flightgear (free/opensource flight simulator) has it. To get it started, press the engine primer 3 times, put mixture all the way in, throttle to 20% (+ thrott

flightgear (free/opensource flight simulator) has it. To get it started, press the engine primer 3 times, put mixture all the way in, throttle to 20% (+ throttle = 9, - throttle = 3), and turn the key twice (type "}}"), start it (s key), remove the parking brake (shift+B key). Then start increasing the throttle and when the airspeed indicator shows about 50 knots, go up by pressing the down key to take off. Do not try in an actual plane.