The angle formed with the air stream when front edge of the lifting surface dips below the apparent flight path.
Stability due to some fixed arrangement of the main or auxiliary surfaces. A machine that requires mechanism or moving parts for its stability is automatically but not inherently stable.
The crowding of the airstream in the gap of a biplane or triplane causes the surfaces to "Interfere," and results in a loss of lift.
J
JOY STICK.
See CONTROL STICK.
Bracing strut.
Rim of wheel.
K
KITE BALLOON.