Helicopter, flying, interior perspective
Helicopter, Sikorsky S76A, pass by in the distance, with birds in the background
Jet helicopter approaches and circles in large circle overhead with good rotor sound, flies away. Vintage ...
Small helicopter starts rotors with high pitched choppy whir, takes off, synthesis chopper. Vintage recording.
Flying a model plane by. Thin buzz. Vintage recording.
Helicopter rotor blade, slow down
Long high pitch tones modulating randomly