Immelmann definition by American Heritage Dictionary
A maneuver in which an airplane first completes half a loop and then half a roll in order to gain altitude and change flight direction simultaneously.
Origin: After Max Immelmann (1890-1916), German aviator.
Variant of Immelmann (turn)
a maneuver in which an airplane is half looped to an upside-down position and then half rolled back to normal, upright flight: used to gain altitude while reversing direction
Origin: after M. Immelmann (1890-1916), German ace