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48-664: In 1957 Autobianchi produced the Bianchina , an upmarket version of the Fiat 500 , and the Primula small family car . Offered both as a fastback saloon and hatchback , the 1964 Primula was Fiat's first front-wheel drive production car. It had pioneered the transverse-engined front-wheel drive layout with the transmission and clutch to the left of the engine, which today is almost universally used on front-wheel drive cars. The brainchild of Dante Giacosa this mechanical layout had been developed for

96-507: A four-leaf clover decal on the left side. The car is known for its tendency to become badly damaged throughout these stories. In the animation film Despicable Me 2 , the car of Lucy Wilde resembles a Bianchina Trasformabile. The car is owned and driven by Lolita Lobosco in the eponymous Italian detective series broadcast in the UK by Channel 4 in its Walter Presents series (S1 E2, 01:01:30). Horsepower#SAE gross Horsepower ( hp )

144-643: A transversely mounted engine . The Fiat type 124 BLC.000 1.4-litre overhead valve four-cylinder unit was the same installed on the Fiat 124 Special and on the Autobianchi Primula Coupé S; The four-cylinder had a displacement of 1,438 cubic centimetres, a bore and stroke of 81 and 71.5 mm, and a compression ratio of 9.3:1. Fed by a twin-choke downdraught Weber 32 DFB carburettor , it produced 70 PS DIN (51 kW; 69 hp) – 75 PS SAE – at 5,400 rpm, and 108 N⋅m DIN (80 lb⋅ft) at 3,000 rpm. The engine

192-415: A ' brewery horse ' could produce 32,400 foot-pounds [43,929 J] per minute." James Watt and Matthew Boulton standardized that figure at 33,000 foot-pounds (44,742 J) per minute the next year. A common legend states that the unit was created when one of Watt's first customers, a brewer, specifically demanded an engine that would match a horse, and chose the strongest horse he had and driving it to

240-501: A fixed B-pillar and partial roof, like the rest of the opening was covered with a foldable fabric hood, while the Cabriolet version had no B-pillar. The Trasformabile was the only version to feature suicide doors , and in 1962, it was replaced by a four-seat saloon. The engine and chassis were the same in both. In 1965, a minor facelift was made and in the Berlina, the regular engine gained

288-429: A group of engineers modified a dynometer to be able to measure how much horsepower a horse can produce. This horse was measured to 5.7 hp (4.3 kW). When torque T is in pound-foot units, rotational speed N is in rpm , the resulting power in horsepower is The constant 5252 is the rounded value of (33,000 ft⋅lbf/min)/(2π rad/rev). When torque T is in inch-pounds, The constant 63,025

336-650: A half horsepower. In France, the various Bianchina models were sold under different names: the Berlina became the Lutèce , the Familiare the Texane , and the Cabriolet was marketed as the Eden Roc . The Bianchina was produced from 1957 to 1970, for a total volume of approximately 275,000. Source: Club Bianchina and Bianchina Classic Club Autobianchi also used the Bianchina name for

384-526: A healthy human can produce about 1.2 hp (0.89 kW) briefly (see orders of magnitude ) and sustain about 0.1 hp (0.075 kW) indefinitely; trained athletes can manage up to about 2.5 hp (1.9 kW) briefly and 0.35 hp (0.26 kW) for a period of several hours. The Jamaican sprinter Usain Bolt produced a maximum of 3.5 hp (2.6 kW) 0.89 seconds into his 9.58 second 100-metre (109.4 yd) sprint world record in 2009. In 2023

432-452: A new three-box saloon. According to Giacosa's memoirs, Ghiretti feared competition from the upcoming front-wheel drive Fiat 128 small family car (at the time still known as project X1/1 ) and was a proponent of conservative three-box styling , as opposed to than the Primula's current 2-box hatchback or fastback bodies. The project was authorized by Fiat management, but since Fiat's style centre

480-570: Is a minicar produced by the Italian automaker Autobianchi , based on the Fiat 500 's chassis and mechanicals. It was available in various configurations: Berlina (saloon), Cabriolet (roadster), Trasformabile (fixed profile convertible), Panoramica (station wagon), and Furgoncino (van). The car was presented to the public on 16 September 1957 at the Museum of Science and Technology in Milan. Initially,

528-400: Is a unit of measurement of power , or the rate at which work is done, usually in reference to the output of engines or motors. There are many different standards and types of horsepower. Two common definitions used today are the imperial horsepower as in "hp" or "bhp" which is about 745.7 watts , and the metric horsepower as in "cv" or "PS" which is approximately 735.5 watts. The term

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576-420: Is also used in many places to symbolize brake horsepower. Drawbar power (dbp) is the power a railway locomotive has available to haul a train or an agricultural tractor to pull an implement. This is a measured figure rather than a calculated one. A special railway car called a dynamometer car coupled behind the locomotive keeps a continuous record of the drawbar pull exerted, and the speed. From these,

624-460: Is equivalent to a boiler heat output of 33,469 Btu/h (9.809 kW). Present industrial practice is to define "boiler horsepower" as a boiler thermal output equal to 33,475 Btu/h (9.811 kW), which is very close to the original and revised definitions. Boiler horsepower is still used to measure boiler output in industrial boiler engineering in the US. Boiler horsepower is abbreviated BHP, which

672-450: Is equivalent to a boiler heat output of 33,485 Btu/h (9.813 kW). A few years later in 1884, the ASME re-defined the boiler horsepower as the thermal output equal to the evaporation of 34.5 pounds per hour of water "from and at" 212 °F (100 °C). This considerably simplified boiler testing, and provided more accurate comparisons of the boilers at that time. This revised definition

720-481: Is in psi, and flow rate is in US gallons per minute. Drilling rigs are powered mechanically by rotating the drill pipe from above. Hydraulic power is still needed though, as 1 500 to 5 000 W are required to push mud through the drill bit to clear waste rock. Additional hydraulic power may also be used to drive a down-hole mud motor to power directional drilling . When using SI units, the equation becomes coherent and there

768-465: Is needed to pull a drawbar load of 2,025 pounds-force at 5 miles per hour? { P } h p = 2025 × 5 375 = 27. {\displaystyle \{P\}_{\mathrm {hp} }={\frac {2025\times 5}{375}}=27.} The constant 375 is because 1 hp = 375 lbf⋅mph. If other units are used, the constant is different. When using coherent SI units (watts, newtons, and metres per second), no constant

816-507: Is needed, and the formula becomes P = Fv . This formula may also be used to calculate the power of a jet engine, using the speed of the jet and the thrust required to maintain that speed. Example: how much power is generated with a thrust of 4000 pounds at 400 miles per hour? { P } h p = 4000 × 400 375 = 4266.7. {\displaystyle \{P\}_{\mathrm {hp} }={\frac {4000\times 400}{375}}=4266.7.} This measure

864-434: Is no dividing constant. where pressure is in pascals (Pa), and flow rate is in cubic metres per second (m ). Boiler horsepower is a boiler 's capacity to deliver steam to a steam engine and is not the same unit of power as the 550 ft lb/s definition. One boiler horsepower is equal to the thermal energy rate required to evaporate 34.5 pounds (15.6 kg) of fresh water at 212 °F (100 °C) in one hour. In

912-506: Is ordinarily stated in watts or kilowatts. In the United States, the power output is stated in horsepower which, for this purpose, is defined as exactly 746 W. Hydraulic horsepower can represent the power available within hydraulic machinery , power through the down-hole nozzle of a drilling rig , or can be used to estimate the mechanical power needed to generate a known hydraulic flow rate. It may be calculated as where pressure

960-738: Is the approximation of Assuming the third CGPM (1901, CR 70) definition of standard gravity , g n = 9.80665 m/s , is used to define the pound-force as well as the kilogram force, and the international avoirdupois pound (1959), one imperial horsepower is: Or given that 1 hp = 550 ft⋅lbf/s, 1 ft = 0.3048 m, 1 lbf ≈ 4.448 N, 1 J = 1 N⋅m, 1 W = 1 J/s: 1 hp ≈ 745.7 W The various units used to indicate this definition ( PS , KM , cv , hk , pk , k , ks and ch ) all translate to horse power in English. British manufacturers often intermix metric horsepower and mechanical horsepower depending on

1008-488: The Autobianchi Bianchina Giardiniera . The 1966 movie How to Steal a Million with Audrey Hepburn and Peter O'Toole features Hepburn's character driving a red Autobianchi Bianchina cabriolet. Italian comedy character Ugo Fantozzi , created by Paolo Villaggio and protagonist of television monologues, short stories, and films, famously drives a white Bianchina, usually somewhat damaged and with

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1056-749: The kilowatt as the official power-measuring unit in EEC directives. Other names for the metric horsepower are the Italian cavallo vapore (cv) , Dutch paardenkracht (pk) , the French cheval-vapeur (ch) , the Spanish caballo de vapor and Portuguese cavalo-vapor (cv) , the Russian лошадиная сила (л. с.) , the Swedish hästkraft (hk) , the Finnish hevosvoima (hv) ,

1104-665: The 124 and 128. Christened A111, the new car—albeit larger in size—was based on the Primula's platform and mechanicals, and used the 1.4-litre drivetrain of the most powerful Primula, the Coupé S of 1968. Size-wise, the A111 slotted between Fiat's 128 and 124 sedans, being also significantly bigger than the previously biggest Autobianchi, the said Primula. The Autobianchi A111 was introduced in April 1969, and deliveries began in May. The interior, seating four or five,

1152-501: The 1926 Iowa State Fair , they reported that the peak power over a few seconds has been measured to be as high as 14.88 hp (11.10 kW) and also observed that for sustained activity, a work rate of about 1 hp (0.75 kW) per horse is consistent with agricultural advice from both the 19th and 20th centuries and also consistent with a work rate of about four times the basal rate expended by other vertebrates for sustained activity. When considering human-powered equipment ,

1200-629: The Autobianchis became redundant. The last A111 left the production line in 1972, making the total number produced 56,984. The A111 remained without a direct replacement within the Autobianchi range, and thus the brand was reduced to a single model—the A112 upmarket supermini and its successor the Y10 , the last car to bear the Autobianchi badge. The Autobianchi A111 was a unibody front-wheel drive 4-door sedan with

1248-820: The Estonian hobujõud (hj) , the Norwegian and Danish hestekraft (hk) , the Hungarian lóerő (LE) , the Czech koňská síla and Slovak konská sila (k or ks ), the Serbo-Croatian konjska snaga (KS) , the Bulgarian конска сила , the Macedonian коњска сила (KC) , the Polish koń mechaniczny (KM) ( lit.   ' mechanical horse ' ), Slovenian konjska moč (KM) ,

1296-455: The Fiat 123 , an experimental project undertaken to test various unconventional engine and transmission layouts for a mid-sized 1100 replacement; when Fiat's management endorsed the traditionally laid out (front-longitudinal engine, rear-wheel drive) 124 instead, it had spawned the innovative Autobianchi Primula. To replace the Primula the managing director of Autobianchi, Enrico Ghiretti, desired

1344-648: The Ukrainian кінська сила (к. с.) , the Romanian cal-putere (CP) , and the German Pferdestärke (PS) . In the 19th century, revolutionary-era France had its own unit used to replace the cheval vapeur (horsepower); based on a 100 kgf ⋅m/s standard, it was called the poncelet and was abbreviated p . Tax or fiscal horsepower is a non-linear rating of a motor vehicle for tax purposes. Tax horsepower ratings were originally more or less directly related to

1392-551: The car was equipped with the smallest Fiat engine, air-cooled 479 cc, producing 15 PS (11 kW). In 1959, the engine power was increased to 16.5 PS (12.1 kW) and in 1960, the cabriolet version was launched. In the same year, the Trasformabile, whose engine cylinder capacity was increased to 499 cc and 17.5 PS (12.9 kW), was made available in a Special version with bicolour paint and an engine enhanced to 21 PS (15.4 kW). This body style featured

1440-652: The early days of steam use, the boiler horsepower was roughly comparable to the horsepower of engines fed by the boiler. The term "boiler horsepower" was originally developed at the Philadelphia Centennial Exhibition in 1876, where the best steam engines of that period were tested. The average steam consumption of those engines (per output horsepower) was determined to be the evaporation of 30 pounds (14 kg) of water per hour, based on feed water at 100 °F (38 °C), and saturated steam generated at 70 psi (480 kPa). This original definition

1488-522: The engine's bore size, number of cylinders, and a (now archaic) presumption of engine efficiency. As new engines were designed with ever-increasing efficiency, it was no longer a useful measure, but was kept in use by UK regulations, which used the rating for tax purposes . The United Kingdom was not the only country that used the RAC rating; many states in Australia used RAC hp to determine taxation. The RAC formula

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1536-499: The engine. The situation persisted for several generations of four- and six-cylinder British engines: For example, Jaguar's 3.4-litre XK engine of the 1950s had six cylinders with a bore of 83 mm (3.27 in) and a stroke of 106 mm (4.17 in), where most American automakers had long since moved to oversquare (large bore, short stroke) V8 engines . See, for example, the early Chrysler Hemi engine . The power of an engine may be measured or estimated at several points in

1584-484: The horse could pull with a force of 180 pounds-force (800 N). So: Engineering in History recounts that John Smeaton initially estimated that a horse could produce 22,916 foot-pounds (31,070 J) per minute. John Desaguliers had previously suggested 44,000 foot-pounds (59,656 J) per minute, and Thomas Tredgold suggested 27,500 foot-pounds (37,285 J) per minute. "Watt found by experiment in 1782 that

1632-637: The implementation of the EU Directive 80/181/EEC on 1 January 2010, the use of horsepower in the EU is permitted only as a supplementary unit. The development of the steam engine provided a reason to compare the output of horses with that of the engines that could replace them. In 1702, Thomas Savery wrote in The Miner's Friend : The idea was later used by James Watt to help market his improved steam engine. He had previously agreed to take royalties of one-third of

1680-450: The limit. In that legend, Watt accepted the challenge and built a machine that was actually even stronger than the figure achieved by the brewer, and the output of that machine became the horsepower. In 1993, R. D. Stevenson and R. J. Wassersug published correspondence in Nature summarizing measurements and calculations of peak and sustained work rates of a horse. Citing measurements made at

1728-505: The origin of the engine in question. DIN 66036 defines one metric horsepower as the power to raise a mass of 75 kilograms against the Earth's gravitational force over a distance of one metre in one second: 75 kg × 9.80665 m/s × 1 m / 1 s = 75  kgf ⋅m/s = 1 PS. This is equivalent to 735.49875 W, or 98.6% of an imperial horsepower. In 1972, the PS was replaced by

1776-670: The power generated can be calculated. To determine the maximum power available, a controllable load is required; it is normally a second locomotive with its brakes applied, in addition to a static load. If the drawbar force ( F ) is measured in pounds-force (lbf) and speed ( v ) is measured in miles per hour (mph), then the drawbar power ( P ) in horsepower (hp) is { P } h p = { F } l b f { v } m p h 375 . {\displaystyle \{P\}_{\mathrm {hp} }={\frac {\{F\}_{\mathrm {lbf} }\{v\}_{\mathrm {mph} }}{375}}.} Example: How much power

1824-434: The rear there was a beam axle on longitudinal semi-elliptic leaf springs, plus double-acting hydraulic dampers. Steering was by means of a rack-and-pinion mechanism positioned beneath the transverse leaf spring and behind the engine. The braking system comprised four disk brakes , front-rear split hydraulic circuits, a vacuum servo and proportioning valve on the rear axle. Bianchina The Autobianchi Bianchina

1872-413: The same design seen on the original A111. New bumpers gained rubbing strips but dispensed with the over-riders (bringing overall length to less than four metres), there was new model badging on the tail, and the interior was partly redesigned, including a new centre console and a shorter gear shifter. As the 1970s progressed, Fiat has introduced an increasing number of FWD cars under its own brand, and thus

1920-408: The savings in coal from the older Newcomen steam engines . This royalty scheme did not work with customers who did not have existing steam engines but used horses instead. Watt determined that a horse could turn a mill wheel 144 times in an hour (or 2.4 times a minute). The wheel was 12 feet (3.7 m) in radius; therefore, the horse travelled 2.4 × 2π × 12 feet in one minute. Watt judged that

1968-423: The size of the engine; but as of 2000, many countries changed over to systems based on CO 2 emissions, so are not directly comparable to older ratings. The Citroën 2CV is named for its French fiscal horsepower rating, "deux chevaux" (2CV). Nameplates on electrical motors show their power output, not the power input (the power delivered at the shaft, not the power consumed to drive the motor). This power output

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2016-502: The transmission of the power from its generation to its application. A number of names are used for the power developed at various stages in this process, but none is a clear indicator of either the measurement system or definition used. In general: All the above assumes that no power inflation factors have been applied to any of the readings. Engine designers use expressions other than horsepower to denote objective targets or performance, such as brake mean effective pressure (BMEP). This

2064-478: Was adopted in the late 18th century by Scottish engineer James Watt to compare the output of steam engines with the power of draft horses . It was later expanded to include the output power of other power-generating machinery such as piston engines , turbines , and electric motors . The definition of the unit varied among geographical regions. Most countries now use the SI unit watt for measurement of power. With

2112-422: Was already overworked, decision was taken to use a design for the dismissed project 123 . The chosen design was the most recent proposal for the transverse-engined front-wheel drive 123 E4 ; it was updated, chiefly in the front end to incorporate new rectangular headlamp lenses, and approved by Ghiretti for production. Therefore, on the outside the A111's lines unsurprisingly recalled coeval Fiat designs, especially

2160-531: Was instituted by the Royal Automobile Club and was used to denote the power of early 20th-century British cars. Many cars took their names from this figure (hence the Austin Seven and Riley Nine), while others had names such as "40/50 hp", which indicated the RAC figure followed by the true measured power. Taxable horsepower does not reflect developed horsepower; rather, it is a calculated figure based on

2208-410: Was mated to an all- synchromesh 4-speed manual transmission with floor-mounted shifter. Neither an automatic or different engine options were offered. Suspension was as on the Primula. At the front it consisted of A-arms and an upper transverse leaf spring , which doubled both as upper link and an anti-roll bar , as well as providing the attachment point for double-acting hydraulic dampers ; at

2256-567: Was rather well-appointed, with a genuine wood fascia on the dashboard, individual sliding and reclining front seats, fully carpeted floor, and cloth, cloth-and-leatherette or full leatherette upholstery. Autobianchi advertised a top speed of 155 km/h (96 mph). A lightly revised A111 was introduced at the 52nd Turin Motor Show in October/November 1970. A distinguishing feature of these "series 2" cars were double-stacked tail lamps, of

2304-470: Was sometimes applied in British colonies as well, such as Kenya (British East Africa) . where Since taxable horsepower was computed based on bore and number of cylinders, not based on actual displacement, it gave rise to engines with "undersquare" dimensions (bore smaller than stroke), which tended to impose an artificially low limit on rotational speed , hampering the potential power output and efficiency of

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