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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 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 .
Energy; system unit code (alternative) symbol or abbrev. notes sample default conversion combinations SI: yottajoule: YJ YJ 1.0 YJ (2.8 × 10 17 kWh) zettajoule: ZJ ZJ 1.0 ZJ (2.8 × 10 14 kWh)
Engine power is the power that an engine can put out. It can be expressed in power units, most commonly kilowatt, pferdestärke (metric horsepower), or horsepower.In terms of internal combustion engines, the engine power usually describes the rated power, which is a power output that the engine can maintain over a long period of time according to a certain testing method, for example ISO 1585.
See Weight for detail of mass/weight distinction and conversion. Avoirdupois is a system of mass based on a pound of 16 ounces, while Troy weight is the system of mass where 12 troy ounces equals one troy pound. The symbol g 0 is used to denote standard gravity in order to avoid confusion with the (upright) g symbol for gram.
As piston engines usually have their maximum torque at a lower rotating speed than the maximum power output, the BMEP is lower at full power (at higher rotating speed). If the same engine is rated 72 kW at 5400 min −1 = 90 s −1, and its BMEP is 0.80 MPa, we get the following equation: =
The dramatic elevation gain — which came after the pilot failed to make a turn following takeoff — likely prevented the plane from slamming into the Koʻolau mountain range on the island of ...
'Be wary:' FBI warns shoppers of holiday scams as Black Friday, Cyber Monday sales kick off Shoppers spent $11.3 million online every minute between 10 a.m. and 2 p.m., according to the sales ...
PCS—Power conversion system, electric power conversion. Plant Control System. PCT—Programmable Communicating Thermostat (electricity) PD—Preliminary Determination; PDC—Phasor data concentrator. See description in phasor measurement unit article. (electricity) PDCI—Pacific Direct Current Intertie (US) (electricity)