Today's Message Index:
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1. 02:09 AM - rotax 912 air filter tubing connection problem (Andrew McMenamin)
2. 03:20 AM - Re: rotax 912 air filter tubing connection problem (Paul Mulwitz)
3. 05:24 AM - Chat Tonight (George Race)
Message 1
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| Subject: | rotax 912 air filter tubing connection problem |
Hi List
We have recently purchased a Zenith XL 601 with Rotax 912 ULS. The air filter
is a standard Rotax circular filter PN 825 711 with an off-centre mounting for
the tube from the air box. The filter is mounted on the lower cowling and connected
to the air box by a tube. The problem is with the tube to air filter
connection. The tube has the correct internal diameter to fit the standard
Rotax air box but the other end is too big to fit the external diameter of the
air filter mounting. The tube is made of some form of rubberized material with
a series of circumferential rings keeping the section circular. Where it
meets the air filter connection the circular rings are too large and the tube
has a portion which has had the rings removed, and this is clamped onto the air
filter opening with a large "Jubilee" worm drive hose clamp. This clamp distorts
the circular air filter opening as it tightens, resulting in the tube
and the clamp potentially slipping off.
This does not seem a good design to me. I would have expected an adapter of some
form to fit into the air filter opening and adapt to the internal diameter
of the large tube.
Has anyone found the same problem and a solution?
I am posting this on the Rotax list and the Zenith XL 601 list.
Thanks
Andrew
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=335236#335236
Message 2
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| Subject: | Re: rotax 912 air filter tubing connection problem |
Hi Andrew,
I've been flying a Tecnam Echo Super with Rotax 912-ULS for the last two
years. It has no air box and no provision for carburetor heat. This
seems to work just fine. Since the carburetors are mounted on the top
of the engine I think they stay quite warm and carb heat just isn't needed.
Perhaps you can consider modifying your setup to bypass the whole air
box and use the normal filter mounting method.
Paul
Camas, WA
On 3/28/2011 1:46 AM, Andrew McMenamin wrote:
> --> Zenith601-List message posted by: "Andrew McMenamin"<andrew.mcmenamin@xtra.co.nz>
>
> Hi List
> We have recently purchased a Zenith XL 601 with Rotax 912 ULS. The air filter
is a standard Rotax circular filter PN 825 711 with an off-centre mounting for
the tube from the air box. The filter is mounted on the lower cowling and
connected to the air box by a tube. The problem is with the tube to air filter
connection. The tube has the correct internal diameter to fit the standard
Rotax air box but the other end is too big to fit the external diameter of the
air filter mounting. The tube is made of some form of rubberized material
with a series of circumferential rings keeping the section circular. Where
it meets the air filter connection the circular rings are too large and the tube
has a portion which has had the rings removed, and this is clamped onto the
air filter opening with a large "Jubilee" worm drive hose clamp. This clamp
distorts the circular air filter opening as it tightens, resulting in the tube
and the clamp potentially slipping off.
> This does not seem a good design to me. I would have expected an adapter of
some form to fit into the air filter opening and adapt to the internal diameter
of the large tube.
> Has anyone found the same problem and a solution?
> I am posting this on the Rotax list and the Zenith XL 601 list.
> Thanks
> Andrew
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=335236#335236
>
>
Message 3
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