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Rusty, you can create a 5 psi bypass of the pump. In suction the pressure relieve valve http://enginegearonline.com/prreva.html
will be shut. If the pump stops, the engine will pressurize the pump intake side and the spring loaded valve will open and let the engine push the oil through at only 5 psi. How about that?
Buly
From: "Russell Duffy" <13brv3@bellsouth.net>
Date: 2005/06/14 Tue PM 05:19:56 EDT
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: turbo oil drain
Here is a company that sells a turbo oil scavenge pump.
http://westech.home.mindspring.com/ Thanks, but as it turns out, I already bought one from Buly. His is a bit
smaller and lighter, but higher flow and (unfortunately) current draw. I
always take these specs with a grain of salt though, so we'll see how it
works in reality.
I've already thought of one problem, which is what will happen if the motor
ever stops running. If that happens, depending on the flow resistance of
the stopped pump, it could blow the turbo seal instantly. The plan will be
to route a normal oil drain line to the front cover, which will be about 12"
uphill. Near the turbo, I'll T into the line, and attach the pump, which
will send the oil to anywhere convenient. This will also keep the pump from
creating a suction on the turbo bearings. Yep, I guess this makes Rev-5 official, though I'm planning to (try to) hold
off until get the Kolb ready to fly.
Cheers,
Rusty .
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