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From: "Richard Sohn" <unicorn@gdsys.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-564367@logan.com>
Subject: Re: [FlyRotary] Re: Serious single rotor questions
Date: Sun, 12 Dec 2004 12:36:30 -0800
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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