Today's Message Index:
----------------------
1. 04:36 AM - Re: 912 S/ULS compression ratio (Remi Guerner)
2. 05:45 AM - Re: 912 S/ULS compression ratio (Roger Lee)
3. 08:21 AM - Re: 912 S/ULS compression ratio (Remi Guerner)
4. 11:25 AM - unsteady oil pressure (ronlee)
5. 11:46 AM - Re: unsteady oil pressure (Roger Lee)
6. 11:56 AM - Re: unsteady oil pressure (Pete Christensen)
7. 02:39 PM - Re: unsteady oil pressure (Duncan & Ami)
8. 04:47 PM - Re: unsteady oil pressure (Roger Lee)
Message 1
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| Subject: | Re: 912 S/ULS compression ratio |
Hi Roger,
I am not convinced by your reply. The change to 11:1 was clearly made on purpose
as the writer draw a vertical line on the left side of the text to highlight
the change. So Rotax clearly says that the compression ratio is now 11:1. The
question is: was the previous figure (10.5:1) true or wrong?
If it was true, that means they have made a physical modification somewhere.
Remi
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=328384#328384
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| Subject: | Re: 912 S/ULS compression ratio |
I emailed Rotax and got a reply. It is a typo and nothing more. They just missed
it. Chalk it up to a poor proof read. jacking that up from 10.5 to 11.0 would
have been a really big deal to them and us.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=328392#328392
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| Subject: | Re: 912 S/ULS compression ratio |
Ok, thanks Roger, I suppose they will make a correction on the next edition of
this manual. Wait and see!
Remi
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=328421#328421
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| Subject: | unsteady oil pressure |
The last two flights my oil pressure after hot has begun to jump around. At the
top end it is the same as it has always been, at 58 PSI hot. It stays there most
of the time but occasionally it will bounce from 49-55-58 and then sit on
58 for a while. I know the senders have a tendency to go bad. Any suggestions
of a more durable, cheaper one to use? Any suggestions of any other mechanical
problems that would cause the problem.
--------
Ron Lee
Tucson, Arizona
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=328461#328461
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| Subject: | Re: unsteady oil pressure |
Hi Ron,
Haven't heard from you in a while. Hope everything is good.
I would recommend the new parts for the oil pressure regulation. This could be
a gauge issue, but the swings are still close enough not to be.
Here are the part numbers for the new Rotax parts. It takes 5 minutes to install.
This has stabilized many an oil pressure as that is what it was originally
designed for and it may raise your pressure 5 psi or so. I have installed these
in at least 20 aircraft. These parts cost about $75
Rotax parts: cap screw 841-983,
Spring 838-122, and oil pressure regulator cone 857-230
Stop on by Ryan some time. We all fly at least twice a week and head out for our
breakfast runs all over AZ.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=328464#328464
Message 6
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| Subject: | Re: unsteady oil pressure |
I had a similar problem and it turned out to be bad ground connection.
Pete
Kitfox III, 912
Leander, TX
On 1/25/2011 1:20 PM, ronlee wrote:
> --> RotaxEngines-List message posted by: "ronlee"<rlee468@comcast.net>
>
> The last two flights my oil pressure after hot has begun to jump around. At the
top end it is the same as it has always been, at 58 PSI hot. It stays there
most of the time but occasionally it will bounce from 49-55-58 and then sit on
58 for a while. I know the senders have a tendency to go bad. Any suggestions
of a more durable, cheaper one to use? Any suggestions of any other mechanical
problems that would cause the problem.
>
> --------
> Ron Lee
> Tucson, Arizona
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=328461#328461
>
>
Message 7
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| Subject: | unsteady oil pressure |
I have 400 hours on one of these:
http://www.aircraftspruce.com/catalog/inpages/microflight1000.php
although the sensor is 'remotely' mounted.
Anyone want to buy an unused Rotax sender?!
Duncan McF
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of ronlee
Sent: 25 January 2011 19:21
Subject: RotaxEngines-List: unsteady oil pressure
The last two flights my oil pressure after hot has begun to jump around. At
the top end it is the same as it has always been, at 58 PSI hot. It stays
there most of the time but occasionally it will bounce from 49-55-58 and
then sit on 58 for a while. I know the senders have a tendency to go bad.
Any suggestions of a more durable, cheaper one to use? Any suggestions of
any other mechanical problems that would cause the problem.
--------
Ron Lee
Tucson, Arizona
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=328461#328461
Message 8
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| Subject: | Re: unsteady oil pressure |
Grounds certainly do cause gauge swings, but usually they are a little wider apart
than Ron's. Ron you can try to tighten all the grounds, but I don't think
that will cure this, but who knows. Grounds are considered loose until you put
a wrench on them. Remember finger tight, wrench loose. I would still put the
other Rotax parts in no matter what you find.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=328503#328503
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