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----- Original Message ----- From: <Lehanover@aol.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Sunday, December 12, 2004 7:39 AM
Subject: [FlyRotary] Re: Serious single rotor questions
In a message dated 12/12/2004 9:01:47 AM Central Standard Time,
jesse@jessfarr.com writes:
<< Bill Schertz
I have to admit that I never looked at exactly how the oil gets out of the
rotors. Can anyone confirm this?
>>
One or the other or the irons that has no stationary gear teeth will be the
oil return. Unlike the center iron that has the angled return ramp to the sump,
the front iron drains through a window at the bottom of the stationary gear.
The rear iron has an angled ramp like the center iron. So if the rotor gear
faces the rear iron it might work.
Richard Sohn has one running, but I didn't ask which gear he was using.
Unless you make some of this out of aluminum, there is very little weight
savings over the two rotor.
Lynn E. Hanover
Homepage: http://www.flyrotary.com/
Archive: http://lancaironline.net/lists/flyrotary/List.html
I am using the WP side stationary gear. My e-shaft is modified on the PTO side to safe more weight. Lynn is right, if you want to safe any significant amount of weight on a single rotor, drastic changes will have to be made. Like side housings, water pump, e-shaft and redrive attachment. The counter weight system has to optimised for best total weight.
With all that considered, my 12A based engine is now at about 90lb.
I picked the HIRTH redrive because is is rated at 135hp and has good selection of ratios. I have now a 3.3:1 for use in my ADID and plan to run the engine up to 7500RPM.
Richard Sohn
N-2071U
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