Bubble

Bubble (pronounced buhb-uhl)

(1) A spherical globule of gas (or vacuum) contained in a liquid or solid.

(2) Anything that lacks firmness, substance, or permanence; an illusion or delusion.

(3) An inflated speculation, especially if fraudulent.

(4) The act or sound of bubbling.

(5) A spherical or nearly spherical canopy or shelter; dome.

(6) To form, produce, or release bubbles; effervesce.

(7) To flow or spout with a gurgling noise; gurgle.

(8) To speak, move, issue forth, or exist in a lively, sparkling manner; exude cheer.

(9) To seethe or stir, as with excitement; to boil.

(10) To cheat; deceive; swindle (archaic).

(11) To cry (archaic Scots).

(12) A type of skirt.

(13) In infection control management, a system of physical isolation in which un-infected sub-sets population are protected by restricting their exposure to others.

1350-1400: From the Middle English bobel (noun), possibly from the Middle Dutch bobbel and/or Middle Low German bubbele (verb), all probably of echoic origin.  Related forms appear as the Swedish bubbla, the Danish boble and the Dutch bobble.  The use to describe markets, inflated in value by speculation widely beyond any relationship to their intrinsic value, dates from the South Sea Bubble which began circa 1711 and collapsed in 1720.  In response to the collapse, parliament passed The Bubble Act (1720), which required anyone seeking to float a joint-stock company to first secure a royal charter.  Interestingly, the act was supported by the South Sea Company before its failure.  Ever since cryptocurrencies emerged, many have been describing them as a bubble which will burst and while that has happened with particular coins (the exchange collapses are something different), the industry thus far has continued with only the occasional period of deflation.  Bubble & bubbling are nouns & verbs, bubbler is a noun, bubbled is a verb, bubbly is a noun & adjective, bubbleless & bubblelike are adjectives and bubblingly is an adverb; the noun plural is bubbles.

An artificial tulip in elisa mauve.

However although the South Sea affair was the first use of “bubble” to describe such a market condition, it wasn’t the first instance of a bubble which is usually regarded as the Dutch tulpenmanie (tulip mania) which bounced during the 1630s, contract prices for some bulbs of the recently introduced and wildly fashionable tulip reaching extraordinarily high levels, the values accelerating from 1634 until a sudden collapse in 1637.  Apparently just a thing explained by a classic supply and demand curve, the tulip bubble burst with the first big harvest which demonstrated the bulbs and flowers were really quite common.  In history, there would have been many pervious bubbles but it wasn’t until the economies and financial systems of early-modern Europe were operating that the technical conditions existed for them to manifest in the form and to the extent we now understand.  Interestingly, for something often regarded as the proto-speculative asset bubble and a landmark in economic history, twentieth-century revisionist historians have suggested it was more a behavioral phenomenon than anything with any great influence on the operation of financial markets or the real economy, the “economic golden age” of the Dutch Republic apparently continuing unaffected for almost a century after the bottom fell out of the tulip market.  The figurative uses have been created or emerged as required, the first reference to anything wanting firmness, substance, or permanence is from 1590s.  The soap-bubble dates from 1800, bubble-shell is from 1847, bubble-gum was introduced in 1935 and bubble-bath appears first to have be sold in 1937.  The slang noun variation “bubbly” was first noted in 1920, an invention of US English.  

The word "bubble" spiked shortly after the start of the Covid-19 pandemic.  Over time, use has expanded to encompass large-scale operations like touring sporting teams and even the geographical spaces used for the 2022 Beijing Winter Olympics but the original meaning was more modest: small groups based on close friends, an extended family or co-workers.  These small bubbles weren't supposed to be too elastic and operated in conjunction with other limits imposed in various jurisdictions; a bubble might consist of a dozen people but a local authority might limit gatherings to ten in the one physical space so two could miss out, depending on the details in the local rules.  Bubble thus began as an an unofficial term used to describe the cluster of people outside the household with whom one felt comfortable in an age of pandemic.

Tulips

Bubbles were however a means of risk-reduction, not a form of quarantine.  The risks in a bubble still exist, most obviously because some may belong to more than one bubble, contact thus having a multiplier effect, the greater the number of interactions, the greater the odds of infection.  Staying home and limiting physical contact with others remained preferable, the next best thing to an actual quarantine.  The more rigorously administered bubbles used for events like the Olympics are essentially exercises in perimeter control, a defined "clean" area, entry into which is restricted to those tested and found uninfected.  At the scale of something like an Olympic games, it's a massive undertaking to secure the edges but, given sufficient resource allocation can be done although it's probably misleading to speak of such an operation as as a "bubble".  Done with the static-spaces of Olympic venues, they're really quarantine-zones.  Bubble more correctly describes touring sporting teams which move as isolated bubbles often through unregulated space.

The Bubble Skirt

A type of short skirt with a balloon style silhouette, the bubble dress (more accurately described as a bubble skirt because that’s the bit to which the description applies) is characterized by a voluminous skirt with the hem folded back on itself to create a “bubble” effect at the hemline.  Within the industry, it was initially called a tulip skirt, apparently because of a vague resemblance to the flower but the public preferred bubble.  It shouldn’t be confused with the modern tulip skirt and the tulip-bubble thing is just a linguistic coincidence, there’s no link with the Dutch tulipmania of the 1630s.  Stylistically, the bubble design is a borrowing from the nineteenth century bouffant gown which featured a silhouette made of a wide, full skirt resembling a hoop skirt, sometimes with a hoop or petticoat support underneath the skirt.   While bouffant gowns could be tea (mid-calf) or floor length, bubble skirts truncate the look hemlines tend to be well above the knee.  Perhaps with a little more geometric accurately, the design is known also as the “puffball” and, in an allusion to oriental imagery, the “harem” skirt.  Fashion designer Christian La Croix became fond of the look and a variation included in his debut collection was dubbed “le pouf” but, in English, the idea of the “poof skirt” never caught on.

Lindsay Lohan in Catherine Malandrino silk pintuck dress with bubble skirt, LG Scarlet HDTV Launch Party, Pacific Design Center, Los Angeles, April 2008.

It must have been a memorable silhouette in the still austere post-war world, a sheath dress made voluminous with layers of organza or tulle, the result a cocoon-like dress with which Pierre Cardin and Hubert de Givenchy experimented in 1954 and 1958, respectively. A year later, Yves Saint Laurent for Dior added the combination of a dropped waist dress and bubble skirt; post-modernism had arrived.  For dressmakers, bubble fashion presented a structural challenge and mass-production became economically feasible only because of advances in material engineering, newly available plastics able to be molded in a way that made possible the unique inner construction and iconic drape of the fabric.  For that effect to work, bubble skirts must be made with a soft, pliable fabric and the catwalk originals were constructed from silk, as are many of the high end articles available today but mass-market copies are usually rendered from cotton, polyester knits, satin or taffeta.

The bubble in the 1950s by Pierre Cardin (left), Givenchy (centre) & Dior (right).

The bubble skirt was never a staple of the industry in the sense that it would be missing from annual or seasonal ranges, sometimes for a decade or more and sales were never high, hardly surprising given it was not often a flattering look for women above a certain age, probably about seven or eight.  Deconstructing the style hints at why: a hemline which loops around and comes back up, created sometimes by including a tighter bottom half with the bulk of additional material above, it formed a shape not dissimilar to a pillow midway through losing its stuffing.  For that reason, models caution the look is best when combined with a sleek, fitted top to emphasize the slimness of the waistline, cinched if necessary with a belt some sort of delineating tie.  The bubble needs to be the feature piece too, avoiding details or accessories which might otherwise distract; if one is wearing a partially un-stuffed pillow, the point needs to be made it’s being done on purpose.

The bubble is adaptable although just because something can be done doesn’t mean it should be done.  The bubble skirt has however received the Paris Hilton imprimatur so there’s that.

On the catwalks however, again seemingly every decade or so, the bubble returns, the industry relying on the short attention span of consumers of pop culture inducing a collective amnesia which allows many resuscitations in tailoring to seem vaguely original.  Still, if ever a good case could be made for a take on a whimsical 1950s creation to re-appear, it was the staging of the first shows of the 2020-2021 post-pandemic world and the houses responded, Louis Vuitton, Erdem, Simone Rocha and JW Anderson all with billowy offerings, even seen was an improbably exuberant flourish of volume from Burberry.  What appeared on the post-Covid catwalk seemed less disciplined than the post-war originals, the precise constraints of intricately stitched tulle forsaken to permit a little more swish and flow, a romantic rather than decadent look.  The reception was generally polite but for those who hoped for a different interpretation, history suggests the bubble will be back in a dozen-odd years.

Beetle

Beetle (pronounced beet-l)

(1) Any of numerous insects of the order Coleoptera, having biting mouthparts and characterized by hard, horny forewings modified to form shell-like protective elytra forewings that cover and protect the membranous flight wings.

(2) Used loosely, any of various insects resembling true beetles.

(3) A game of chance in which players attempt to complete a drawing of a beetle, different dice rolls allowing them to add the various body parts.

(4) A heavy hammering or ramming instrument, usually of wood, used to drive wedges, force down paving stones, compress loose earth etc.

(5) A machine in which fabrics are subjected to a hammering process while passing over rollers, as in cotton mills; used to finish cloth and other fabrics, they’re known also as a “beetling machine”

(6) To use a beetle on; to drive, ram, beat or crush with a beetle; to finish cloth or other fabrics with a beetling machine.

(7) In slang, quickly to move; to scurry (mostly UK), used also in the form “beetle off”.

(8) Something projecting, jutting out or overhanging (used to describe geological formation and, in human physiology, often in the form beetle browed).

(9) By extension, literally or figuratively, to hang or tower over someone in a threatening or menacing manner.

(10) In slang, the original Volkswagen and the later retro-model, based on the resemblance (in silhouette) of the car to the insect; used with and without an initial capital; the alternative slang “bug” was also analogous with descriptions of the insects.

Pre 900: From the late Middle English bittil, bitil, betylle & bityl, from the Old English  bitula, bitela, bītel & bīetel (beetle (and apparently originally meaning “little biter; biting insect”)), from bēatan (to beat) (and related to bitela, bitel & betl, from bītan (to bite) & bitol (teeth)), from the Proto-West Germanic bitilō & bītil, from the Proto-Germanic bitilô & bītilaz (that which tends to bite, biter, beetle), the construct being bite +‎ -le.  Bite was from the Middle English biten, from the Old English bītan (bite), from the Proto-West Germanic bītan, from the Proto-Germanic bītaną (bite), from the primitive Indo-European bheyd- (split) and the -le suffix was from the Middle English -elen, -len & -lien, from the Old English -lian (the frequentative verbal suffix), from the Proto-Germanic -lōną (the frequentative verbal suffix) and was cognate with the West Frisian -elje, the Dutch -elen, the German -eln, the Danish -le, the Swedish -la and the Icelandic -la.  It was used as a frequentative suffix of verbs, indicating repetition or continuousness.  The forms in Old English were cognate with the Old High German bicco (beetle), the Danish bille (beetle), the Icelandic bitil & bitul (a bite, bit) and the Faroese bitil (small piece, bittock).

In architecture, what was historically was the "beetle brow" window is now usually called "the eyebrow".  A classic example of a beetle-brow was that of Rudolf Hess (1894–1987; Nazi deputy führer 1933-1941).  

Beetle in the sense of the tool used to work wood, stonework, fabric etc also dates from before 900 and was from the Middle English betel & bitille (mallet, hammer), from the Old English bītel, bētel & bȳtel which was cognate with the Middle Low German bētel (chisel), from bēatan & bētan (beat) and related to the Old Norse beytill (penis).  The adjectival sense applied originally to human physiology (as beetle-browed) and later extended to geological formations (as a back-formation of beetle-browed) and architecture where it survives as the “eyebrow” window constructions mounted in sloping roofs.  The mid-fourteenth century Middle English bitelbrouwed (grim-browed, sullen (literally “beetle-browed”)) is thought to have been an allusion to the many beetles with bushy antennae, the construct being the early thirteenth century bitel (in the sense of "sharp-edged, sharp" which was probably a compound from the Old English bitol (biting, sharp) + brow, which in Middle English meant "eyebrow" rather than "forehead."  Although the history of use in distant oral traditions is of course murky, it may be from there that the Shakespearean back-formation (from Hamlet (1602)) in the sense of "project, overhang" was coined, perhaps from bitelbrouwed.  As applied to geological formations, the meaning “dangerously to overhang cliffs etc” dates from circa 1600.   The alternative spellings bittle, betel & bittil are all long obsolete.  Beetle is a noun & verb & adjective, beetled is a verb, beetling is a verb & adjective and beetler is a noun; the noun plural is beetles.

The Beetle (Volkswagen Type 1)

First built before World War II (1939-1945), the Volkswagen (the construct being volks (people) + wagen (car)) car didn’t pick up the nickname “beetle” until 1946, the allied occupation forces translating it from the German Käfer and it caught on, lasting until the last one left a factory in Mexico in 2003 although in different places it gained other monikers, the Americans during the 1950s liking “bug” and the French coccinelle (ladybug) and as sales gathered strength around the planet, there were literally dozens of local variations, the more visually memorable including: including: bintus (Tortoise) in Nigeria, pulga (flea) in Colombia, ඉබ්බා (tortoise) in Sri Lanka, sapito (little toad) in Perú, peta (turtle) in Bolivia, folcika (bug) in Bosnia and Herzegovina, kostenurka (turtle) in Bulgaria, baratinha (little cockroach) in Cape Verde, poncho in Chile and Venezuela. buba (bug) in Croatia, boblen (the bubble), asfaltboblen (the asphalt bubble), gravid rulleskøjte (pregnant rollerskate) & Hitlerslæden (Hitler-sled) in Denmark. cepillo (brush) in the Dominican Republic, fakrouna (tortoise) in Libya, kupla (bubble) & Aatun kosto (Adi's revenge) in Finland, cucaracha (cockroach) in Guatemala, El Salvador and Honduras, Kodok (frog) in Indonesia, ghoorbaghei (قورباغه ای) (frog) in Iran, agroga عكروكة (little frog) & rag-gah ركـّة (little turtle) in Iraq, maggiolino (maybug) in Italy, kodok (frog) in Malaysia, pulguita (little flea) in Mexico and much of Latin America, boble (bubble) in Norway, kotseng kuba (hunchback car) & boks (tin can) in the Philippines, garbus (hunchback) in Poland, mwendo wa kobe (tortoise speed) in Swahili and banju maqlub (literally “upside down bathtub”) in Malta.

A ground beetle (left), a first generation Beetle (1939-2003) (centre) and an "New Beetle" (1997-2011).  Despite the appearance, the "New Beetle" was of front engine & front-wheel-drive configuration, essentially a re-bodied Volkswagen Golf.  The new car was sold purely as a retro, the price paid for the style, certain packaging inefficiencies. 

The Beetle (technically, originally the KdF-Wagen and later the Volkswagen Type 1) was one of the products nominally associated with the Nazi regime’s Gemeinschaft Kraft durch Freude (KdF, “Strength Through Joy”), the state-controlled organization which was under the auspices of the Deutsche Arbeitsfront (German Labor Front) which replaced the independent labor unions.  Operating medical services, cruise liners and holiday resorts for the working class, the KdF envisaged the Volkswagen as a European Model T Ford in that it would be available in sufficient numbers and at a price affordable by the working man, something made easier still by the Sparkarte (savings booklet) plan under which a deposit would be paid with the balance to be met in installments.  Once fully paid, a Volkswagen would be delivered.  All this was announced in 1939 but the war meant that not one Volkswagen was ever delivered to any of those who diligently continued to make their payments as late as 1943.  Whether, even without a war, the scheme could have continued with the price set at a politically sensitive 990 Reichsmarks is uncertain.  That was certainly below the cost of production and although the Ford Model T had demonstrated how radically production costs could be lowered once the efficiencies of mass-production reached critical mass, there were features unique to the US economy which may never have manifested in the Nazi system, even under sustained peace.  As it was, it wasn’t until 1964 that some of the participants in the Sparkarte were granted a settlement under which they received a discount (between 9-14%) which could be credited against a new Beetle.  Inflation and the conversion in 1948 from Reichsmark to Deutschmark make it difficult accurately to assess the justice of that but the consensus was Volkswagen got a good deal.  The settlement was also limited, nobody resident in the GDR (The German Democratic Republic, the old East Germany (1949-1990)) or elsewhere behind the iron curtain received even a Reichspfennig (cent).  

Lindsay Lohan with Beetle in Herbie: Fully Loaded (2005), Walt Disney Pictures' remake of The Love Bug (1968) (centre).  One of the Beetles used in the track racing sequences in Herbie: Fully Loaded is now on display in the Peterson Automotive Museum on Wilshire Boulevard, Los Angeles, California (left & right).

There were many Volkswagens produced during the war but all were delivered either to the military or the Nazi Party organization where they were part of the widespread corruption endemic to the Third Reich, the extent of which wasn’t understood until well after the end of the regime.  The wartime models were starkly utilitarian and this continued between 1945-1947 when production resumed to supply the needs of the Allied occupying forces, the bulk of the output being taken up by the British Army, the factory being in the British zone.  As was the practice immediately after the war, the plan had been to ship the tooling to the UK and begin production there but the UK manufacturers, after inspecting the vehicle, pronounced it wholly unsuitable for civilian purposes and too primitive to appeal to customers.  Accordingly, the factory remained in Germany and civilian deliveries began in 1947, initially only in the home market but within a few years, export sales were growing and by the mid-1950s, the Beetle was even a success in the US market.  The platform proved adaptable too, the original two-door saloon and cabriolet augmented by a van on a modified chassis which was eventually built in a bewildering array of body styles (and made famous as the Kombi and Microbus models which became cult machines of the 1960s counter-culture) and the stylish, low-slung Karmann-Ghia, sold as a 2+2 coupé and convertible.

Herr Professor Ferdinand Porsche (1875–1951) explaining the Beetle to Adolf Hitler (1889-1945; Führer (leader) and German head of government 1933-1945 & head of state 1934-1945) during the ceremony marking the laying of the foundation stone at the site of the Volkswagen factory, Fallersleben, Wolfsburg in Germany's Lower Saxony region, 26 May 1938 (which Christians mark as the Solemnity of the Ascension of Jesus Christ, commemorating the bodily Ascension of Christ to Heaven) (left).  Later the same day, during a secret meeting of Nazis, the professor was to display a scale-model of an upcoming high-performance version (right). 

The Beetle also begat what are regarded as the classic Porsches (the 356 (1948-1965) and the later 911 (1964-1998) and 912 (1965-1969 & 1976)).  Although documents filed in court over the years would prove Ferdinand Porsche’s (1875-1951) involvement in the design of the Beetle revealed not quite the originality of thought that long was the stuff of legend (as a subsequent financial settlement acknowledged), he was attached to the concept and for reasons of economic necessity alone, the salient features of the Beetle (the separate platform, the air-cooled flat engine, rear wheel drive and the basic shape) were transferred to the early post-war Porsches and while for many reasons features like liquid cooling later had to be adopted, the basic concept of the 1938 KdF-Wagen is still identifiable in today’s 911s.

The Beetle had many virtues as one might surmise given it was in more-or-less continuous production for sixty-five years during which almost 20 million were made.  However, one common complaint was the lack of power, something which became more apparent as the years went by and average highway speeds rose.  The factory gradually increased both displacement power and an after-market industry arose to supply those who wanted more, the results ranging from mild improvements to some quite wild creations.  One of the most dramatic approaches was that taken in 1969 by Emerson Fittipaldi (b 1946) who would later twice win both the Formula One World Championship and the Indianapolis 500.

The Fittipaldi 3200

Team Fittipaldi in late 1969 entered the Rio 1000km at the Jacarepagua, intending to run a prototype with an Alfa Romeo engine but after suffering delays in the fabrication of some parts, it was clear there would be insufficient time to prepare the car.  No other competitive machine was immediately available so the decision was taken to improvise and build a twin-engined Volkswagen Beetle, both car and engines in ample supply, local production having begun in 1953.  On paper, the leading opposition (Alfa Romeo T33s, a Ford GT40 and a Lola T70 was formidable but the Beetle, with two tuned 1600 cm³ (98 cubic inch) engines, would generate over 400 horsepower in a car weighing a mere 407kg (897 lb) car.  Expectations weren't high and other teams were dismissive of the threat yet in qualifying, the Beetle set the second fastest time in qualifying and in the race ran at the front of the field, for some time second to the leading Alfa Romeo T33 until a broken gearbox forced retirement.

Fittipaldi 3200, Interlagos, 1969.  The car competed on Pirelli CN87 Cinturatos tyres which was an interesting choice but gearbox failures meant it never raced long enough for their durability to be determined.

The idea of twin-engined cars was nothing new, Enzo Ferrari (1898-1988) in 1935 having entered the Alfa Romeo Bimotor in the Grand Prix held on the faster circuits.  At the time a quick solution to counter the revolutionary new Mercedes-Benz and Auto-Union race cars, the Bimotor had one supercharged straight-eight mounted at each end, both providing power to the rear wheels.  It was certainly fast, timed at 335 km/h (208 mph) in trials and on the circuits it could match anything in straight-line speed but its Achilles heel was that which has beset most twin-engined racing cars, high fuel consumption & tyre wear and a tendency to break drive-train components.  Accordingly, while the multi-engine idea proved effective when nothing but straight line speed was demanded (such as land-speed record (LSR) attempts), in event when corners needed to be negotiated, it proved a cul-de-sac.

Still, in 1969, Team Fittipaldi had nothing faster available and while on paper, the bastard Beetle seemed unsuited to the task as the Jacarepagua circuit then was much twistier than it would become, it would certainly have a more than competitive  power to weight ratio, the low mass likely to make tyre wear less of a problem.  According to Brazilian legend, in the spirit of the Q&D (quick & dirty) spirit of the machines hurried assembly, after some quick calculation on a slide-rule, the design process moved rapidly from the backs of envelopes to paper napkins at the Churrascaria Interlagos Brazilian Barbecue house.  Most of the chassis was fabricated against chalk-marks on garage floor while the intricate linkages required to ensure the fuel-flow to the four Weber DC045 carburetors were constructed using cigarette packets as templates to maintain the correct distance between components.  In the race, the linkages performed faultlessly.

Fittipaldi 3200: The re-configuration of the chassis essentially transformed the rear-engined Beetle into a mid-engined car, the engines between the driver and the rear-axle line, behind which sat the transaxle.  

The chassis used a standard VW platform, cut just behind the driver’s seat where a tubular sub-frame was attached.  The front suspension and steering was retained although larger Porsche drum brakes were used in deference to the higher speeds which would be attained.  Remarkably, Beetle type swing axles were used at the rear which sounds frightening but these had the advantage of providing much negative camber and on the smooth and predictable surface of a race-track, especially in the hands of a race-driver, their behavior would not be as disconcerting as their reputation might suggest.  Two standard 1600cm³ Beetle engines (thus the 3200 designation) were fitted for the shake down tests and once the proof-of-concept had been verified, they were sent for tuning, high-performance Porsche parts used and the displacement of each increased to 2200cm³ (134 cubic inch).  The engines proved powerful but too much for the bottom end, actually breaking a crankshaft (a reasonable achievement) so the stroke was shortened, yielding a final displacement just slightly larger than the original specification.

Fittipaldi 3200 (1969) schematic (left) and Porsche 908/01 LH Coupé (1968–1969) (right): The 3200's concept of a mid-engined, air-cooled, flat-eight coupe was essentially the same as the Porsche 908 but the Fittipaldi 3200's added features included drum brakes, swing axles and a driver's seat which doubled as a fuel tank.  There might have been some drivers of the early Porsche 917s who would have thought the 3200 "too dangerous".

The rear engine was attached in a conventional arrangement through a Porsche five-speed transaxle although first gear was blanked-off (shades of the British “sports saloons” of the 1950s) because of a noted proclivity for stripping the cogs while the front engine was connected to the rear by a rubber joint with the crank phased at 90^o to the rear so the power sequenced correctly.  Twin oil coolers were mounted in the front bumper while the air-cooling was also enhanced, the windscreen angled more acutely to create at the top an aperture through which air could be ducted through flexible channels in the roof.   Most interesting however was the fuel tank.  To satisfy the thirst of the two engines, the 3200 carried 100 litres (26.4 (US) / 22 (Imperial) gallons) of a volatile ethanol cocktail in an aluminum tank which was custom built to fit car: It formed the driver’s seat!

Incongruity: The Beetle and the prototypes, Interlagos, 1969 

In the Rio de Janeiro 1000 kilometre race on the Guanabara circuit, the 3200, qualified 2^nd and ran strongly in the race, running as high as second, the sight of a Beetle holding off illustrious machinery such as a Porsche special, a Lola-Chevrolet R70, and a Ford GT40, one of motorsport’s less expected events.  Unfortunately, in the twin-engined tradition, it proved fast but fragile, retiring with gearbox failure before half an hour had elapsed.  It raced once more but proved no more reliable.

How to have fun with a Beetle.

Penthouse

Penthouse (pronounced pent-hous)

(1) An apartment or dwelling on the roof of a building, usually set back from the outer walls.

(2) Any specially designed apartment on an upper floor, especially the top floor, of a building.

(3) A structure on a roof for housing elevator machinery, a water tank etc.

(4) Any roof-like shelter or overhanging part.

(5) In Real Tennis, a corridor having a slanted roof and projecting from three walls of the court.

(6) As mechanical penthouse, a floor, usually directly under a flat-roof, used to house mechanical plant & equipment.

(7) A special-interest magazine, aimed at a mostly male audience and published in several editions by a variety of owners since 1965.

1520–1530: Despite the appearance penthouse is not a portmanteau (pent + house) word.  Penthouse is an alteration (by folk etymology) of the Middle English pentis, pentiz & pendize (and other spellings), from the Old French apentiz & apentis (appendage, attached building), the construct being apent (past participle of apendre (to hang against)) + -iz (the French -is ) from the unattested Vulgar Latin –ātīcium (noun use of neuter of the unattested –ātīcius, the construct being the Latin -āt(us) (past participle suffix) + -īcius (the adjectival suffix)).  Old French picked up apentis from the Medieval Latin appendicium (from the Classical Latin appendo (to hang) & appendere (to hang from).  A less common alternative variant to describe a shed with a sloping roof projecting from a wall or the side of a building was pentice.  Penthouse is a noun; the noun plural is penthouses.

1965 Iso Grifo Bizzarini A3/C, Le Mans, 1965.

One of the most admired of the trans-Atlantic hybrids of the post-war years (1945-1973) which combined elegant coachwork, (hopefully) high standards of craftsmanship and the effortless, low-cost power of large-capacity American V8 engines, the Iso Grifo was produced between 1965-1974 by the Italian manufacturer Iso Autoveicoli.  Styled by Bertone’s Giorgetto Giugiaro (b 1938) with engineering handled by the gifted Giotto Bizzarrini (b 1926), the Grifo initially used a 327 cubic inch (5.3 litre) version of the small-block Chevrolet V8, coupled with the equally ubiquitous Borg-Warner four & five speed manual gearbox or robust General Motors (GM) automatics.  Later, after some had been built with the big-block Chevrolet V8, GM began to insist on being paid up-front for hardware so Iso negotiated with the more accommodating Ford Motor Company and switched to 351 cubic inch (5.8 litre) versions of their 335 (Cleveland) engine.

1955 Iso Isetta.

Iso was already familiar with the mechanical configuration, production of their Rivolta coupe, equipped also with the Chevrolet 327, having begun in 1962.  The Rivolta, let alone the Grifo was quite a change of direction for Iso which until then had produced a variety of appliances, scooters & moto-cycles, it’s most famous product the Isetta, one of the generation of “bubble cars” which played such a part in putting Europeans back on (three or four) wheels during the re-construction of the post-war years.  Surprisingly, despite the prominence of the Isetta name and the Italian association, barely a thousand were actually manufactured by Iso, the overwhelming majority produced in many countries by BMW and others to which the a license was granted.  Powered by tiny two and four-stroke engines, their popularity waned as “real” cars such as the Fiat 500 (1955) and later the Mini (1959) emerged; although costing little more than the bubble cars, they offered more space, performance and practicality.  By the early 1960s, the bubble cars were driven almost extinct but, as a tiny specialized niche, they never completely vanished and the Isetta is enjoying a twenty-first century revival as model urban transportation, including the option of electric propulsion.

1968 Iso Rivolta.

The Rivolta was thus quite a jump up-market and, while the engine wasn't the bespoke thoroughbred found in a Ferrari or Aston-Martin, the rest of the specification justified the high price.  Unlike some of the British interpretations using American V8s, Iso insisted on modernity, the platform probably the best of the era, the body welded to a pressed-steel chassis, a combination which proved both light and stiff.  Just as importantly, given the high rate of corporate failure among those attracted to this potentially lucrative market, it was cost-effective to manufacture, reliable and easy to service.  Probably the feature which let it rank with the most accomplished of the era was the sophisticated de Dion rear suspension which, combined with four wheel disc brakes, lent it a rare competence.  The de Dion design was not an independent arrangement but certainly behaved as if it was and, despite what Mercedes-Benz claimed of their beloved swing-axles, was superior to many of the independent setups on offer.  A noted benefit of the de Dion system is it ensures the rear wheels remain always parallel, quite an important feature in an axle which has to transmit to the road the high torque output of a big V8, a lesson Swiss constructor Peter Monteverdi (1934–1998) applied later in the decade when he went into production using even bigger engines.  Iso, with a solid base in accounting and production-line economics, ran an efficient and profitable operation not beset by the recurrent financial crises which afflicted so many and the elegant Rivolta was a success, remaining available until 1970.  Some eight hundred were sold.

1967 Iso Grifo Series One.

The Rivolta’s platform proved adaptable.  In 1965, Iso released the Grifo coupé, more overtly oriented to outright performance and strictly a two-seater.  With lovely lines and a modified version of the Rivolta’s fine chassis, the Grifo was another product of the fertile imaginations of Giugiaro & Bizzarrini but, in something not untypical in Italian industry of the time, the relationship between the latter and Iso’s founder Renzo Rivolta (1908–1966) soon became strained and was sundered.  Bizzarrini would go on to do remarkable things and Iso’s engineers assumed complete control of the Grifo after the first few dozen had been completed.  Bizzarrini had pursued a twin-stream development, a competition version called the A3/C with a lower, lightweight aluminum body as well as the road-going A3/L and when he decamped, he took with him the A3/C, to be released also under his name while Iso devoted its attentions to the A3/L, again using engine-transmission combinations borrowed from the Corvette.

1964 Iso Grifo Spider.

The Grifo weighed a relatively svelte 1430 kg (3153 lbs) in what must have been a reasonably slippery shape because the reports at the time confirmed some 240 km/h (150 mph) was easily attained, an increase on that managed by the Corvette and, when configured with the taller gearing the factory offered, the factory claimed 260 km/h (162 mph), was possible.  A test in the UK in 1966 almost matched that with a verified 161 mph (259 km/h) recorded and two year later, the US publication Car & Driver 1968 tested a 327 Grifo but didn't to a top-speed run, instead estimating 157 mph (253 km/h) should be possible given enough road.  There were surprisingly few variations, fewer than two-dozen made with a targa-style removable roof panel and a single, achingly lovely roadster was displayed on Bertone's stand at the 1964 Geneva Motor Show; it remained a one-off although a couple of coupés privately have been converted.

1970 Iso Grifo Series Two.

The bodywork was revised in 1970, subsequent cars listed as series two models.  The revisions included detail changes to the interior, improvements to the increasingly popular air-conditioning system and some alterations to the body structure, the hydraulics and the electrical system, most necessitated by new regulatory requirements by some European countries but required mostly in an attempt to remain compliant with the more onerous US legislation.  The most obvious change was to the nose, the headlamps now partially concealed by flaps which raised automatically when the lights were activated.  Presumably the smoother nose delivered improved aerodynamics but the factory made no specific claims, either about performance or the drag co-efficient (CD) number.

1972 Iso Lele & 1972 Iso Fidia.

In 1972, an unexpected change in the power-train was announced.  After almost a decade exclusively using Chevrolet engines, Iso issued a press release confirming that henceforth, the series two Grifo would be powered by Ford’s 351 cubic inch (5.8 litre) 335 series (Cleveland) V8.  In the state of tune chosen by the factory (essentially the same as fellow Italian specialist De Tomaso were using in their mid-engined Pantera), the Ford engine was similar in size, weight to the small-block Chevrolet and delivered similar power and torque characteristics so the driving experience differed little although there were 22 high-performance Leles using a tuned 351, all with a ZF five-speed manual gearbox.  The other improvement in performance was presumably Iso’s balance sheet.  The switch had been made because internal policy changes at GM meant they were now insisting on being paid up-front for their product whereas Ford was still prepared to offer an invoice with a payment term.  The change extended to the other models in the range, the Lele coupé and Fidia saloon and while the Chevrolet/Ford split in the Lele was 125/157, the circumstances of the time meant that of the 192 Fidias made, only 35 were fitted with the 351.

1969 Iso Grifo 7 Litre (427).

One of the trends which made machines of the 1960s so memorable was a tendency never to do in moderation what could be done in excess.  In 1968, Iso announced the Grifo 7 Litre, built following the example of the US manufacturers who had with little more than a pencil and the back of an envelope worked out the economics of simple seven litre engines were more compelling than adding expensive components like overhead camshafts and fuel-injection to five litre engines.  Petrol was, of course, cheap and limitless.  Petrol actually wasn’t as cheap in Italy or the rest of Europe but Iso’s target market for the Grifo was those who either could afford the running costs or (increasingly) paid their bills with other people’s money (OPM) so fuel consumption wasn’t something often considered.  The new version used a 427 cubic inch (7.0 litre) version of the big-block Chevrolet V8, bigger and heavier than the 327 so the driving characteristics of the nose-heavy machine were changed but contemporary reports praised the competence of the chassis, the de Dion rear-end notably superior in behavior compared with the Corvette’s independent rear suspension although some did note it took skill and often a sense of restraint, effectively to use the prodigious power.  Tellingly, the most receptive market for the Grifos, small and big-block, was the Federal Republic of Germany (FRG, the old West Germany) with its network of highways without the tiresome speed limits elsewhere imposed and (even in Italy), often enforced.  The autobahn really was the Grifo's native environment.   

1970 Iso Grifo Can Am (454).

Faster it certainly was although the factory’s claim of a top speed of 186 mph (a convenient 300 km/h) did seem optimistic to anyone with a slide-rule and there appears not to be any record of anyone verifying the number although one published test did claim to have seen well over 255 km/h (150 mph) with the Grifo still "strongly accelerating" before “running out of road”.  It had by then become a genuine problem.  Gone were the happy times when testers still did their work on public roads; increased traffic volumes by the late 1960s meant the often deserted stretches of highway (in 1956 an English journalist had taken a Mercedes-Benz 300SLR Coupé to 183 mph (294 km/h) on the autobahn) were now rare but whatever the terminal velocity, nobody seemed to suggest the 7 litre Grifo lacked power.  In 1970, after Iso’s stock of the by-then out-of-production 427 were exhausted, the big-block car was re-named Can-Am and equipped instead with a 454 cubic inch (7.5 litre) version, the name an allusion to the unlimited displacement Group 7 sports car racing series run in North America in which the big-block Chevrolets were long the dominant engine.  Despite the increased displacement, power actually dropped a little because the 454 was detuned a little to meet the then still modest anti-emission regulations.

1971 Iso Grifo Can Am (454).

Unlike the 427 which breathed through three two barrel carburetors, the 454 was equipped with less intricate induction, a single four barrel and, officially, output dropped from 435 horsepower to 390 but, these were gross (SAE) numbers and Detroit’s high-performance engines in this era were rated at something around what a manufacturer thought would be acceptable (all things considered), rather than an absolutely accurate number but the 454 certainly was just a little less potent than the 427 although it's probable few owners often went fast enough to tell the difference.  What didn’t change between the 7 Litre and the Can Am was its most distinctive feature, the modification to the hood (bonnet) made to ensure the additional height of the 427's induction system could be accommodated.  The raised central section, the factory dubbed "the penthouse".

Penthouse on 1969 Iso Grifo 7 Litre (427).

Not everyone admired the stark simplicity, supposing, not unreasonably, that Giugiaro might have done something more in sympathy with its surroundings.  Critics more stern would have preferred a curvaceous scoop or bulge and thought the penthouse amateurish, an angular discordance bolted unhappily atop Giugiaro’s flowing lines  but for those brought up in the tradition of brutalist functionalism, it seemed an admirable tribute to what lay beneath.  The days of the big-block Grifo were however numbered.  In 1972, with Chevrolet no longer willing to extent credit, and Ford’s big-block (429 & 460) engines re-tuned as low-emission (for the time) units suitable for pickup trucks and luxury cars, the Can-Am was retired.  So the small-block 351 Grifo became the sole model in the range but it too fell victim to changing times, production lasting not long beyond the first oil shock in October 1973 which made petrol suddenly not only much more expensive but sometimes also scarce and the whole ecosystem of the trans-Atlantic machines became threatened and in little more than a year, Iso was one of the many dinosaurs driven extinct.  Decades later, the survivors of the 412 sold are highly desirable; fine examples of the small-block Grifos attract over US$500,000, the few dozen penthouse cars can sell for up to a million and the rare early A3/Cs for well over.

Not fans of brutalist functionalism were the Lancia-loving types at Road & Track (R&T) magazine in the US.  Late in 1974, R&T published their 1975 buyer’s guide for imported and domestically-built smaller cars (R&T neither approving of nor understanding why anyone would wish to buy a big American car) and surprisingly, there were reviews of the Grifo, Lele and Fidia although the last of these sold in the US some two years earlier had been titled as 1973 models, the company having never sought to certification to continue sales although, given nothing had been done to modify them to meet the new safety regulations, that would likely have been pointless unless the strategy was to seek a "low volume" exemption, something improbable by 1975.  The distributors had however indicated to the press all three would return to the US market in 1975, supplying publicity photographs which included a Series II "penthouse" Grifo although the big-block cars hadn't been built in Italy since 1972.  A further complication was that during 1974, Ford had discontinued production of the high-performance 351 (the "Cleveland" 335 series) V8 so it wasn't clear what power-train would have been used.  Others had the same problem, De Tomaso (which withdrew from the US market in 1974) switching to use tuned versions of the Australian-built Cleveland 351s but for Iso, the whole issue became irrelevant as the factory was closed late in 1974.  R&T's last thoughts on the penthouse appeared in the buyer's guide:

"However, the clean lines of the original Grifo have been spoiled by that terrible looking outgrowth on the hood used for air cleaner clearance.  For US$28,500 (around US$150,000 in 2024 $ although direct translation of such a value is difficult to calculate because of the influence of exchange rates), a better solution to this problem should have been found."

View from the penthouse in which Lindsay Lohan lived in 2014, W Residences, Manhattan, New York City.

Cavitation

Cavitation (pronounced kav-i-tey-shuhn)

(1) The formation of pits on a surface.

(2) In fluid dynamics, the rapid formation and collapse of vapor pockets in a flowing liquid in regions of very low pressure (associated especially with devices such as rotating marine propellers or the impellers used in pumps.

(3) Such a pocket formed in a flowing liquid; the formation of cavities in a structure.

(4) In biology, the formation of cavities in an organ (used originally to describe those appearing in lung tissue as a result of consumption (tuberculosis)).

1868: The construct was cavit(y) + -ation.  Cavity was a mid-sixteenth century borrowing from Middle French cavité or the Late Latin cavitās, from the Classical Latin cavus (hollow, excavated, concave), the construct being cav +‎-ity (the nominal suffix).  The suffix -ation was from the Middle English -acioun & -acion, from the Old French acion & -ation, from the Latin -ātiō, an alternative form of -tiō (thus the eventual English form -tion).  It was appended to words to indicate (1) an action or process, (2) the result of an action or process or (3) a state or quality.  Cavitation is a noun, cavitate, cavitated & cavitating are verbs and cavitatory & cavitatory are adjectives; the noun plural is cavitations.

The original use of cavitation dates from 1868 and appeared in the literature of human pathology, describing “the formation of cavities in the body”, especially those appearing in lung tissue as a result of consumption (tuberculosis).  The use in fluid dynamics (particularly pumps and marine engineering) emerged in circa 1895 although oral use may have predated this: the verb cavitate (to form cavities or bubbles (in a fluid)) documented since 1892 so it was either a back-formation from cavitation or the construct was cavit(y) + -ate.  The related verbs were cavitated & cavitating.  The suffix -ate was a word-forming element used in forming nouns from Latin words ending in -ātus, -āta, & -ātum (such as estate, primate & senate).  Those that came to English via French often began with -at, but an -e was added in the fifteenth century or later to indicate the long vowel.  It can also mark adjectives formed from Latin perfect passive participle suffixes of first conjugation verbs -ātus, -āta, & -ātum (such as desolate, moderate & separate).  Again, often they were adopted in Middle English with an –at suffix, the -e appended after circa 1400; a doublet of –ee.  The noun supercavitation was a creation of plasma physics and described an extreme form of cavitation in which a single bubble of gas forms around an object moving through a liquid, significantly reducing drag.  As observational technology & techniques improved, the form ultracavitation also appeared to describe instances where instances of the phenomenon meant drag tended as close to zero as was possible.

Cavitation is an interesting aspect of fluid dynamics but it’s studied because it’s something which can cause component failure in devices like the pumps used for liquid, fluid & gas which can have catastrophic consequences for both connected equipment and people in the vicinity and beyond.  Such components typically feature robust construction but cavitation is a function of sustained operation (often 24/7) at high speeds and some vulnerable parts may be heavy and the fragmentation at high velocity of a heavy, reciprocating mass is obviously a serious problem.  Technically, it’s the formation of vapour- or gas-filled cavities in a flowing liquid when tensile stress is superimposed on the ambient pressure and one novelty in the science of cavitation was in 2021 noted by researchers in an oncology laboratory.  Using a gassy, explosive bacteria to destroy cancer cells by bombardment, the strikes were observed to produce a brief sonoluminescence (in physics, the emission of short bursts of light from imploding bubbles in a liquid when excited by sound), the cavitation bubbles producing a brief flash of light as they collapsed.

In the specific case of “pump cavitation”, the problem typically occurs when a hydraulic pumps which pumps liquids suffers a partial pressure drop.  What the change in pressure can induce is the formation of air bubbles, leading to cavity creation.  Inside the pump, the pressure shift transforms the liquid into a vapor which is then converted back to liquid by the spinning impellers.  The air bubbles thus are constantly moving inside the housing and as they implode during pressure changes, the surfaces of the impeller are eroded and it’s the creation of these tiny cavities which can accumulate sufficiently to weaken the structure to the point of failure.  The issue particularly affects centrifugal pumps but can occur in submersible devices.

Lindsay Lohan enjoying the effects of fluid dynamics.

Although something identified by engineers in the nineteenth century, the exact nature of cavitation wasn’t fully understood until the application in the 1950s of high-speed photography and the mathematical models developed then were later confirmed as close to exactly correct by computer simulations later in the century.  What was found was two causes of cavitation : (1) Inertial Cavitation in which a shock wave is produced by the collapse of bubble or void present in a liquid and (2) Non-inertial Cavitation which is initiated when a bubble in a fluid undergoes shape alterations due to an acoustic field or some other form of energy input.  Also observed were two behaviors of cavitation: (1) Suction Cavitation induced by high vacuum or low-pressure conditions which reduce the flow of fluid, bubbles forming near the eye of an impeller eye; as these bubbles move towards the pump’s discharge end, they are compressed into liquid, and they will implode against the impeller’s edge and (2) Discharge Cavitation which occurs when the pump’s discharge pressure becomes abnormally high, altering the flow of fluid, leading to internal recirculation, the liquid becoming “stuck” in a pattern between the housing (and the impeller) thereby creating a vacuum which in turn creates the air bubbles which will collapse and cavitate the impeller.

Representation of fluid dynamics under specific resonant conditions.

In fluid dynamics, a flow becoming “stuck” is often something to avoid but an aspect of the behavior can be exploited and it was a specific instance of certain “resonant conditions” Chrysler’s engineers exploited in 1959 when designing their Sonoramic induction system.  The idea wasn’t new, the math explained as early as 1863 and in racing cars it had been used for years but what Chrysler did was make it a focal point.  Sonoramic was an implementation of Sir Isaac Newton's (1642–1727) first law of motion, more commonly known as the law of inertia: “An object at rest tends to stay at rest and an object in motion tends to stay in motion” and it’s the second part which was exploited.  During the intake cycle of an engine, the fuel-air mix flows through the intake manifold, past the intake valve, and into the cylinder, then the intake valve shuts.  At that point, the law of inertia comes into play: Because the air was in motion, it wants to stay in motion but can’t because the valve is shut so it piles up against the valve with something of a concertina effect.  With one piece of air piling up on the next, the air becomes compressed and this compressed air has to go somewhere so it turns around and flows back through the intake manifold in the form of a pressure wave.  This pressure wave bounces back and forth in the runner and if it arrives back at the intake valve when the valve opens, it’s drawn into the engine.  This bouncing pressure wave of air and the proper arrival time at the intake valve creates a low-pressure form of supercharging but for this to be achieved all variables have to be aligned so the pressure wave arrives at the intake valve at the right time.  This combination of synchronized events is known as the “resonant conditions”.

Representation of cavitation in mechanical gears.

The behavior in pumps is now well understood and both design parameters and maintenance schedules are usually cognizant of cavitation and its potential consequences.  However, instances remain not infrequent, especially when pumps are fitted into systems by non-specialists, the most common causes being (1) low fluid pressure, (2) insufficient internal diameter of suction pipes, (3) excessive distances between a fluid source and a pump’s impeller(s), (4) pumps being run at too high a speed (which may be within a manufacturer’s recommendations but inappropriate for the system in which it’s installed), (5) too many fittings added to a suction pipe and (6) debris intrusion (often a consequence of inadequate filter cleaning & maintenance).  Cavitation is a function of speed and in devices such as slow-speed propellers (such as those in many marine applications), cavitation is not an issue, thus the frequent use of light, efficient, thin blades.