Flying the Hypert1 Skies
A little airplane has given new meaning to the term going hyper.
The Hyper-X is an unmanned,experimental aircraft just 12 feet long. It achieves hypersonic speed using a special sort of engine known as a scramjet3.It may sound like something from a comic book,but engineers have been experimenting with scramjets since the 1960s.
Out of the three experimental Hyper-X aircrafts built for NASA5,only one is now left.The agency has plans for another 11-second hypersonic flight,this time at 10 times the speed of the sound.
The Hyper-X broke the record because
B it flew along the equator.
D it traveled at a supersonic speed.
A A jet engine that gets oxygen from the air.
C A rocket engine that carries its own supply of oxygen.
What is NOT true about the scramjet engine?
B It extracts oxygen from the air that flows through the engine.
D It doesnt carry its own oxygen supply.
A It indicated the birth of a very fast airplane.
C It can transportcargo quickly and cheaply to the brink of space.
What has NASA planned to do?
B To make three more Hyper-X experiments.
D To make the aircraft fly higher and longer.
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