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Horsepower ( hp ) 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.

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44-466: For the chocolate bar, see Cailler . Branche or la Branche is a surname. Notable people with the surname include: Alcée Louis la Branche (1806–1861), American politician George Branche (born 1953), Sierra Leonean middle-distance runner Derrick Branche (born 1947), British actor Stanley Branche (1933–1992), American civil rights activist See also [ edit ] Coudekerque-Branche ,

88-415: 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

132-758: A 44-metre fall. In 1912, was inaugurated the Bulle-Broc-Fabrique railway , which replaced horse-drawn goods convoys to Bulle , the major town in the area. Chocolate, notably including milk chocolate using milk from local dairies, began to be produced on a massive scale. A foreman who previously worked for Daniel Peter helped Cailler develop this new type of chocolate, which would become particularly successful. The number of workers grew from 76 in 1898 to 630 in 1901. The number of workers peaked in 1930, at 1796. Meanwhile, in 1904, Daniel Peter and Charles-Amédée Kohler (son of Charles-Amédée Kohler who founded Chocolat Kohler in 1830) became partners and founded

176-672: A brand. Cailler is the oldest chocolate brand still in existence in Switzerland. François-Louis Cailler was born in Vevey , Switzerland in 1796. Together with Abram L. C. Cusin, Cailler first opened a grocery shop in Vevey in 1818, where chocolate was also sold. At that time, chocolate was essentially considered as a tonic rather than a delicacy, and transport of raw ingredients was slow and difficult. Cailler soon opened his first chocolate factory in neighbouring Corsier-sur-Vevey in 1819. It

220-539: A commune of Nord department, France Branch (disambiguation) [REDACTED] Surname list This page lists people with the surname Branche . If an internal link intending to refer to a specific person led you to this page, you may wish to change that link by adding the person's given name (s) to the link. Retrieved from " https://en.wikipedia.org/w/index.php?title=Branche&oldid=1141663771 " Category : Surnames Hidden categories: Articles with short description Short description

264-486: A few decades, invent milk chocolate . In 1898, Alexandre-Louis Cailler (grandson of François-Louis Cailler) opened the current factory of Broc. The following year, the dedicated hydroelectrical plant on the Jogne was commissioned, allowing the electrification of the entire village of Broc. The waters of the Jogne had been diverted by means of a one-kilometre-long tunnel, allowing an electrical production of 2000 HP through

308-429: 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

352-530: 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

396-420: 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,

440-524: Is considered one of the first modern chocolate factories. The factory allowed Cailler to produce solid and affordable chocolate, that was moulded into tablets or small blocks . Cailler was successful and, after a few years, he proposed sixteen different sorts of chocolate with different packagings. Among popular products were pur caraque and commun sucré , which were also exported outside Switzerland. Vanilla and cinnamon flavoured chocolate bars were also made by Cailler. Chocolate production increased with

484-492: Is different from Wikidata All set index articles Cailler Cailler is a Swiss chocolate brand and production factory based in Broc . It was founded in Vevey by François-Louis Cailler in 1819 and remained independent until the early 20th century, when it associated with other producers. Shortly before, Cailler opened its main factory at Broc in 1898. The company was finally bought by Nestlé in 1929 and became

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528-463: 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

572-454: 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

616-484: 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

660-573: Is located in the canton of Fribourg , in the Alpine foothills of the Gruyères region, which is the cradle of Gruyère and reputed for its fine milk production. Its chocolates are produced at Maison Cailler. The factory complex is located north of Broc , on the Jogne river, near its mouth in the Lake of Gruyère . The complex has a dedicated railway station, Broc-Fabrique, which is connected to Bulle via

704-465: 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

748-507: 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

792-434: 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

836-513: 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

880-743: 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

924-466: The Bulle–Broc railway line , an originally narrow-gauge line later converted to a standard gauge in 2023. Maison Cailler educates visitors on the history of the brand, ingredient sourcing, and the artistry of chocolate-making — visitors are allowed to try chocolates in the tasting room at the end of tours. The factory is open seven days a week and accommodates visits in twelve languages. Activities beyond

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968-515: The Chokito (since 1964). In 2018, production of Chokito (and Rayon) was relocated elsewhere in Switzerland. Horse power The term 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

1012-551: The Société générale suisse des chocolats Peter et Kohler réunis . in 1911, the company created by Peter and Kohler merged with Cailler. In 1929, Peter, Cailler, Kohler, Chocolats Suisses S.A. finally merged with the Nestlé group. Until 1951, Nestlé used all three names Peter Cailler Kohler for its chocolates, which were then commonly referred to as the PCK brand. Nestlé ultimately retained

1056-781: 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) ,

1100-501: 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 ,

1144-509: The Branche. Cailler produces also praline boxes , the oldest being Ambassador (since 1890) and Fémina (1902). Several Cailler products, especially the Branche, are imitated by other producers, for instance by the other Swiss brand Frey . Below are listed the most notable Cailler-branded products: Other chocolate bar brands have been produced by Nestlé at the Cailler factory, such as

1188-549: The Cailler brand and signature for the chocolate made in Broc. In 2006, Cailler packaging was revamped under the leadership of Nelly Wenger (head of Expo.02 ). New transparent plastic boxes were designed by architect Jean Nouvel (also involved in Expo.02). The change was met with criticism and, following price increases, Cailler products were boycotted by some retailers. In 2007, the plastic packaging has been discontinued. Cailler

1232-861: 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) ,

1276-667: 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

1320-666: 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

1364-530: 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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1408-499: 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

1452-454: 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

1496-485: The museum include: chocolate workshops, an escape game and an outdoor playground. The "Chocolate Train", operated by the Montreux–Lenk im Simmental line , connects Montreux to the factory. An additional theme park dedicated to chocolate is planned for 2025. Cailler produces a wide range of 100 g and 200 g chocolate tablets, essentially milk but also dark and white. It also produces individual chocolate bars, notably

1540-610: The opening of two other factories in Corsier and Vevey in 1832 and 1840. The factories were located on the Canal de la Monneresse and were water powered. François-Louis Cailler died in 1852 and his wife Louise-Albertine continued to run the company along with their sons, Auguste and Alexandre. In 1861, one of the Cailler factories at Rue des Bosquets was sold to François-Louis Cailler’s son-in-law: Daniel Peter . There, Peter would establish his own independent chocolate company and, after

1584-512: 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

1628-670: 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

1672-423: 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

1716-502: 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

1760-685: The unit varied among geographical regions. Most countries now use the SI unit watt for measurement of power. With 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

1804-609: Was 12 feet (3.7 m) in radius; therefore, the horse travelled 2.4 × 2π × 12 feet in one minute. Watt judged that 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

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1848-546: 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

1892-420: Was later used by James Watt to help market his improved steam engine. He had previously agreed to take royalties of one-third of 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

1936-475: 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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