Forwarded from the bounce bin by John Cliff. Message is from Peter Bondar
<pb@tarantella.com>
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its boiling over,
either
a) you aren't cooling the engine enough, need more airflow/bifgger radiator
b) the glycol/water mix is too low with a depressed boiling point
c) you have a (partial) impeller pump failure (saw this on a 912 Avid)
d) you have a VP prop set on too fine or coarse pitch not driving enough air
through
some installations seem to do it habitually and just don't idle too much
some are VERY ambient temp sensisitive, on mine anytime
the ambient is over 20c it becomes an issue, under 20 no problem
also for taxying for test purposes
being uncowled is usally a lot better than cowled
peter
Peter Bondar, Vice President Marketing
Tarantella Inc.
email: pb@tarantella.com
web: http://www.tarantella.com
> After taxing around for a while my Rotax 912S has been "spitting" some
> coolant out of the overflow bottle. It also makes a gurguling sound.
>
> It seems that coolant runs back into the bottle through the hose in the
> bottom and pushing some coolant out through the tiny vent hole in the cap.
> It sends out enough coolant thats its visible on the side of the airplane.
> All temps are fine, the engine runs great, there are no other coolant leaks.
>
> Any Ideas?
>
> Thanks
>
> Bob Jacobsen
> A131
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