副翼(ふくよく)

ふくよく
noun
aileron
transportationtechnology
1. aileron; secondary wing surface
A hinged control surface on the trailing edge of an airplane wing, used to control the aircraft's roll. Ailerons on the left and right wings move in opposite directions to tilt the plane.
副翼(ふくよく)を操作(そうさ)して機体(きたい)を傾(かたむ)ける。
Operate the ailerons to tilt the aircraft.
左(ひだり)の副翼(ふくよく)を上(あ)げると機体(きたい)は左(ひだり)に傾(かたむ)く。
When the left aileron is raised, the aircraft tilts to the left.
事故(じこ)調査(ちょうさ)の結果(けっか)、副翼(ふくよく)の故障(こしょう)が墜落(ついらく)の原因(げんいん)であったことが判明(はんめい)した。
The accident investigation revealed that a malfunction of the ailerons was the cause of the crash.

A compound of 副(ふく) (secondary/auxiliary) and 翼(よく) (wing). The Japanese term literally means "auxiliary wing," reflecting that ailerons are movable surfaces attached to the main wing.

Common collocations

Similar words

  • 主翼(しゅよく): main wing (the primary wings of an aircraft)
  • 尾翼(びよく): tail wing; empennage (the tail section of an aircraft)
  • 方向舵(ほうこうだ): rudder (controls yaw, the left-right rotation)
  • 昇降舵(しょうこうだ): elevator (controls pitch, the nose up/down rotation)

Technical note

Ailerons work in pairs: when one goes up, the other goes down. The wing with the lowered aileron generates more lift and rises, while the wing with the raised aileron generates less lift and drops, causing the aircraft to roll.

Related Words

Compare: 主翼(しゅよく) (main wing)
Compare: 尾翼(びよく) (tail wing)
general
Added 2026.5.3 9:00 · Revised 2026.9.2 13:02
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