Today's Message Index:
----------------------
1. 12:51 AM - Re: ROTAX 912 AIR VENT LINE (conrad)
2. 06:24 AM - Re: Re: ROTAX 912 AIR VENT LINE (Hugh)
3. 06:31 AM - Re: ROTAX 912 AIR VENT LINE (Goodone)
4. 06:47 AM - Re: Re: ROTAX 912 AIR VENT LINE (paul wilson)
5. 07:21 AM - Re: Re: ROTAX 912 AIR VENT LINE (LarryMcFarland)
6. 07:34 AM - Re: Re: ROTAX 912 AIR VENT LINE (Robert C Harrison)
7. 08:05 AM - Re: Re: ROTAX 912 AIR VENT LINE (rparigor@suffolk.lib.ny.us)
8. 03:11 PM - Re: Re: ROTAX 912 AIR VENT LINE (Robert C Harrison)
9. 03:39 PM - Re: ROTAX 912 AIR VENT LINE (conrad)
Message 1
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| Subject: | Re: ROTAX 912 AIR VENT LINE |
Goodone
Please do not alter these vent tubes.
They connect to the top of the float chamber. Repositioning these tubes can alter
the pressure on top of the float chamber which will affect the mixture.
They need to see the atmospheric pressure in the area of the air filter.
Conrad
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=228126#228126
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| Subject: | Re: ROTAX 912 AIR VENT LINE |
Goodone:
Conrad is exactly right about altering the location of the carb. vent line.
I don't know how your engine is set up in your airplane, but what ever the
set up is, the open end of each vent tube on the 912 must be near each of
the air filters respectively so they will be sensing the atmospheric
pressure at that point. The photo I sent you shows the position of the tubes
on my particular plane which is a fully cowled Allegro 2000.
Hugh McKay
Allegro 2000
Rotax 912UL
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Goodone
Sent: Sunday, February 01, 2009 5:30 PM
Subject: RotaxEngines-List: Re: ROTAX 912 AIR VENT LINE
The vent line just a piece of clear plastic tubing and I want to make it a
few inches longer. I am afraid that if I order it from someone like Lockwood
I will be stuck with an expensive piece of clear plastic tubing that is too
short (120mm) for what I want to do.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=228066#228066
Checked by AVG - www.avg.com
20:03:00
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| Subject: | Re: ROTAX 912 AIR VENT LINE |
Conrad
I just want to extend the length of each tube about 2 or 3 inches to get the tube
ends back nearer the air filter. One of the tubes now ends directly over the
exhaust pipe and I don't like the thought of fuel going through the vent and
dripping onto the exhaust pipe. I do not have carb drip pans at the present time.
Thanks,
Jim
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=228145#228145
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| Subject: | Re: ROTAX 912 AIR VENT LINE |
Conrad is correct. the location and outlet of the plastic tube must
not be changed.
I have been told that one can put a tee on the tube at exactly the
same height as the original tubing then on the other leg of the tee
one can extend it to any length. I guess the theory is correct
pressure will be preserved. I cannot say that I have any first hand
knowledge that this will work. Has anybody done this trick?
Paul
========
At 12:49 AM 2/2/2009, you wrote:
>
>Goodone
>Please do not alter these vent tubes.
>They connect to the top of the float chamber. Repositioning these
>tubes can alter the pressure on top of the float chamber which will
>affect the mixture.
>They need to see the atmospheric pressure in the area of the air filter.
>
>Conrad
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=228126#228126
>
>
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| Subject: | Re: ROTAX 912 AIR VENT LINE |
Paul,
I did a similar thing. Letting the tube terminate in a much larger
diameter tube to avoid suction from the reducer and long tube that
passed just below
the firewall. Ambient pressure of the large tube allows overflowing fuel
to get below and behind the exhaust yet doesn't pull fuel from the carb.
Larry McFarland 601HDS at www.macsmachine.com
paul wilson wrote:
>
> Conrad is correct. the location and outlet of the plastic tube must
> not be changed.
> I have been told that one can put a tee on the tube at exactly the
> same height as the original tubing then on the other leg of the tee
> one can extend it to any length. I guess the theory is correct
> pressure will be preserved. I cannot say that I have any first hand
> knowledge that this will work. Has anybody done this trick?
> Paul
> ========
> At 12:49 AM 2/2/2009, you wrote:
>> <conrad@conairsports.co.uk>
>>
>> Goodone
>> Please do not alter these vent tubes.
>> They connect to the top of the float chamber. Repositioning these
>> tubes can alter the pressure on top of the float chamber which will
>> affect the mixture.
>> They need to see the atmospheric pressure in the area of the air filter.
>>
>> Conrad
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=228126#228126
>>
>>
>>
>>
>
Message 6
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| Subject: | Re: ROTAX 912 AIR VENT LINE |
Yes Paul
I was concerned that the cowl intake area was likely to produce some ram
air effect too close the 914 filter intake so I put a "tee" in place and
pick up two pressure positions in the cowl quadrant under my intercooler
area.
Regards
Bob Harrison G-PTAG
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of paul
wilson
Sent: 02 February 2009 14:35
Subject: Re: RotaxEngines-List: Re: ROTAX 912 AIR VENT LINE
Conrad is correct. the location and outlet of the plastic tube must
not be changed.
I have been told that one can put a tee on the tube at exactly the
same height as the original tubing then on the other leg of the tee
one can extend it to any length. I guess the theory is correct
pressure will be preserved. I cannot say that I have any first hand
knowledge that this will work. Has anybody done this trick?
Paul
========
At 12:49 AM 2/2/2009, you wrote:
<conrad@conairsports.co.uk>
>
>Goodone
>Please do not alter these vent tubes.
>They connect to the top of the float chamber. Repositioning these
>tubes can alter the pressure on top of the float chamber which will
>affect the mixture.
>They need to see the atmospheric pressure in the area of the air
filter.
>
>Conrad
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=228126#228126
>
>
Message 7
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| Subject: | Re: ROTAX 912 AIR VENT LINE |
Hi Bob
"> I was
concerned that the cowl intake area was likely to produce some ram
> air effect too close the 914 filter intake so I put a
"tee" in place and
> pick up two pressure positions in
the cowl quadrant under my intercooler
> area."
Please clarifiy, what exactly are you plumbing on your 914 to cowl
quadrant?
Thx.
Ron Parigoris
Message 8
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| Subject: | Re: ROTAX 912 AIR VENT LINE |
Hi! Ron
I just may have "picked the grimy end of the poker" and mistaken what
sensor is affected. However the one to which I refer is necessary to be
located cabin side of the firewall but sense pressure at the intake.
The cowl "quadrant" is the area to the lower starboard side of the
inside of the cowl which is sectioned off below the intercooler where
the intake air enters the filter and the overspill passes through the
intercooler heat exchanger up into the upper cowl.
Sorry it is a bit complicated.
Regards
Bob Harrison.G-PTAG
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of
rparigor@suffolk.lib.ny.us
Sent: 02 February 2009 15:51
Subject: RE: RotaxEngines-List: Re: ROTAX 912 AIR VENT LINE
Hi Bob <mailto:Bob@tiscali.co.uk>
"> I was concerned that the cowl intake area was likely to produce some
ram
> air effect too close the 914 filter intake so I put a "tee" in place
and
> pick up two pressure positions in the cowl quadrant under my
intercooler
> area."
Please clarifiy, what exactly are you plumbing on your 914 to cowl
quadrant?
Thx.
Ron Parigoris
Message 9
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| Subject: | Re: ROTAX 912 AIR VENT LINE |
Bob,
You are confusing people here.
What was being discussed was the carb vent tube on a 912 engine.
They need to see atmospheric pressure near the air filter.
You have a 914 it has a rather more complicated pressure system on the float chambers.
On top of that it has two pressure sensors that measure atmospheric and
airbox pressures.
What does needs to be clear is that altering the pressure in the float chamber
on a bing 64 will alter the mixture no matter which engine you have.
Conrad.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=228232#228232
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