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Date: Thu, 12 Jan 2012 11:05:17 -0500
From: Ernest Christley <echristley@att.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Single Rotor Update
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That prop looks bigger than the one I built for a two rotor!


Richard Sohn wrote:
> The ROTARY PRAGMA with the one rotor engine is finally doing taxi tests.
> This is without cowling. Every thing, almost, is running good.
> Temperatures were good with 160F for oil and water at 70F OAT. All
> systems seem to be working as planed. I had to play a little bit with
> the throttle setting for starting, but after a couple of times it became
> real easy and it started every time.  She is really wanting to fly now!
>  
> The recently reported blowout of the oil filter gasket was traced to two
> causes. One was the oil I used. I concluded from the testing on the
> stand that using 40 or 50 weight VR1 racing oil would be a good choice.
> It did work on the test stand satisfactory. However, at 45F temperature
> it is awfully thick, and my conclusion was it was a major contributor to
> the blow out. The other thing was, the oil filter I used was a general
> type filter. When I had a closer look at the design of the rubber gasket
> and its placement in the filter body in different filters, especially on
> an old Delco fro m one of my 1987/88 RX7 engines, I realized a
> significant difference. These filters have an o-ring as a seal placed in
> a groove which makes it possible to tighten the filter to the metal to
> metal point keeping the rubber seal completely enclosed. Looking for
> this kind of filter in the auto parts store led me to a K&N filter. It
> is pricy at $15.00 but is the same seal design as that old Delco.
> Using the K&N filter and W20/50 VR! oil solved the problem.
>  
> Richard Sohn
> N2071U
> http://www.fairpoint.net/~res12/home.html
>  
>  
>                                                  DSC00015
> Sorry for the first one, it got out of my hand.
>