adverse yaw

Noun

uncountable

(aviation) The phenomenon whereby rolling an aircraft to start a turn in one direction increases the drag on the upgoing wing on the outside of the turn, creating a tendency (especially at low airspeed and high angle of attack) for the aircraft to yaw out of the turn, and, instead, begin to turn in the direction opposite that desired.

Japanese Meaning

航空機が旋回を始める際、ロール操作によって、外側の上昇する翼に抗力が増大し、機体が意図した旋回方向とは逆にヨー（首振り）する現象。 / 特に低速や高迎角の状況で顕著となり、航空機の制御に影響を与える要因となる。