Word: turbojet
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...times." Like the Air Force's pioneering XI, the Navy's Skyrocket is a rocket plane. But the X-I is intended to be dropped at high altitude from a B29, while the Skyrocket takes off under its own power. Inside its slim body is a powerful turbojet engine as well as the rocket motor. The turbojet is used first (with rocket assist at takeoff), to get the plane to high altitude. Then the rocket motor pushes it to supersonic speed...
With its swept-back wings and dual power plant, the Skyrocket is closer than the X-I to being a practical supersonic airplane. Flying on its turbojet alone, it has a respectable endurance: about half an hour. In combat, the rocket motor could give it brief bursts of superspeed...
...Chance Vought XF7U-1, which completed its initial flight tests last week. The new fighter has short, broad wings "swept back" at an angle of 45° or better. There is no tail; two stabilizers with rudders are attached to the trailing edges of the wings. Two Westinghouse turbojet engines drive the plane at better than 600 m.p.h...
What sort of engine would be used? Poole was vague. It would not be a nuclear turbojet, he said, or a steam turbine, or a ramjet. All these had been tried and found wanting. The atomic engine, said Poole, would be a "nuclear rocket." That was all he would say. The nature of the nuclear rocket, he said, is secret...
Neither of these combinations is novel to engine designers. Both have been discussed for many years as promising possibilities. Technical improvements discovered during the development of the turbojet engine made them practical. The turbojet's threat to piston engines made them necessary...