aerial torpedo(redirected from Hewitt-Sperry Automatic Airplane)
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aerial torpedo[′e·rē·əl tȯr′pēd·ō]
A torpedo designed or adapted to be launched from a low-flying aircraft into water.
Formerly, the explosive projectile thrown by a trench mortar and designed so as to fall point down.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.