Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84; site spar.UUCP
Path: utzoo!linus!decvax!decwrl!spar!freeman
From: freeman@spar.UUCP (Jay Freeman)
Newsgroups: net.space
Subject: Re: Angular Momentum Cancelation
Message-ID: <411@spar.UUCP>
Date: Sat, 20-Jul-85 20:53:05 EDT
Article-I.D.: spar.411
Posted: Sat Jul 20 20:53:05 1985
Date-Received: Sun, 21-Jul-85 23:44:55 EDT
References: <3115@decwrl.UUCP> <15700023@uiucdcsb>
Reply-To: freeman@max.UUCP (Jay Freeman)
Organization: Schlumberger Palo Alto Research, CA
Lines: 14
Summary: 

[]

In article <15700023@uiucdcsb> dollas@uiucdcsb.Uiuc.ARPA writes:
>
>There is a Soviet helicopter. Its NATO designation is HORMONE (don't ask
>me why) which has two counter-rotating sets of blades and no tail rotor.
>
>I do not know of any american helicopters that use this principle.

An American manufacturer -- I think it was Kaman -- used to make some
helicopters that used contrarotating blades that meshed like the blades of
an eggbeater.  The Navy bought some of them.

-- 
Jay Reynolds Freeman (Schlumberger Palo Alto Research)(canonical disclaimer)