X-Mozilla-Keys:                                                                                 
Jim Dana  wrote:

Paul.... The oil as I understand it , is being squirted on the underside of
the rotors to cool them. If you ceramic coat the faces of the rotors , the
heat transfer is partially blocked . It doesn't magically go out the exhaust

If it really worked I think it would Jim. It adds to the heat in the
expansion
chamber and some would come out in the form of improved torque. The
rotor
housing of course would run slightly hotter so there would be a slight
increase in cooling load. If it was possible to coat with ceramic and 
polish the rotor housing even more would come out in the form of torque.
Then of course you would have a real problem with apex seal
compatibility.

... there are other wonderful parts inside the engine which will soak up the
heat....... bearings , aluminium housings, seals among other things . If i
recall correctly , none of these parts like more heat!  The purpose of the
ceramic coating in a piston engine is to reduce heat transferto the piston
and thereby create more energy in the combustion chamber....BUT.... if you
are depending on oil to help you cool a rotary, you would want more transfer
to the oil to cool the rotors.  Just my humble view.    JIM DANA

Any heat going into the oil is waste energy. In fact it adds slightly
to the cooling drag.

Paul Lamar
 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org