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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.
Honda began their first 50 cc GP season with the RC110, announced at the Japanese Motor Show in 1961. Powered by a single cylinder, four-valve engine, and with gear driven double overhead cams, giving about 9 hp (6.7 kW) at 14,000 rpm.
The engine in the Aprilia SX 50 is sourced from Derbi/Piaggio (D50B0/D50B1). This engine is used in the Derbi Senda DRD/X-Race/X-Treme supermotos and crossers, as well as the 2006 onwards Derbi GPR 50 and Aprilia RS 50 road bikes, although the road bikes feature an electric starter instead of a kickstarter on the supermotos.
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. [15] [failed verification] In 2023 a group of engineers modified a dynamometer to be able to measure how much power a horse can produce. This horse was measured to 5.7 hp (4.3 kW). [16]
For their Ultra-Lightweight class (50 cc) Grand Prix race bikes during the 1964, 1965 and 1966 race seasons, Honda re-introduced the 1920s format of cable-actuated caliper rim brakes with shoes/blocks directly acting on the aluminium rim-sides (alloy wheel rim), creating almost a 'consumable' item from the wheels, but dispensing with heavy ...
250 kW 335 hp 0.83 kW/kg 0.50 hp/lb SAI GM3 radial piston hydraulic motor [49] 15 kg 33 lb 15 kW 20 hp 1 kW/kg 0.61 hp/lb Denison GOLD CUP P14 axial piston hydraulic motor [50] 110 kg 250 lb 384 kW 509 hp 3.5 kW/kg 2.0 hp/lb Denison TB vane pump [51] 7 kg 15 lb 40.2 kW 53.9 hp 5.7 kW/kg 3.6 hp/lb
The Yamaha PW50 is a commercially available two-stroke 50 cc (3.1 cu in) mini dirt bike, designed, developed and produced by Japanese manufacturer Yamaha since 1980. [ 7 ] [ 8 ] [ 9 ] References
or 1.6/π = 0.51 times engine displacement in cc The limits between the horsepower denominations were drawn at either 0.49, 0.50, or 0.51 in different cantons. Thus, the eight horsepower category would cover cars of about 7.5–8.5 CV. In 1973 Berne switched to a taxation system based on vehicle weight, and a few other cantons followed.