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Re: [PSUBS-MAILIST] counter rotational



David,
 
I don't have any drawings on the mechanism for contra-rotating propellers.  Counter-rotating refers to props turning in opposite directions on separate shafts or engines such as on the right and left wings of a twin-engine airplane.
 
Torpedoes are the most common application for contra-rotating props because they are operating at high speed and high torque, and there is a real need to offset the adverse rotational effects.  In most applications anything you would gain would be offset by the loss of final output due to increased size, weight, and friction of the transmission.  If I recall correctly there is one class of Russian subs that uses contra-rotating props, but I can't remember which one.
 
What application are you considering?
 
Jim
 
In a message dated 12/30/2010 12:03:38 A.M. Central Standard Time, dbartsch2236@hotmail.com writes:
Anyone have a clue as to how a single shaft dual rotating propeller gear box works? Drawings?
 
David Bartsch
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