Al, for what its worth.  Both Tracy Crook and I compared notes back 5-6 years ago and came to the same conclusion.  That our engines seem to improve in power very gradually for about the first 150- 200 hours or so.  We attributed it to gradually better seating and sealing of the seals.

 

Ed

 

 

Kelly;

 

That was my thought also; although I’d not like to think that the side seals in my engine are not too good after only 150 hours.  I’m thinking it could also be influenced by engine coolant temp – my cruise temp was running down around 140F at the time I was seeing fairly rapid buildup of 2-stroke oil in the pan.  Cooler side housing temp; more of the oil condensing there, maybe?

 

Would poor side seals also result in loss of power?  My engine power has improved slightly over the past couple years.

 

Al G

 

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Kelly Troyer
Sent: Monday, July 13, 2009 2:08 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: INJECTION OIL IN FUEL

 

-------------- Original message from "Ed Anderson" <eanderson@carolina.rr.com>: --------------


> Yvon, I don't know the minimum, but I used to have the same problem. I
> would have to drain 1/2 cup of crankcase oil after about 10 hours of flight.
> So I started reducing the amount of 2 cycle oil. I have flow for the last
> three years mixing 3/4 oz of 2-cycle oil to one gallon (US) of fuel with no
> apparent ill effects on the engine and I am no longer accumulating 2 cycle
> oil in the oil pan.
>
> Ed Anderson
>
> Rv-6A N494BW Rotary Powered
>
> Matthews, NC
>
> eanderson@carolina.rr.com
>
> http://www.andersonee.com
>
> http://www.dmack.net/mazda/index.html
>
> http://www.flyrotary.com/
>
> http://members.cox.net/rogersda/rotary/configs.htm#N494BW
>
> http://www.rotaryaviation.com/Rotorhead%20Truth.htm
>
>
> -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
> Behalf Of Yvon Cournoyer
> Sent: Friday, July 03, 2009 11:29 AM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] INJECTION OIL IN FUEL
>
> My engine is a 1986 13B with 88 hrs since remanufacture.
> I fly a Zenair Zenith with a cogbelt PSRU and a Warp Drive 3-blades prop
> and this engine never runs above 5700 rpm
> When I installed this engine in my Zenith I removed the metering oil
> pump and have been using two stroke injection oil mixed in the
> automobile fuel ( 87 octane gasoline)
> At first I used a volume mix of 128:1 gas to oil and soon noticed an
> increase of engine lubricating oil volume in the oil pan
> I have gradually reduced the volume mix of gas to oil to 140:1 but there
> is still a slight increase of engine lubricating oil in the pan.
> Also a local mechanic has mentionned that the two stroke injection oil
> is degrading the 20W-50 engine oil.
> How much can I reduce the volume mix of gas to oil ?
> Please advise
> Yvon
>
>
> --
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