Hinged Surface on a Plane Wing
This page is the CodyCross answer for the clue below from Past and Present Tech, Group 1458, Puzzle 1 (Overhead Projector).
Question is: Hinged Surface on a Plane Wing
and the answer is: AILERON
Word Meaning:
AILERON — The hinged part on the trailing edge of an airplane wing, used to control longitudinal turns.
Definitions from Wiktionary.