Lonnie Wood wrote:

----------

Bill Freeman wrote:

Ed,

I think you misunderstood my sloppy shorthand
comment.

I agree with you - I was pointing out that *aircooled* heaters are
harder to do.   Clearly this is a substantial advantage
of liquid cooling.  OTOH, there are a lot of disadvantages
too.

Bill

Anderson Ed wrote:

Bill,
  Actually I found installing a small oil cooler in the cockpit as

a

cabin heater using heated coolant fluid works just fine.  Plus you avoid
(it does occur)the all too real potential for carbon monoxide poisoning
from a exhaust leak into the traditional exhaust heater muff.

Ed Anderson
RV-6A N494BW Rotary Powered

 For cabin heat on my Sportsman I have taken a different approach.
I have one of the radiators (evaporator cores) mounted in the right
aft engine compartment about 6 inches ahead of the firewall. I have
made a special stainless curved door that either dumps the hot air or
 when opened lets the hot air into 2 each 3.75" holes in the firewall.
As in all light planes in case of fire this door should be closed.
It has a high temp fibrefax seal on it.

I think it was Ed Anderson's plane that had an oil cooler mounted in
this posistion.

I do not yet know if this approach will work. If it does then it saved
the weight of a heater core and fan.

Lonnie

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