From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of David Carter
Sent: Tuesday, July 25, 2006 5:21
PM
To: Rotary
motors in aircraft
Subject: ***SPAM*** [FlyRotary]
Re: More cooling Tests
----- Original Message -----
Sent: Tuesday, July 25, 2006 9:41 AM
Subject: [FlyRotary] Re: More cooling Tests
Thanks
for the link Steve. Interesting stuff.
Bob W.
The closer to pure (distilled) water the
better the heat transfer rate. If higher boiling temps are required then a 10%
glycol water mixture with a teaspoon of dishwashing soap or Redline Water
Wetter and a 22 pound pressure cap on a pressure make up tank.
For radiant heat transfer make up some
rectangles of .015" stainless with three tabs on each end. Roll the sheet
into a half tube shape. Bend the tabs into a "Z" shape and use a
1/4" hose clamp to hold each set of tabs to the exhaust pipe. Just a
3/4" space between the pipe and the shield is enough to break the radiant
path.
The hot rod heat wrap tape works great,
but the pipe needs to be thick walled lest it decompose quickly. The pipe will
be running at your EGT, all of the time. Wet it before installing on curved
pipe. It conforms more easily. Let it dry before starting the engine.
I lace it with safety wire after
installation. It stays on for a race season, and makes an astounding difference
in under-hood temperatures.
Fuel temps too high make tuning
impossible. Been there, done that.