.  The slang sense of earn (one's) wings is 1940s, from the wing-shaped badges awarded to air cadets on graduation. To be under (someone's) wing "protected by (someone)" is recorded from the early thirteenth century; the phrase “on a wing and a prayer” is title of a 1943 song about landing a damaged aircraft.

A Gull in flight (left), inverted gull-wing on 1944 Voight Corsair (centre) & gull-wing on 1971 Piaggio P.136 (Royal Gull) (right).

In aviation, the design actually pre-dates powered flight (1903) by half a millennium, appearing in the speculative drawings of flying machines by Leonardo da Vinci (1452-1519) and others, an inevitable consequence of being influenced by the flapping wings of birds.  There were experiments, circa 1911, to apply the gull-wing principle to some of the early monoplanes in a quest to combine greater surface area with enhanced strength but it wasn’t until the 1920s it began widely to be used, firstly in gliders for some aerodynamic advantage and later, powered-aircraft.  In powered aircraft, the gull-wing offered little aerodynamically but had structural advantages in that it allowed designers more easily to ensure (1) increasingly larger propellers would have sufficient clearance, (2) undercarriage length could be reduced (and consequently strengthened) and (3) wing-spans could slightly be reduced, a thing of great significance when operations began on aircraft carriers, the gull-wing being especially suited to the folding-wing model.  Depending on the advantage(s) sought, designers used either a classic gull-wing or the inverted gull-wing.  The correct form is for all purposes except when applied to the the (1954-1957) Mercedes-Benz 300 SL coupé is the hyphenated gull-wing; only the 1950s Mercedes-Benz are called Gullwings.

1945 Jamin-Bouffort JB.

Cars with gull-wing doors had been built before Mercedes-Benz started making them at scale and the principle was known in both aviation and marine architecture.  One was the 1945 Jamin-Bouffort JB, the creation of French aeronautical engineer Victor-Albert Bouffort (1912-1995) who had a long history of clever, practical (and sometimes unappreciated) designs.  The Jamin-Bouffort JB was a relatively small three-wheeler built using some of the techniques of construction used in light aircraft, the gull-wing doors the most obvious novelty.  Anticipating the 1950s boom in micro-cars, there was potential but with European industry recovering from the war, most effort was directed to resuming production of pre-war vehicles using surviving tooling and there was little interest in pursuing anything which required development time.  Monsieur Bouffort would go on to design other concepts ahead of their time, some of his ideas adopted by others decades after his prototypes appeared.

Bugatti Type 64 with gull-wing body fabricated using original conceptual sketches on 1939 Type 64 chassis.

In 1939, Jean Bugatti drew up plans for the Type 64, a vehicle with gull-wing doors, his sketches an example of the great interest being shown by European manufacturers in aerodynamics, then called usually streamlining.  Although two Type 64s were completed in 1939, neither used the gull-wing doors and it would be another eighty-odd years before Bugatti’s design was realised when collector & president of the American Bugatti Club, Peter Mullin (b 1941), arranged the fabrication of the coachwork, based on the original drawings.  Built in exactly the same way craftsmen would have accomplished the task in 1939, the body was mounted on the surviving Type 64 chassis (64002), united for the first time with what Jean Bugatti called papillon (butterfly) doors which all (except the French) now call gull-wings.

Mercedes-Benz and the gull-wing.

1952 Mercedes-Benz 300 SL prototype (W194).

By 1951, although the Wirtschaftswunder (the post-war German “economic miracle”) still lay ahead, structural changes (the most important being the retreat by the occupying forces in the western zones from the punitive model initially adopted and the subsequent creation in 1948 of the stable deutschmark), had already generated an economy of unexpected strength and Mercedes-Benz was ready to make a serious return to the circuits.  Because the rules then governing Formula One didn’t suit what it was at the time practical to achieve, the first foray was into sports car racing, the target the ambitious goal of winning the Le Mans 24 hour race, despite a tight budget which precluded the development of new engines or transmissions and dictated the use of as much already-in-production as possible.

1952 Mercedes-Benz 300 SL prototype (W194).

It was the use of a production car engine designed not for ultimate power but smoothness, reliability and a wide torque band which ultimately dictated the use of the gull-wing doors.  The engine was the 3.0 litre (183 cubic inch) M186 straight-six used in the big 300 limousines and its two door derivatives, of advanced design by the standards of the time but also big, tall and heavy, attributes not helpful to race-car designers who prefer components which are compact, light and able to be mounted low in a frame.  A new engine not being possible, the factory instead created a variation, the M194, which used the triple-carburetor induction of the 300S coupés in an improved cylinder head, the innovation being the iron-block now lying at a 50o angle, thereby solving the problem of height by allowing it to be installed while canted to the side, permitting a lower bonnet line.  Using the existing gearbox, it was still a heavy engine-transmission combination, especially in relation to its modest power-output and such was the interest in lightness that, initially, the conventional wet-sump was retained so the additional weight of the more desirable dry-sump plumbing wouldn’t be added.  It was only later in the development-cycle that dry-sump lubrication was added.

1952 Mercedes-Benz 300 SL space-frame (W194).

The calculations made suggested that with the power available, the W194 would be competitive only if lightness and aerodynamics were optimized.  Although the relationship between low-drag and down-force were still not well-understood, despite the scientific brain-drain to the US and USSR (forced and otherwise) in the aftermath of the war, the Germans still had a considerable knowledge-base in aerodynamics and this was utilized to design a small, slippery shape into which the now slanted straight-six would be slotted.  There being neither the time nor the money to build the car as a monocoque, the engineers knew the frame had to be light.  A conventional chassis was out of the question because of the weight and they knew from the pre-war experience of the SSKL how expensive and difficult it was to reduce mass while retaining strength.  The solution was a space-frame, made from tubular aluminum it was light, weighing only between 50-70 kg (110-155 lb) in it’s various incarnations yet impressively stiff and the design offered the team to opportunity to use either closed or open bodies as race regulations required.

However, as with many forms of extreme engineering, there were compromises, the most obvious of which being that the strength and torsional rigidity was in part achieved by mounting the side tubes so high that the use of conventionally opening doors was precluded.  In a race car, that was of no concern and access to the cockpit in the early W194s was granted by what were essentially top-hinged windows which meant ingress and egress was not elegant and barely even possible for those of a certain girth but again, this was though hardly to matter in a race car.  In this form, the first prototypes were built, without even the truck-like access step low on the flanks which had been in the original plans.

1952 Mercedes-Benz 300 SL production coupé (W194).

Actually, it turned out having gull-wing windows instead of gull-wing doors did matter.  Although the rules of motorsport’s pettifogging regulatory body, the Fédération Internationale de l'Automobile (the FIA; the International Automobile Federation) were silent on the types and direction of opening doors and, in the pre-war era they had tolerated some essentially fake doors, their scrutineers still raised objections during inspection for the 1952 Mille Miglia.  The inspectors were forced to relent when unable to point to any rule actually being broken but it was clear they’d be out for revenge and the factory modified the frame to permit doors extending down the flanks, thereby assuming the final shape which would come to define the gull-wing door.  Relocating some of the aluminum tubing to preserve strength added a few kilograms but forestalled any retrospective FIA nit-picking.  To this day, the FIA's legions of bureaucrats seem not to realise why they’ve for so long been regarded as impediments to competition and innovation.

Le Mans, 1952.

First tested on the Nürburgring and Hockenheimring in late 1951, the W194, now dubbed 300 SL for promotional purposes, was in March 1952 presented to the press on the Stuttgart to Heilbronn autobahn.  In those happy days, there was nothing strange about demonstrating race cars on public highways.  The SL stood for Super Leicht (super light), reflecting the priority the engineers had pursued.  For decades, it was said by many, even normally reliable sources, that it stood for sports Sports Leicht (sports light), and the history of the Mercedes-Benz alphabet soup was such that it could have been either way (the SSKL of 1931 was the (Super Sports Kurz (short) Leicht (light)) and from the 1950s on even the factory used both Sports Leicht and Super Leicht.  It was only in 2017 it published a 1952 paper discovered in the corporate archive confirming the correct abbreviation is Super-Leicht.  Ten W194s were built for the 1952 season and success was immediate, second in the Mille Miglia; a trademark 1-2-3 result in the annual sports car race in Bern and, the crowning achievement, a 1-2 finish in the twenty-four hour classic at Le Mans.

Neither usually the most powerful nor the fastest car in the races it contested, the 300 SL nevertheless so often prevailed because of a combination of virtues.  Despite the heavy drive-train, it was light enough not to impose undue stress on tyres, brakes or mechanical components, the limousine engine was tough and durable and the outstanding aerodynamics returned surprising good fuel economy; in endurance racing, reliability and economy compensate for a lot of absent horsepower.

Nürburgring, 1952.

After the triumph at Le Mans, the SL won at the Eifelrennen and was then entered into in a race on the Nürburgring and to shed some weight, engineers converted three of the coupés to roadsters, emulating the body of one of the original ten which had been open-topped from the start.  To avoid any unpleasantness with the FIA, the section of the doors extending into the side of the car was retained and a smaller windscreen was installed to improve aerodynamics and afford the driver some protection from the weather and bugs unfortunate enough to be caught in the path.  The roofectomy reduced weight by about 100 kg (220 lb) which presumably helped, the four finishing in the first four places.

Winning W194, 1952 Carrera Panamericana Mexico, the metal struts were an ad-hoc addition after a bird strike.

One final adventure for the year yielded a perhaps unexpected success.  In November 1952, the factory entered two coupés and two roadsters in the third Carrera Panamericana Mexico, a race of 3100 kilometres (1925 miles) over five days and eight stages, their engines now bored out to 3.1 litres (189 cubic inches) increasing power from 175 bhp (130kw) to 180 (135).  The cars finished 1-2-3 although the third was disqualified for a rule violation and the winning car endured the intrusion at speed of a vulture through the windscreen.  Unlike the 300 SL, the unlucky bird didn’t survive.  There was however one final outing for the W194.  In 1955 it won the Rally Stella Alpina, the last time the event would be run in competitive form, one of many cancelled in the wake of the disaster at Le Mans that year in which 84 died and almost two-hundred injured.  Coincidently, that accident involved the W194’s successor, the 300 SLR.

1953 300 SL Prototype.

The 300 SL was re-engineered for the 1953 season, the bodywork now made from magnesium, lighter even than aluminum, the design of which had seen the car return to the wind-tunnel after which it gained a revised front section which not only reduced drag but also improved cooling by optimizing airflow to the radiator and engine compartment.  Power rose too.  Again drawing from wartime experience with the DB60x V12 aero-engine used in many German warplanes, direct fuel-injection was introduced which boosted output from 180 bhp (135 kw) to 215 bhp (158 kW).  Nor were the underpinnings neglected, the rear suspension design improved (somewhat) with the addition of the low-pivot single-joint swing axle (which would later appear on some production 300 SLs) while the transmission was flanged on the rear axle, not quite a transaxle but much improving the weight distribution.  The wheelbase was shortened by 100 millimetres (4 inches) and 16-inch wheels were adopted.  Even disk brakes were considered but the factory judged them years from being ready and it wouldn’t be until 1961 that they appeared on a Mercedes-Benz, more than half a decade after others had proved the technology on road and track.  There was however one exception to that, a disc brake had been installed between propeller shaft and differential on the high-speed truck built in 1954 to carry the Grand Prix cars between the factory and circuits in Europe.

The revised 300 SL however was never raced, the factory’s attention now turning to the Formula One campaign which, with the W196, would so successfully be conducted in 1954-1955, an off-shoot of which would be the W194’s replacement, the W196S sports car which would be based on the Grand Prix machine and dubbed, a bit opportunistically, the 300 SLR (Sport Leicht Rennen (Sport Light-Racing)).  Such was the impression made by the futuristic W194 that it would inspire production of the road-going 300 SL Gullwing (W198), 1400 of which were built during 1954-1957 (including 29 with aluminium bodies).

1955 Mercedes-Benz 300 SL (W194) (1954-1957).

Although the public found them glamorous, the engineers at Mercedes-Benz had never been enamoured by the 300 SL’s gull-wing doors, regarding them a necessary compromise imposed by the high side-structure of the space-frame which supported the body.  Never intended for use on road-cars, it was the guarantee of the US importer of Mercedes-Benz to underwrite the sale of a thousand gull-wing coupés that saw the 300 SL Gullwing enter production in 1954.  The sales predictions proved accurate and of the 1400 built, some eighty percent were delivered to North American buyers.  The W198 300SL was the model which became entrenched in the public imagination as “the Gullwing” and it’s the only instance where the word doesn’t need to be hyphenated.  Glamorous those doors may have been, they did impose compromises.  The side windows didn’t roll down, ventilation was marginal and air-conditioning didn’t exist; in a hot climate, one really had to want to drive a Gullwing.  There was also the safety issue, some drivers taking the precaution of carrying a hammer in case, in a roll-over, the inability to open the doors made the windscreen the only means of escape and roll-overs were perhaps more likely in a Gullwing than many other machines, the behavior of the swing axles sometimes inducing unwanted behavior in what was one of the fastest cars on the road although, in fairness, on the tyres available in the 1950s that was less of an issue than it would become on later, stickier rubber.

Mercedes-Benz 300 SLR (W196S), Stirling Moss & Denis Jenkinson, Mille Miglia, Italy, 1955.

The 300 SLR (W196S) was a sports car, nine of which were built to contest the 1955 World Sportscar Championship.  Essentially the W196 Formula One car with the straight-eight engine enlarged from 2.5 to 3.0 litres (152 to 183 cubic inches), the roadster is most famous for the run in the 1955 Mille Miglia in Italy which was won over a distance of 992 miles (1597 km) with an average speed of almost 100 mph (160 km/h); nothing like that has since been achieved.  There's infamy too attached to the 300 SLR; one being involved in the catastrophic crash and fire at Le Mans in 1955.

1955 300 SLR (W196S “Uhlenhaut” coupé). 

Two of the 300 SLRs were built with coupé bodies, complete with gull-wing doors.  Intended to be used in the 1955 Carrera Panamericana Mexico, they were rendered instantly redundant when both race and the Mercedes-Benz racing programme was cancelled after the Le Mans disaster.  The head of the programme, Rudolf Uhlenhaut (1906-1989), added an external muffler to one of the coupés, registered it for road use (such things were once possible when the planet was a happier place) and used it for a while as his company car.  It was then the fastest road-car in the world, an English journalist recording a top speed of 183 mph (295 km/h) on a quiet stretch of autobahn but Herr Uhlenhaut paid a price for the only partially effective muffler, needing hearing aids later in life.  Two were built (rot (red) & blau (blue), the names based on their interior trim) and for decades they remained either in the factory museum or making an occasional ceremonial appearance at race meetings.  However, in a surprise announcement, in June 2022 it was revealed rot had been sold in a private auction in Stuttgart for a world-record US$142 million, the most expensive car ever sold.  The buyer's identity was not released but it's believed rot is destined for a collection in the Middle East.  It's rumoured also the same buyer has offered US$100 million should an authentic 1929 Mercedes-Benz SSKL ever be uncovered.  

1970 Mercedes-Benz C-111 (1968-1970 (Wankel versions)).

Although the C-111 would have a second career in the late 1970s in a series of 5-cylinder diesel and V8 petrol engined cars used to set long-distance endurance records, its best remembered in its original incarnation as the lurid-colored (safety-orange according to the factory) three and four-rotor Wankel-engined gullwing coupés, sixteen of which were built.  The original was a pure test-bed for the Wankel engine in which so many manufacturers once had so much hope.  The first built looked like a failed high-school project but the second and third versions were both finished to production-car standards with typically high-quality German workmanship.  Although from the school of functional brutalism rather than the lovely things they might have been had styling been out-sourced to the Italians, the gull-winged wedges attracted much attention and soon cheques were enclosed in letters mailed to Stuttgart asking for one.  The cheques were returned, apparently there had never been plans for production even had the Wankel experiment proved a success.  The C-111 was fast, the four-rotor version said to reach 300 km/h (188 mph), faster than any production vehicle then available.

1991 Mercedes-Benz C112.

The C112 was an experimental mid-engined concept car built in 1991.  Designed to be essentially a road-going version of the Sauber-built C11 Group C prototype race car developed for the 1990 World Sports-Prototype Championship, it was powered by the 6.0 litre (366 cubic-inch) M120 V12 used in the R129 SL and C140/W140 S-Class variously between 1991-2001.  The C112 does appear to have been what the factory always claimed it was: purely a test-bed for technologies such as the electronically-controlled spring & damper units (which would later be included on some models as ABC (active body control)), traction control, rear wheel steering, tyre-pressure monitoring and distance-sensing radar.  As an indication it wasn't any sort of prototype intended for production, it offered no luggage space but, like the C111 twenty years earlier, it’s said hundreds of orders were received.  It was 1991 however and with the world in the depths of a severe recession, not even that would have been enough for a flirtation with thoughts of a production model.  After the C112, thoughts of a gull-wing were put on ice for another two decades, the SLR-McLaren (2003-2009) using what were technically “butterfly” door, hinged from the A-pillars.

2011 Mercedes-Benz SLS-AMG (2101-2014).

The factory’s most recent outing of the gull-wing door, the SLS, which used the naturally aspirated 6.2 litre (379 cubic inch) M159 DOHC V8, was produced between (2010-2014), a roadster version also available.  To allay any doubt, it was announced at the time of release that SLS stands for Super Leicht Sport (Super Light Sport) although such things are relative, the SLS a hefty 1600-odd kg (3,500 lb) although, in fairness, the original Gullwing wasn’t that much lighter and the SLS does pack a lot more gear, including windows which can be opened and air-conditioning.  In the way of modern marketing, many special versions were made available during the SLS’s relatively short life, even an all-wheel-drive electric version with a motor for each wheel.  Such is the lure of the gull-wing motif for Mercedes-Benz, it’s unlikely the SLS will be the last and a high-priced revival is expected to become a feature of the marketing cycle every couple of decades but we're unlikely to see any more V8s or V12s unless perhaps as a swan-song, AMG indicating recently they expect their 4.0 litre (244 cubic inch) V8 to remain in production for another ten years, Greta Thunberg (b 2003) and her henchmen the humorless EU bureaucrats permitting.

Lindsay Lohan at the Nicholas Kirkwood catwalk show, London Fashion Week 2015 with a prop vehicle (one of the gull-wing DMC DeLoreans modified closely to resemble the one used in the popular film Back to the Future (1985)).

Tesla Model X with falcon-wing doors.

Such was the allure of the 300 SL’s gull-wing doors that in the shadow they’ve cast for seventy-odd years, literally dozens of cars have appeared with the features, some of questionable aesthetic quality, some well-executed and while most were one-offs or produced only in small runs, there’s been the occasional (usually brief) success and of late some Teslas have been so equipped and with the novelty of them being the back doors, the front units conventionally hinged.  Tesla calls them “falcon wings” because the design was influenced by the bird.  However, the biomimicry was (for obvious reasons) not an attempt to gain the aerodynamic advantages of the falcon’s wing shape which affords exceptional maneuverability in flight but simply an adoption of the specific bone structure.  Unlike the fixed structure of the classic gull-wing door, the Tesla’s falcon-wing is fitted with an additional central joint which permits them to be opened in cramped spaces, aiding passenger ingress and egress.  Some Tesla engineers have however admitted the attraction of them as way to generate publicity and (hopefully) attract sales may have been considered during the design process.

Bricklin SV-1 (1974-1975, left) and DMC DeLorean (1981-1983, right).

Two of the best known of the doomed gull-wing cars were the Bricklin SV1 and the DeLorean, both the creations of individuals with interesting histories.  Malcolm Bricklin’s (b 1939) first flirtation with the automotive business was his introduction into the US market of the Subarus, built by the Japanese conglomerate Fuji Heavy Industries.  Having successfully imported the company’s scooters for some years, the model Mr Bricklin in 1968 chose was the 360, a tiny, egg-shaped device which had been sold in Japan for a decade, the rationale underlying his selection being it was so small and light it was exempt from just about any regulations.  Although really unsuited to US motoring conditions it was (at US$1300) several hundred dollars cheaper than a Volkswagen Beetle and had a fuel consumption around a third that delivered by the even the more economical US-built cars so it found a niche and some ten-thousand were sold before that gap in the market was saturated.  Ever imaginative, Mr Bricklin then took his hundreds of unsold 360s and re-purposed them essentially as large dodgem-cars, renting unused shopping-mall car-parks as ad-hoc race tracks and offering “laps” for as little as $US1.00.  He advertised “no speed limits” to attract the youth market but given the little machines took a reported 56 seconds for the 0-60 mph (0-100 km/h) run, reaching the legal limit in a car-park would have been a challenge.  Mr Bricklin achieved further success with Subaru’s more conventional (in a front wheel drive (FWD) context) 1000 and the corporation would later buy out his US interests for was thought to be a most lucrative transaction for both parties.

1969 Subaru 360 Deluxe.

His eponymous gull-winged creation was the SV-1 which, although nominally positioned as a “sports car” was marketed also as a “safety-vehicle” (hence the SV).  It certainly contained all of the safety features of the time and in that vein was offered mostly in lurid “high visibility” colors although the prototypes for an up-market “Chairman” version were displayed in more restrained black or white.  It was ahead of its time in one way, being fitted with neither ash-trays nor cigarette lighters, Mr Bricklin not approving of smoking and regarding the distractions of lighting-up while at the wheel a safety hazard.  Whether in stable conditions the car could have succeeded is speculative but the timing was extraordinarily unlucky.  The V8-powered car arrived on the market in 1974 shortly after the first oil shock saw a spike in the price of gasoline and in the midst of the recession and inflation which followed in the wake of that.  Between its introduction and demise, the costs of the SV1 more than doubled and there were disruptions to the production process because supply problems (or unpaid bills depending on who was asked) meant the AMC engine had to be replaced with a Ford power-plant.  By the time production ended, some 3000 had been built, but, not discouraged, Mr Bricklin would go on to import Fiat sports cars and the infamous Yugo before being involved with a variety of co-ventures with Chinese partners.

1970 Pontiac GTO.

John DeLorean (1925–2005) was a genuinely gifted engineer who emerged as one of the charismatic characters responsible for some of the memorable machines General Motors (GM) produced during its golden age of the 1950s & 1960s.  Under Mr DeLorean’s leadership, Pontiac in 1964 released the GTO which is considered (though contested by some) the first “muscle car” and the one responsible for the whole genre which would flourish for a crazy half-dozen years and in 1969 the Grand Prix which defined a whole market segment.  Apparently, the Grand Prix, produced at a low cost and sold at a high price was one of the most profitable lines of the era.  Given this, Mr DeLorean expected a smooth path to the top of GM but for a variety of reasons there were internal tensions and in 1973 he resigned to pursue his dream of making his own car.  It took years however to reach fruition because the 1970s were troubled times and like the Bricklin SV1, the DeLorean Motor Company’s (DMC) gull-winged DeLorean was released into a world less welcoming then had been anticipated.  By 1981, the world was again in recession and the complicated web of financing arrangements and agreements with the UK government to subsidize productions could have worked only if the design was good, demand was strong and the product was well-built, none of which was true.

1969 Pontiac Grand Prix 428 SJ.

As the inventory of unsold cars grew, so did the debt and desperate for cash, Mr DeLorean was persuaded (apparently without great difficulty) to become involved in the cocaine trafficking business which certainly offered fast money but his co-conspirator turned out to be an FBI informant who was a career criminal seeking a reduced sentence (on a unrelated matter) by providing the bureau with “a big scalp”.  At trial in 1984, Mr DeLorean was acquitted on all charges under the rule of "entrapment" but by then DMC was long bankrupt.  In the years since, the car has found a cult following, something due more to its part in the Back to the Future films than any dynamic qualities it possessed.  It was competent as a road car despite the rear-engine configuration and the use of an uninspiring power-plant but, apart from the stainless-steel bodywork and of course the doors, it had little to commend it although over the years there have been a number of (ultimately aborted) revivals and plans remain afoot for an electric gull-wing machine using the name to be released in 2024 or 2025.