Another simple mechanical construction. I’ve tried to make it resemble the Mooney speedbrake. Interfacing to keyboard via the toggle to momentary switch action circuit.
Shown in
retracted position
Update:
When flying gliders, it is important that you are able to regulate the amount of air braking. MS-FS has the possibility to assign the airbrake to a joystick axis. I used a similar method as throttle for moving the potmeter with slide mechanism.
Proportionally controllable airbrake. The on/off switch construction is also
maintained, for flightsims w/o proportional control.