X-Mozilla-Keys:                                                                                 

Peter Johnson wrote:

Hello.  A friend of mine has spent the last while debugging his KR Special.
 He's pushing 170+ with a 65 hp Rotax 582.  One of the biggest problems he
had was jetting at high speed.  With time in the cockpit he finally
discovered his problem and it was something which I think we could benefit
from.

In a nutshell, everytime the thermostat opened on his engine, the resulting
hot air flowing out of his rad entered his engine air intake and created a
rough running engine.

Keep this in mind when designing air flow through the cowl.
mailto:pjohnson@voyageur.ca

Hi Peter;

"The hot air from inside the radiator was ingested by 
the  engine intake"? How was the hot air available to 
begin with? Where is the relief valve dumping?....I'm 
missing something here, please elaborate further.
                   
                               Thanks--Butch Diaz Sr.
 
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