flyrotary@lancaironline.net Mailing List Archive

Richard,

I think the oil filter is supposed to be the last thing before the engine. If so, how could a low flowing oil cooler build pressure to blow the filter? The filter should be after the cooler??

Bill B

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Richard Sohn
Sent: Friday, October 02, 2009 9:49 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Good, bad news...too much oil pressure somewhere

----- Original Message -----

From: Al Gietzen

To: Rotary motors in aircraft

Sent: Friday, October 02, 2009 8:18 PM

Subject: [FlyRotary] Re: Good, bad news...too much oil pressure somewhere

Almost immediatly I noticed one of my heavy duty Aeroquip oil lines had burst. Hmmmmm, the Oil Pressure reading never went over 75 and was around 35 when idle (as a matter of fact, at idle, it is usualy around 30). I belive these reading to be in the normal ranges.

This is strange. What type of hose? If it is the Teflon/braided SS line it should take several hundreds of psi. Is there not a pressure relief valve on the outlet side of the pump that limits the pressure to something like 150 psi?

Al G

Forgot about that, Al. I did not have the relieve valve when my oifilter blew the gasket.

Nevertheless, this should not happen under normal condition. After I fixed the oilcooler problem, it never happened again, and I still do not have a relief valve in the ground testing engine.

Richard Sohn
N2071U

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