There are various classifications of planes: as wings, on a chassis design, as take-off. On the speed of flight they are divided into four views. The record of speed was set by the hypersonic plane of NASA which can fly by more than 11 thousand kilometers per hour. Regular passenger planes fly with a speed about 900 kilometers per hour.
Classification of planes by speed
The first planes, to be exact, their predecessors – gliders of brothers Wright – moved with a small speed, about 50 kilometers per hour. Gradually designs of these aircraft were improved and if until recently hundreds of kilometers per hour were considered as huge speeds, then today planes can fly with a speed, the acoustic speed several times exceeding.
Distinguish subsonic, transonic, supersonic and hypersonic planes. The sound moves with a different speed depending on density and elasticity of the environment: in air it makes slightly more than 1200 kilometers per hour.
Speed of various planes
At passenger planes distinguish cruiser and maximum speed, at the same time both values do not exceed acoustic speed therefore all models are subsonic. Cruiser speed is from about 60 to 80% of maximum: so these devices with passengers onboard fly, they seldom disperse to a maximum. At different types of passenger planes various cruiser speed. So, Tu-134 flies by about 880 kilometers per hour, Il-86 – 950, Boeing from 910 to 940. The maximum speed of the fastest passenger plane is about 1030 kilometers per hour: anyway it is less than the acoustic speed, but it is already close to it. There are projects of passenger transonic planes: for example, Boeing Sonic Cruiser had to become it, but this project was not finished. Today it is forbidden to fly to the USA with such speed, in Europe it is possible if the device does not make sound blow. Also earlier two passenger planes flying with acoustic speed functioned: Tu-144 (worked till 1978) and "Concorde" (left operation in 2003). Speed of tranzvukovy planes is equal to acoustic speed, and supersonic – surpasses it. Such planes generally are military: these are fighters, intelligence agents, interceptors, bombers. To the same speeds spaceships accelerate. It is still a little hypersonic planes, their speed surpasses acoustic speed by 8-9 times. The fastest of them – NASA X-23A which disperses up to 11230 kilometers per hour. The first similar device appeared in the 60th years in the USA and made subspace flights. Actually, it is spaceships, and it is possible to call their pilots astronauts if they rise above space border, that is by 100 kilometers.