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▲ leoedin 2 days ago

A really neat concept. It uses a special hinge design, a magnetic encoder and torque modulation to control the lift of the rotor as it spins. Completely negates the need for a conventional helicopter's swash plate.

The single motor does have the pretty major downside that it spins the moment it's in the air. I suspect a 2 motor drone with a tail motor would be a lot more practical. But I really like how mechanically simple the rotor hinge design is - it pushes all the complexity into the control algorithm.

▲schiffern a day ago | parent | next [-]

Note that the concept itself has been done before in RC helicopters. The only difference here is using a one-propeller drone.

https://hackaday.com/2020/06/25/building-and-flying-a-helico...

https://www.youtube.com/watch?v=d80oXSCcHTk

▲fwipsy a day ago | parent | next [-]

Yep, he mentions the video you linked as well. (Mentioning because I watched the video you linked first.)

▲ a day ago | parent | prev [-]
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▲Aboutplants a day ago | parent | prev | next [-]

Perhaps there are specific applications where the payload spinning could be an advantage, imaging/scanning perhaps (which in the video is going to be in the next iteration for the builder).

▲gf000 a day ago | parent | next [-]

I don't think it would be all that useful, give the very way it works (modulating motor speed) - your rotation would not be consistent in speed during even a single turn, which makes exposure times different each frame, and possibly too low.

▲ a day ago | parent | next [-]
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▲jacquesm 13 hours ago | parent | prev [-]

GP is right and the exposure time difference can be dealt with in software because you can model it. The degree to which you can modulate a modern CCD's exposure time dwarfs the speed of rotation.

▲ a day ago | parent | prev [-]
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▲ZiiS 18 hours ago | parent | prev [-]

Couldn't you use one motor attached to two props spinning in opposite directions?

▲gambiting 14 hours ago | parent [-]

You absolutely could, and that's exactly how a lot of RC helicopters have been flying around for decades now.

https://www.scribd.com/document/840293339/Lama-V3