If it leaks past the seal while no oil pressure, I would agree you have a
defective seal.  Ok, 1/16" of an inch rather than 1/8" on the restriction.
I may have gotten the viscosity of the oil incorrect in the calculator.

Ed

Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
From: "DaveLeonard" <daveleonard@cox.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Monday, June 14, 2004 12:39 AM
Subject: [FlyRotary] Re: Pressure Reduction Was Re: [FlyRotary] Re: Some
Taxi testing today. With oil leak.


>
>
> Ed, thanks, that's good input.  However, remember that the pressure drop
> will depend on the flow rate.  After taking your lead, I looked at Corky's
> book and read his discussion.  He recommends a .055-.065 restriction.
That
> is quite small.  I decided to try a 5/32 hole today with no improvement in
> leak.  Then I just poured some oil in the top of the turbo and got a leak,
> so it is going back to the "re-builder" and my first flight is delayed
> another few weeks.
>
> At least it was fun to get the tail up on the runway.  :)
>
> Dave Leonard
>
>
> ____________________________________
>
>
>
> Dave, a calculator I found on the Web indicated that with oil going from a
> 3/8" dia (AN-6) through a 1/8" orifice would reduce the pressure by approx
> 40 psi.  So if your engine is putting out 70-80 psi that would bring it
down
> to the 30-40psi range which should be acceptable.
>
> Ed
>
> Ed Anderson
> RV-6A N494BW Rotary Powered
> Matthews, NC
>
>
>
>
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