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ajroseca(at)nf.sympatico.
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 Posted: Sat Sep 27, 2008 6:53 am Post subject: Carburetor Ice ? |
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Hi Ralph
I think this problem may have to do with fuel flow...but I am not ruling
out carb heat..I flew all of last winter with no carb heat and did not have a problem
even on the coldest days..I found some dirt in my gas filter so I will clean it.
also clean the air filters I have a electric pump installed with a bypass valve
but did not turn it on as I was setting up a glide to the landing strip..the engine did not stop
It was just speeding up and slowing down
From now on I will keep the electric pump on to provide extra gas to the mechanical pump.
Also I will install 1/4 inch vent tubing on the top of each tank cap to vent better.
I have had the problem of the right tank supply going down before the left but this
has not been an issue..I will also check the float bowls on the carburetors to see
if there is any water or sediment..I use a mr funnel on all gas so I don't see any
water or cantamination in the gascolator or tank drains..I am doing some checks of the
fuel system today and will fly again over the airstrip.
Alvin
Alvin,
What you describe is not the usual carb ice symptoms although with 2 carbs
it could manifest that way.
I have had a power loss 6 times now which first thought was carb ice but now certain
caused by steep descent or unbalanced attitudes causing unporting of the
fuel feed. On separate occasions during ground running above damp grass I've
had carb ice and cleared it with carb ht. then let it occur again and clear again
just to confirm. My engine is a 2200 however it uses the same model of carb
as the 912 and although I see many not fitting a heat system its proved necessary
for me.
Ralph
--------
Ralph - CH701 / 2200a
[quote][b]
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kenryan(at)alaska.net
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| Posted: Sat Sep 27, 2008 7:27 am Post subject: Carburetor Ice ? |
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| Quote: | Previous post:
I flew all of last winter with no carb heat and did not have a problem
even on the coldest days
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I just want to chime in to remind everyone that
you don't need cold outside air temperature to
develop carb icing. As the intake air expands
going through the carburetor venturi the
temperature can drop 30 degrees. You can get
carb icing on a 60 degree day. I've seen it many
times.
On the other hand, when it is extremely cold,
there is very little moisture in the air and carb
icing is far less likely.
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