The Hirsch–MAéRC H-100 was a one-off research aircraft designed by Frenchman René Hirsch to test his system to deal with gusts that make for bumpy and uncomfortable flying.
It incorporated a system in which the halves of the horizontal tail moved on chordwise hinges to operate flaps on the wings. The conventional elevators provided not only pitching moments, but moved the tail halves about their chordwise hinges to cause the flaps to move in the direction to provide direct lift control. In this way, the loss of longitudinal control due to the gust-alleviation system was overcome. Of wooden construction, the H-100 incorporated many other ingenious features, including swivelling wingtips for reducing rolling moments due to rolling gusts and lift due to horizontal gusts. The design also incorporated large pneumatic servos operated by dynamic pressure to restore damping in roll and to stabilize the rate of climb or descent.
The single aircraft built was retired after 130 test flying hours and was then donated to the Musée de l’Air et de l’Espace, at Le Bourget, Paris, where it remains on display.