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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 electric horsepower "hpE" is exactly 746 watts, while the boiler horsepower is 9809.5 or 9811 watts, depending on the exact year.
A typical turbocharged V8 diesel engine might have an engine power of 250 kW (340 hp) and a mass of 380 kg (840 lb), [1] giving it a power-to-weight ratio of 0.65 kW/kg (0.40 hp/lb). Examples of high power-to-weight ratios can often be found in turbines.
Engine power is the power that an engine can develop. 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.
Normal human metabolism produces heat at a basal metabolic rate of around 80 watts. [1] During a bicycle race, an elite cyclist can produce around 440 watts of mechanical power over an hour and track cyclists in short bursts over 2500 watts; modern racing bicycles have greater than 95% mechanical efficiency. An adult of good fitness is more ...
For reference, about 10,000 100-watt lightbulbs or 5,000 computer systems would be needed to draw 1 MW. Also, 1 MW is approximately 1360 horsepower . Modern high-power diesel-electric locomotives typically have a peak power of 3–5 MW, while a typical modern nuclear power plant produces on the order of 500–2000 MW peak output.
99 units produced per month [24] Czinger 21C: 2021 919 kW (1,232 hp; 1,249 PS) Hybrid electric: 80 units to be produced [25] Hyptec SSR Ultimate/Aion Hyper SSR Ultimate 2023 913 kW (1,225 hp; 1,242 PS) Electric: Drako GTE: 2020 895 kW (1,200 hp; 1,217 PS) Electric: 25 units produced Lucid Air Sapphire 2023 895 kW (1,200 hp; 1,217 PS) Electric
The dimension of power is energy divided by time. In the International System of Units (SI), the unit of power is the watt (W), which is equal to one joule per second. Other common and traditional measures are horsepower (hp), comparing to the power of a horse; one mechanical horsepower equals about 745.7 watts.
The specific power may be expressed in watts per kilogram of body mass. Active cyclists can produce from 1.0 W/kg (novice female) 2.2 W/kg (average untrained male), 3.0 W/kg (male, fair or female, good [fitness]), and 6.6 W/kg (top-class male athletes) at their functional threshold power (about one hour). 5 W/kg is about the level reachable by ...