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inverted oil pressure

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armin(at)jarin.de
Guest

Posted: Sun Aug 17, 2008 10:08 pm Post subject: inverted oil pressure

List,



I discovered that the oil pressure in my 52 goes zero when flying inverted.

After rooling over, it drops constantly within maybe 2 seconds to zero.

Didn't feel like waiting there any longer to see what happens next. Within

this short period of time, RPM stayed constant at 82%.

Checked the gimbal pickup in the tank to be fine. The canister where the oil

temp probes are located has no visible cracks and no leak.

Probably the oil pump? It keeps the pressure constantly at 5, but with the

oil really warm after the flight, the pressure drops to 2 at 26% RPM. Maybe

worn out and unable to keep enough suction in inverted flight?

Any more ideas?



Armin

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dsavarese0812(at)bellsout
Guest

Posted: Mon Aug 18, 2008 3:12 am Post subject: inverted oil pressure

Armin,

Do you know for sure the gimbaled pickup in the oil tank is rotating 

completely when inverted?  You may want to remove the tank and examine it 

carefully for proper operation.  Certainly your oil pump may have a problem. 

But my suspicion is the problem lies in the oil tank pickup mechanism.

Dennis



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