> I filled out the Omega order form to get a catalog and some posters. I got
 > the posters OK but no catalogue yet. I called them on Thursday and was on
 > hold for ten minutes and then had to leave. I ported the housings today and
 > am running out of time to install the thermocouples near the leading plugs.
 > It can be done but there is little room to operate in that area. If they
have
 > a very short probe it will be easy. I was thinking of insulating all but
the
 > tip with heat shrink tubing. You're interested in the coolant temp how far
 > away from the chamber wall? The backup engine goes together Monday, so it
 > won't be in this one.
 >
 > Lynn E. Hanover.

 Too bad Lynn I was counting on you for some good data. Omega has a whole
slew
 of products that will work. Some are ceramic coated. To be useful the probe
 needs to be with in 2 mm of the combustion chamber surface right adjacent
 to the leading spark plug. If you are reading this in time and are still
interested
 I can give you some part numbers out of the Omega catalog. I assume these
are  12A rotor housings.

 Paul Lamar

At Curtiss-Wright/Deere/RPI, we always used spring loaded thermocouples to
measure metal temperature. You want to make sure that the thermocouple is in
firm contact with the metal (and it should be down a dry hole, not in the
coolant passage). Any material that gets between the metal and the
thermocouple will insulate it and change the results.

Jon Lauter
Rotary Power Marine Corporation

Good points Jon thanks.

Paul Lamar
 
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