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By definition, at Mach 1, the local flow velocity u is equal to the speed of sound. At Mach 0.65, u is 65% of the speed of sound (subsonic), and, at Mach 1.35, u is 35% faster than the speed of sound (supersonic). An F/A-18 Hornet creating a vapor cone at transonic speed just before reaching the speed of sound.
A Suzuki GSX-R1000 at a drag strip – a 2006 model once recorded a 0 to 60 mph time of 2.35 seconds. This is a list of street legal production motorcycles ranked by acceleration from a standing start, limited to 0 to 60 mph times of under 3.5 seconds, and 1 ⁄ 4-mile times of under 12 seconds.
Even with its limitations, the H2 was a success, because there were not many other bikes that could, Brown said, "even approach" the performance of the H2 Mach IV. [7] A standard, factory produced H2 was able to travel a 1 ⁄ 4 mi (0.40 km) from a standing start in as low as 12.0 seconds with an expert rider on board.
The fastest automobile in 2015 was the Porsche 918 Spyder, which is a hybrid vehicle that takes 2.2 seconds to accelerate from 0 to 60 mph. [2] [3] In June 2021, the Tesla Model S Plaid was measured to accelerate from 0 to 60 mph in 1.98 seconds, not including first foot of rollout. [4]
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Mach number is more useful, and most high-speed aircraft are limited to a maximum operating Mach number, also known as M MO. For example, if the M MO is Mach 0.83, then at 9,100 m (30,000 ft) where the speed of sound under standard conditions is 1,093 kilometres per hour (590 kn), the true airspeed at M MO is 906 kilometres per hour (489 kn).
Because the speed of sound increases with air temperature, and air temperature generally decreases with altitude, the true airspeed for a given Mach number generally decreases with altitude. [2] As an airplane moves through the air faster, the airflow over parts of the wing will reach speeds that approach Mach 1.0.
60.0 mm × 58.8 mm (2.36 in × 2.31 in) Compression ratio: 6.8:1: Transmission: Chain driven 5-speed, manual: Suspension: Inner spring telescopic front fork, three-position spring preloaded adjustable shock absorber and swing arm (rear) Fuel capacity: 13.9 L (3.1 imp gal; 3.7 US gal) Related: Kawasaki S1 Mach I, Kawasaki S2 Mach II, Kawasaki H2 ...