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| | Not Until: Firsts in WW2. |
 | | Development of the "Flying Flapjack", a fighter aircraft with an almost circular wing, was initiated with Vought-Sikorsky Aircraft for the V-173 -- a full-scale flying model (as distinguished from a military prototype). |
 | | Flight tests in a PBY of radar utilizing a duplexing antenna switch; thereby, the necessity for cumbersome "yagi" antenna no longer existed, a factor which contributed substantially to the reliability airborne radar. |
 | | The Gorgon was later expanded into a broad program embracing turbojet, ramjet, pulse jet, and rocket power; straight wing, swept wing, and canard (tail first) air frames; and visual, television, heat-homing, and three types of radar guidance for use as air-to-air, air-to-surface and surface-to-surface guided missiles and as target drones. |
| www.ww2pacific.com /notuntil.html (5258 words) |
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