1957-01-01

Convertiplanes and Other VTOL Aircraft 570017

REVIEW is given of some representative current configurations and propulsion arrangements for VTOL aircraft. Support is urged for a comprehensive development program on VTOL aircraft to cover the spectrum of aircraft flight speeds and promising propulsion arrangements.
Special effort and support is needed on ducted-propeller and ducted-fan types, the author says, as these show considerable promise for commercial and military transport use. Development of this type is dependent upon the availability of suitable powerplants.
Efforts to reduce the landing and take-off distance requirements of conventional fixed-wing airplanes should continue, he feels, but it should not be accepted as an interim step toward or a substitute for true VTOL aircraft development.

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