Today's Message Index:
----------------------
1. 01:04 AM - Re: carburetor ice and electric carb. heater (Dave Grosvenor - DreamWings)
2. 05:01 AM - Re: RotaxEngines-List Digest: 1 Msgs - 04/13/06 (Tim Perkins)
3. 08:11 PM - exhaust on the 912 (Jack Kuehn)
Message 1
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| Subject: | Re: carburetor ice and electric carb. heater |
--> RotaxEngines-List message posted by: "Dave Grosvenor - DreamWings" <dave@dreamwings.co.za>
Thom
These guys sell a water based carb heater.
http://www.skydrive.co.uk/sd_sa_ch.asp Hot water from your engine is used
to heat the throat of the carb.
Dave
----- Original Message -----
Subject: RotaxEngines-List: carburetor ice and electric carb. heater
> From: "Thom Riddle" <jtriddle@adelphia.net>
>
> --> RotaxEngines-List message posted by: "Thom Riddle"
> <jtriddle@adelphia.net>
>
> Although Rotax 912 series engines with the Bing 64 carburetors are not
> very prone
> to carburetor ice, it does happen under some conditions. On the return
> trip
> from Clarksville, Tennessee to Buffalo, New York this past Monday. I
> experienced
> carb. ice when approaching the relatively high humidity region near Lake
> Erie.
> We were cruising at 5,500' msl at 5,200 rpm when I noticed a slow descent
> and lower engine RPM (5,000 rpm). The OAT was about 43F (6C), nearly ideal
> conditions
> for carb. ice with high humidity.
>
> Since our engine is not equipped with carb. heat, I advanced the throttle
> but no
> change in power or RPM and we kept descending slowly. The engine was
> obviously
> developing less power than two mintues before but there was no indication
> other
> than the lower RPM and lack of increase with full throttle. I cycled the
> throttle to idle and back to full throttle a couple times and it cleared
> up completely
> without skipping a bit and never returned for the remainder of the 600nm
> flight.
>
> Moral of story is when in high humidity conditions keep a watchful eye on
> RPM when
> cruising. If you catch it early it can usually be cleared very easily and
> quickly on this type carb. by cycling the throttle to idle and back a
> couple of
> times. Once the ice starts building up it continues to build up rapidly
> and
> becomes serious very quickly if not dealt with early.
>
> I've heard someone makes an electric carb. heater for the Bing 64 but
> don't know
> who sells them. Anyone out there know abou this and a source? I know the
> HKS
> engine importer in the USA sells a 12 watt one for the HKS which uses the
> Bing
> 64 carbs. but I don't think that is enough power to de-ice a carb once the
> ice
> starts forming. I've heard there is a 60 watt model available somewhere.
>
> Thom in Buffalo
>
>
Message 2
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| Subject: | RE: RotaxEngines-List Digest: 1 Msgs - 04/13/06 |
--> RotaxEngines-List message posted by: "Tim Perkins" <Timothy.Perkins@uvm.edu>
> Although Rotax 912 series engines with the Bing 64
> carburetors are not very prone to carburetor ice, it does
> happen under some conditions. On the return trip from
> Clarksville, Tennessee to Buffalo, New York this past Monday.
> I experienced carb. ice when approaching the relatively high
> humidity region near Lake Erie.
What type of aircraft you flying Tom?
Tim Perkins, VT
Message 3
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| Subject: | exhaust on the 912 |
--> RotaxEngines-List message posted by: Jack Kuehn <jkuehn@mountaintime.myrf.net>
I am new to the list, and I have a question: My Rotax 912 UL has 40
hours on it, and the exhaust outlet is black, and a finger swipe inside
the outlet comes out sooty black. Is this normal? My home field is at
3600' and I regularly fly between 5500 and 9500. Is the mixture too
rich? I have the 2.27:1 gear reduction and run 87 octane autogas.
Mobil MX4T Synthetic motorcycle oil and an oil thermostat. Temps all
run very normal, engine performs well. What do others see?
Thanks,
Jack
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