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Old 17th May 2020, 04:12 PM   #26
Penultimate Amazing
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Join Date: Jun 2005
Posts: 18,030
Originally Posted by bruto View Post

I've coasted and bump started enough old Peugeots to say without any reservation that a coarse enough worm drive can be driven by the wheel.
There is a limited slip differential that makes use of that worm gear trait. Gleason-Thorsen. Helix angle is about 45 degrees. It's a complicated gear train, think woms between the two axles.
Any sufficiently advanced idea is indistinguishable from idiocy to those who don't actually understanding the concept.
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