Subject: Rotary helicoptors.
From: ACRE NL
Date: 11/15/2001, 1:41 AM

Blake Mantel wrote:

Opsss.... Hit the send too soon!

http://www.protor.narod.ru/images/engine.jpg

Loose the V-belts and go with a Poly chain. Interesting to see the mounting of the 90 degree drive, and the cooling air to it.

Paul, I still wonder if you could somehow get vertical operation of a rotary.... Hmmmm.

How much is lost in a 90 degree drive in percentage of total power?
Blake

Not much.  A hypoid is a bit less efficient than a plain bevel drive.
I would say less than 3% for a hypoid. That can be a lot of heat however
as 6 HP out of 200 HP is 4,476 watts so some sort of oil cooling would probably
be required. NASCAR racers use differential coolers.

Paul Lamar
 
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