| 释义 |
jetavator Astronautics.|ˈdʒɛtəveɪtə(r)|
Also jetevator.
[f. (irreg., in the case of jetavator) jet n.3 + elevator.]
A ring-shaped deflector surrounding the exit nozzle of a rocket engine which can be swivelled into the exhaust gases to divert them and so alter the direction of the thrust.
1960Aeroplane XCVIII. 176/2 The missile is powered by a solid-propellent Aerojet rocket motor fitted with ‘jetavator’ deflectors of the kind developed for Polaris. 1961Flight LXXIX. 13/2 The use of swivelling nozzles is claimed to be lighter than the Polaris system of fixed nozzles plus jetevators, and undoubtedly minimizes drag. 1967Propulsion (Amat. Rocket Assoc. U.S.) ii. 45 A jetavator consists of a ring surrounding the exhaust-nozzle exit. The ring is mounted so that it can be moved into the jet exhaust as needed. |