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Military aviation, Science and technology
21-May-2024 Tuesday
Sikorsky flying laboratories: S-61A "Rotorprop" and S-61F "Compound"
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Sikorsky flying laboratories: S-61A "Rotorprop" and S-61F "Compound"
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)
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