▎ 摘　　要

NOVELTY - The flight recorder has a flight recorder main body set in inner cavity of shell. An external filamentous antenna is wound on outer part of the shell. An end of each external filamentous antenna can be electrically connected with the flight recorder main body. Each external filamentous antenna is provided with a weak part capable of cutting off. When the weak part is cut off, the broken end of the weak part can move towards the direction far away from the shell. USE - Flight recorder for use in an aircraft for recording various data in the flight of the aircraft especially flight parameter condition when the accident occurs. ADVANTAGE - The signal transceiving intensity is effectively improved. The search difficulty of the flight recorder after accident is reduced. The falling probability of falling into rain forest, gobi and desert is improved. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of a flight recorder.