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Gravity powered devices => Gravity powered devices => Topic started by: iacob alex on December 05, 2017, 03:22:17 PM

Title: Wheel inside a wheel ...
Post by: iacob alex on December 05, 2017, 03:22:17 PM
.....as a possibility to play the rolling CoM , on the same side of the fulcrum , at :
     https://youtu.be/k4mTvCVw7iQ
     Al_ex
Title: Re: Wheel inside a wheel ...
Post by: Paul-R on December 05, 2017, 04:53:28 PM
wrong thread.
Title: Re: Wheel inside a wheel ...
Post by: Low-Q on December 12, 2017, 04:06:53 PM
Fulcrum of the three-armed rotor does not move. It does not apply weight to the large rotor. It won't work.
Title: Re: Wheel inside a wheel ...
Post by: sm0ky2 on December 13, 2017, 12:51:05 AM
Rotation of the wheel places tension on the axle
of the smaller spindle.



“Do-nothing machine”


https://m.youtube.com/watch?v=pid70tRkDJo (https://m.youtube.com/watch?v=pid70tRkDJo)


Title: Re: Wheel inside a wheel ...
Post by: sm0ky2 on December 13, 2017, 01:07:16 AM
It actually has millions of uses, to apply torque and leverage
Design complex actuators
Archimedes wrote an entire book of these things.


But they do require energy to operate.

Title: Re: Wheel inside a wheel ...
Post by: Thaelin on December 16, 2017, 02:29:37 PM
Hmmm, so does the Archimedes thing have a true circular path around a center?  Makes me want to try something if it does.
Title: Re: Wheel inside a wheel ...
Post by: sm0ky2 on December 16, 2017, 03:00:33 PM
At certain points yes, at others the path varies slightly from Pi
depending on the design of the contraption
And this causes slight friction and pressure on places.


Some designs are more Pi-ish than others.


A lot also has to do with precision, and clearance of the moving parts
Title: Re: Wheel inside a wheel ...
Post by: Thaelin on December 17, 2017, 09:33:22 AM
Watched it more closely   in slow mo and it is really an oval path. Not workable for me. Onward.