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John, sorry to hear about your problems. Here is a shot in the dark. You
mentioned you changed your oil and filter before the flight- you did not
indicate whether you had any oil problems before you changed the filter.
Filter internals have been known to collapse or otherwise obstruct oil flow.
Impeded oil flow could account from both the low pressure as well as the
high oil temperatures.
If indeed these problems did not exist before the oil change -I would
strongly suspect the only new component in your oil system - the oil filter.
FWIW
Ed Anderson
----- Original Message -----
From: "John Slade" <sladerj@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Sunday, November 28, 2004 5:23 PM
Subject: [FlyRotary] Re: Another precautionary landing
Today I changed the plugs, oil and filter. Engine seemed to be running
well.
Oil pressure 87 on the runup. I didn't hear anything unusual, but an
observer on the ground said I had a misfire or two on the take-off roll.
I did a pattern. Oil pressure 65 on the downwind at 3600 rpm. After a low
pass, which apparently sounded sweet from the ground I headed south a few
miles and climbed above the class C. By the time I was over the field at
5000' the oil pressure was 24 at 3500 rpm, coolant temp was 230 and oil
220
(much higher than usual). I began a descent. At minimum throttle temps
went
back below 200, but oil pressure was around 20 - 25. Engine began running
rough. Richer mixture smoothed it out. I had the mixture at a 4 pm
setting.
Anything leaner and it faltered. Switched off one set of injectors (the
primaries I think) and it ran better.
On short final at idle oil pressure was in single digits, and as I taxied
back to the hangar it was actually reading negative.
Y'know - I'm getting really sick of this.
John (hoping for a positive attitude in the morning)
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