Paul,
  What is the preferred design for a cabin heater using the
 rotary?  Do you
  use the oil or the water?  What about an oil to water
 cooler using an
  external water circuit?  I am building a
 pusher.  Thanks for any help.

  Joe Berki
  Limo EZ

  Perry Mick uses an oil cooler under the cockpit
  on his Long as I recall.


  Paul Lamar

  Joe,

 The highest temps are from the exhaust.  A water
 exchanger will require a
 heater core, a fan, lots of coolant hose, and a gallon or
 two of H2O. If it
 springs a leak, you could be faced with scalding hot water
 being sprayed on
 your legs/feet, and at minimum, a fogged up
 windscreen.  Bottom line... an
 exhaust heat muff provides the most heat for the least
 weight penalty.  If
 you do go that route, spring for a CO detector.

 Mark S.

 I personally would prefer a little fog to a lethal
dose of carbon monoxide.  Coolant heat exchangers have
been used since the early part of the 20th century and
failures are rare.  Failures are generally the result
of sloppy maintenance, ie not periodically changing and
flushing the cooling system and not replacing hoses.

Coolant heaters have always been a useful tool to
help dissipate  high coolant temperatures.

Joel



My vote is for the good old H2O heater core.  I know that's what I'm
going to install my rotary plane project this winter.  A short time back
I lost two of my friends, one who was my flight instructor, due to an
exhaust leak in his Piper.  The plane just went through an annual before
the crash into the side of a mountain.  Both pilots where overcome by CO
(autopsy proven). I agree with Joel 100 %.  I have been driving vehicles
for 41 years and have never had a heater core leak.  As Joel said,
maintenance is the key.

Bob
N164WF


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