Hi Ian !
Alarms are sounding !!! The "S" has a <special> intake manifold
AND a special exhaust system designed & supplied by ROTAX - if you
are not using that, you WILL NOT get anywhere NEAR 100 hp. !!!
If you use the Rotax manifold, you will already have warmer air,
as the aluminum will soak up some of the heat from the surrounding
air.
I've been flying the regular 912 in the Rebel for 11 years
now, and have never even been CLOSE to having carb ice ! If you have
any doubts, get an indoor/outdoor electronic thermometer (we used
Radio Shack), and put the probe in the engine compartment, right near
the air filter. This will give you cockpit air temp, and engine
intake air temp. We've never seen intake air cooler than about 15 C.,
even in winter - it's usually more like 30 C. in summer. All that
warm air means the engine is likely not producing as much power as
it might, BUT - there's NO chance of carb ice, so I can live with
THAT !!! :-)
Regulations in your area might insist on carb heat - if they
do, you can add a simple box on the muffler, but you will LIKELY
<NEVER> NEED IT !!! ( Rotax specifically advise against any additional
heat.)
You should never try to fly the 912 until the oil has reached
<at least> 120 F. - this can take as long as 20 minutes sometimes !
This is very important, as cool oil will cause an over-pressure
problem, AND steals a LOT of power, too ! If the oil is warm enough,
the air certainly will be, too !
You will LOVE the Rebel with the 912 ! I've had the GREAT
pleasure of test flying one with this setup recently, and it has
reinforced my love of the Rebel with the 912 - what a GREAT airplane !!
......bobp
------------------------------orig.---------------------------------
At 10:08 PM 9/6/01 +1000, you wrote:
G'day
I am now installing my Rotax 912S engine and would appreciate some advice.
Has anyone using a Rotax had any problem with carby ice?
I am using the standard carbs and airfilters (as supplied by MAM) and if
carby heat is required just how should I do it?
Thanks and regards
Ian Donaldson
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<DIV><FONT size=2>G'day</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><FONT size=2>I am now installing my Rotax 912S engine and would
appreciate some advice.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Has anyone using a Rotax had any problem with carby
ice?</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>I am using the standard carbs and airfilters (as supplied by
MAM) and if carby heat is required just how should I do
it?</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><FONT size=2>Thanks and regards</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><FONT size=2>Ian Donaldson</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV></BODY></HTML>
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