I read a lot about the Rotary and I am beginning to get a better
understanding of its workings. The only thing I haven't seen are working
temperatures for oil and coolant. What is an acceptable upper limit for
oil temp and coolant. The other thing is fuel pressure and oil pressure
along with an idea of what the coolant system pressure would normally
be. Thanks if you can answer this for me.

Cheers
Baz Mayne

Coolant temp must be kept below boiling of course. That depends on a few
things like antifreeze to water ratio and coolant system pressure. I
recommend a 24 psi pressure cap. Expierence of others would suggest
coolant temps can be run as high as 220 F successfully. Lower is better
as there is some data to support the idea that lower temps generate more
power. Lower temps also give a grater safety margin for climbing out at
max angle on a hot day. On the other hand higher temps result in better
BSFC.

Oil is pretty much the same. Nothing is cast in concrete.

Paul Lamar

This further emphasizes the importance of a cowl flap for best MPG..
Higher temps=lower fuel burn, lower drag..  Ideally, the cowl flap can be
closed enough to raise temp while at high altitude, low power.


Matt-

Very good point Matt. Thanks.

Paul Lamar

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