X-Mozilla-Keys:                                                                                 
Walter Williams wrote:

hi paul wondered if your friend francesco lanettie could find out who the
racing team is that has the rotary engines with titanium rotors and if they
are working out.  i have some OMC single rotors that are all aluminum.  the
side housings  i have been told have nickasil coating and the rotor housing
has tungsten carbide.  they are beautiful and show only .0005 wear.   the
rotor housing cant even be scratched with any of the sanding papers i have.
when i locate a parts source for the little engines i am going to rebuild
them and power one of my bd5 s .   i only need some springs and seals and
bearings.   it sure looks like this coating would solve the al side housing
wear problems for the 13B as well.   thanks walt.

As I recall Francesco told me they gave up on titanium rotors.
Too much heat transfer causes a loss of power. Now I don't
know if a ceramic coating on the titanium rotors would recover
some of that HP. Titanium rotors should allow the engine to run 
up to 12,000 RPM or so I would guess.
 
Paul Lamar
 
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