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Old Oct 28, 2001, 07:29 PM
Registered User
Joined Oct 2001
29 Posts
Counter-rotating rotor mechanism

Anyone know of a web site that explains the workings/assembly of a two bladed
counter-rotating rotor mechanism? I.E. the kind that would be used on VTOL.

How about a working scale model of the above drive mechanism - do any exist?
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Old Oct 28, 2001, 09:57 PM
Strange Plane Central
frankenfoamy's Avatar
Poway (near San Diego), CA US
Joined Dec 2000
1,884 Posts
Think of your car diferential with two spur gearsdriving off the one pinion (drive shaft)
One spur gear shaft fits in the hollow shaft of the other.
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Old Oct 29, 2001, 04:17 AM
ChrisP's Avatar
Weilbach, Germany
Joined May 2001
2,471 Posts
I just came back from 2 weeks vacation in Turkey. While I was in the coastal town of Alanya last week I heard a strange, distant 'tacka tacka' noise which got closer and closer. To my utter amazement it turned out to be a Russian Kamov helicopter - the one with twin counter rotating rotors on a single shaft and no tail rotor. It then hovered about 50 feet away from me so I got a real close look. It was painted white, privately registered and I guess must have been 30 years old or more.

Awesome to see something that unexpected !!
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Old Oct 29, 2001, 11:59 AM
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Joined Oct 2001
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Thank you for the analogy frankenfoamy.
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Old Oct 30, 2001, 12:58 PM
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Kevin Murray's Avatar
USA, NC, Greenville
Joined Dec 1999
9,273 Posts
Keith Shaw made a beautiful one a while back. Driven by an Astro flight cobalt motor for a Bugatti racer. I think. It is a work of art.
I don't have the pictures but one is wouth a thousand words. Search here for the pics. They will explain a lot, a lot more than I have.
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