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Vought-Sikorsky VS-300 helicopter in tethered flight, USA, 1939 (lemmy.world)

submitted 5 months ago by PugJesus@lemmy.world to c/historyporn@lemmy.world

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[–] eRac 4 points 5 months ago (1 children)

It seems a bit odd. The main rotor imparts an opposite spin on the body. Tha tail rotor is there to counteract that spin by blowing sideways. A horizontal one would have to use just its spin, not getting the benefit of the air mass being pushed sideways.

[–] AtariDump@lemmy.world 3 points 5 months ago (1 children)

[–] WaterWaiver@aussie.zone 4 points 5 months ago* (last edited 5 months ago)

That (chinook-style solution) only works if both rotors are the same size and speed.

Perhaps Sikorsky's tethers to the ground worked around the problem for that photo anyway. Not sure.