gollum.space
RU
Sikorsky flying laboratories: S-61A "Rotorprop" and S-61F "Compound"
HeliManiA
VerTolyoToManiYa
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Aviation
Helicopter
Helicopter pilots
Military aviation
Military history
Military equipment
Aviation history
Flight tests
Science and technology
The first flight
Flight
Sikorski
USA
Experiment
Yandex Zen (link)
v20240901