My 13b powered rv8a is coming along nicely... should be ready for
ground tests next week.

Scott Ingoldsby

Personal to Scott, very professional set up.  Good work.You probably
just haven't done it yet but a heat shield for your soon to be
glowing red/orange exhaust headers is a necessity. I have an old
Inconel shield from an Allison turbine that may work.It would add a
safety and performance factor by separating a possible fuel system
leak from a direct drop on the headers... and the O-rings and fuel
lines will last much longer being the cooler environment.

Barry Bordes



I would be interested in any thing that would help on my setup. how
do i get more info on the heat shield That Barry has?

Scott Ingoldsby

You will probably have to redo the cooling system as this did not
work well for the new Power Sport. A one degree increase in the
temperature of air going through the rad is a 1% reduction in
cooling. You need to get the rad as far away from the exhaust as
possible and protect it from the heat inside the cowl.

It is best to move the rad to the cool side of the engine.

Do you have a cowling yet?

Do you have my book "How to Cool Your Wankel"?

This important as at least one person has crashed when the engine
over heated on take off and blew all the coolant out.

Paul Lamar


Paul, thanks for the reply. I do have the James cowling which as you know
is ducted through the bottom over the oil cooler. tried to find your book
at aircraft parts store with no luck. What are your thoughts on cutting an
inlet in the front or side of my cowl and running the air duct back to a
shroud that completely covers the left half of the radiator?Air would only
enter from right side and be channeled to radiator on the right side. could
also open up an outlet on left side for hot air from exhaust to exit to out
side of cowl.. Your thought are much appreciated


Scott Ingoldsby

The cooling is marginal at best. Be sure to use a water pump to spray
water on the rad for the first flight if you need it. Nothing more
exciting than steam coming out of the cowling :)

Here are some pictures of the James cowl.

I will sell you a book direct.
Send $35 cash or a check made out to Lamar Instruments
to: Lamar
830 E santa maria st
suite 303
santa paula
CA 93060 .


Paul Lamar


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