Speaking of the largest aircraft, many aviation fans will think of the An-225 transport aircraft developed by the former Soviet Union. It not only has a stupid mesh red face, carrying the blizzard shuttle flying heroic even more impressive. However, An-225 maintained the "biggest aircraft" record for more than 30 years is about to be broken. Stratolaunch, the giant aircraft jointly built by Microsoft co-founder Paul Allen and SpaceX owner Elon Musk, has reportedly completed the engine ignition test recently fly.
If the capability of the An-225 transport shuttle is amazing, the stunt of the transport aircraft in the stratosphere is to launch a rocket at a height of 10,000 meters.
From the aircraft "shoulder" take advantage of more
Allen and Musk build the plane, of course, not only to create the Guinness Book of World Records. Zhang Baoxin introduction, the aircraft will be used to launch Pegasus rocket in the air, the mass is not too large load into space, occupy part of the commercial launch market.
Zhang Baoxin said that Pegasus is different from the ordinary vertical launch rocket, but the horizontal launch mode. Its launch is very similar to that of fighter-launched missiles, all of which are brought into the air by airplanes. After their release, they are allowed to freely fly and then fire. The difference is that the missiles are air-to-air or air-to-ground, and the rocket must be corrected, deflected and then fly upward again.
Aerospace expert Pang Hao said the launch of this air, equivalent to the combination of aircraft and spacecraft into a two-space plane. Replacing the rocket stage with an aero-engine makes it more efficient in the atmosphere; a rocket "standing on the shoulders of an aircraft" can also save fuel for the initial flight.
Zhang Baoxin said that compared with the traditional land-based launch, space-based launch can save about 30% of the cost; the aircraft can be reused, but also reduce launch costs. However, the final cost is how much, but also need to test, test after the test calculation.
There are many advantages to launching air. Pang Hao said that the aircraft can be rocket sent to any location at high altitude launch, from the weather on the ground can be limited, but also to expand the orbital inclination range, increase the launch window opportunities. At the same time this way fast response, suitable for emergency launch. Zhang Baoxin said that from a security point of view, as long as the failure from the institution does not occur, the safety is still relatively high. The plane can launch the rocket over the open sea, and even if the rocket fails to fire, it falls into the sea without threatening the ground.
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