Small helicopter lands with whine of turbine and rotors slowing, medium perspective, fades out. Vintage ...
Light aircraft engine, speeding up and taking off
A helicopter departing, with prop plane in background.
Rapidly mid pitch moving square wave, ascending
Aeroplane interior during a flight
Throbbing bassy bed with ringing overtones and slow panned whooshes
Whine of turbines, some rotor noise, increasing in intensity and speed of rotors, until chopper takes off ...
Swirling rotors (square waves) with pulsing jet engine drone in background
Jet engine ignition, taking off
Deep dirty throbbing engine noises & alarms tailing into the tinkling distance