Today's Message Index:
----------------------
1. 06:46 AM - Re: RotaxEngines-carb sync (droadrunner)
2. 08:49 AM - Re: Re: RotaxEngines-carb sync (Guy Buchanan)
3. 08:56 AM - Re: Engine Vibration (Roger Lee)
4. 01:22 PM - Re: Re: RotaxEngines-carb sync (CHESTERMAN FARM EQUIPMENT INC)
5. 04:33 PM - Re: Re: RotaxEngines-carb sync (ElleryWeld@aol.com)
6. 04:42 PM - Re: Re: Engine Vibration (Hugh)
Message 1
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| Subject: | Re: RotaxEngines-carb sync |
I am new to Rotax, having recently left Lycoming in a
Cheorkee. I just bought a CGS Hawk with a 582. I
realize that this discussion has been about the 912,
but am wondering if it is applicable to the 582 as
well. With the location of the prop, how do you do
anything on these engines with it running? On mine, I
would not stand between the wing and the prop. Should
I remove the prop to adjust/calibrate the carbs?
Thanks,
Marlin-droadrunner
Looking for last minute shopping deals?
Message 2
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| Subject: | Re: RotaxEngines-carb sync |
At 06:46 AM 12/31/2007, you wrote:
>Should
>I remove the prop to adjust/calibrate the carbs?
Marlin,
I am told it is very dangerous to run the 582 without some
kind of flywheel, as it will overspeed quite easily. Most adjust the
carbs on the 582 mechanically, and don't balance volumetrically. I
don't know if it's just laziness or if anyone has proven balancing
unnecessary, but I've never heard of anyone making the effort like
they do on the 912.
Guy Buchanan
San Diego, CA
K-IV 1200 / 582-C / Warp / 100% done, thanks mostly to Bob Ducar.
Message 3
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| Subject: | Re: Engine Vibration |
Hi Guys,
If you have never balanced your prop it should be done. It should be statically
balanced first. This means off the plane with the hub and all. Then you should
make sure it is tracking properly. This means each blade is turning in the same
plane while rotating. Last, but the most important every prop on a plane should
be dynamically balanced. This means using an instrument to check the vibration
against its weight and balance while it is running at its cruise rpm. You
should also check the blades to make sure they are the exact same pitch with
a prop protractor.
When I got my Flight Design CT I put a Warp drive on it. When it was dynamically
balanced it was .33" out. That's a lot. Weight was added to one side and now
it's only .01 out. Huge difference. The .33" out of balance was not felt in the
stick. If you can feel a prop out of balance through the stick then it is way
out. This is hard on many different parts of your engine and even the mounts.
If you have never statically and dynamically balanced your prop that would
be a priority if it were me. The longer a system runs out of balance to bigger
the toll later.
--------
Roger Lee
Tucson, Az.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=155192#155192
Message 4
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| Subject: | Re: RotaxEngines-carb sync |
you will get fine results from setting the carbs with the engine stopped.
stop engine---remove the airfilter, apply throttle until the front edge of
the slide is just flush with the bore. adjust your cables on top of carb
until both slides are flush the same amount.
tighten the cable and recheck, now go full throttle and make sure the
back edge of the slide clears the bore. if not you need tighter cables and
readjust again.
now that the carbs are set the same at part throttle you need to adjust the
idle stop screws so both slides begin moving at the same time when going
from idle to part throttle. adjust the side that moves first by turning in
the screw. when both slides start the move at exactly the same time you are
done. put on filter and start engine to check for proper idle rpm.
thats about it. go flying
dave chesterman 701-582 with way too much experiance with 2 strokes
----- Original Message -----
From: "droadrunner" <droadrunner58@yahoo.com>
Sent: Monday, December 31, 2007 9:46 AM
Subject: RotaxEngines-List: Re: RotaxEngines-carb sync
> <droadrunner58@yahoo.com>
>
> I am new to Rotax, having recently left Lycoming in a
> Cheorkee. I just bought a CGS Hawk with a 582. I
> realize that this discussion has been about the 912,
> but am wondering if it is applicable to the 582 as
> well. With the location of the prop, how do you do
> anything on these engines with it running? On mine, I
> would not stand between the wing and the prop. Should
> I remove the prop to adjust/calibrate the carbs?
> Thanks,
> Marlin-droadrunner
>
>
> Looking for last minute shopping deals?
>
>
>
Message 5
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| Subject: | Re: RotaxEngines-carb sync |
it can be a pain in the butt it takes much longer to work on planes of that
configuation but I would sync the carbs believe me it will be better for the
engine in the long run and you will have peice of mind knowing that it is well
taken care of I have done it to Kolbs Tbirds and others I dont like doing them
but its what keeps you up in the air
Just my personal Thoughts
Ellery In Maine
do not archive
(http://food.aol.com/top-rated-recipes?NCID=aoltop00030000000004)
Message 6
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| Subject: | Re: Engine Vibration |
Roger:
Tracking and setting the pitch on my three blade prop assembly is not a real
problem. I do this on my plane with the plane level and in the hanger.
However, do you have any good ideas on how to set up a three blade WoodComp
prop, Klassic 160/3/R (hub and bolts) for static balance? Seems to me one
would need a mating flange to bolt the prop/hub assembly to. This assembly
would then need to be concentrically bolted to a shaft that is in a bearing
assembly that allows free rotation of the entire setup. Then, how does one
statically balance a three blade prop?
The other question is, how on earth does one dynamically balance such a prop
assembly (three blade) while running at cruise speed?? Kind of hard to do in
the air!! The WoodComp manual that came with the three blades states " each
propeller (blades and hub) was factory assembled from blades with the same
weight and center of gravity, then carefully balanced. Make sure you insert
each blade into the appropriate opening in the center hub, blades and
openings are numbered and MUST NOT be mixed under any circumstances!" No
clarifying statement as to whether this is a static or dynamic balance. I
suspect it is a static balance, but I don't really know. If this is not
sufficient, again I ask, how does one ordinary LSA pilot dynamically balance
such an assembly??
Hugh McKay
Allegro 2000
Rotax 912UL
N661WW
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Roger Lee
Sent: Monday, December 31, 2007 11:56 AM
Subject: RotaxEngines-List: Re: Engine Vibration
Hi Guys,
If you have never balanced your prop it should be done. It should be
statically balanced first. This means off the plane with the hub and all.
Then you should make sure it is tracking properly. This means each blade is
turning in the same plane while rotating. Last, but the most important every
prop on a plane should be dynamically balanced. This means using an
instrument to check the vibration against its weight and balance while it is
running at its cruise rpm. You should also check the blades to make sure
they are the exact same pitch with a prop protractor.
When I got my Flight Design CT I put a Warp drive on it. When it was
dynamically balanced it was .33" out. That's a lot. Weight was added to one
side and now it's only .01 out. Huge difference. The .33" out of balance was
not felt in the stick. If you can feel a prop out of balance through the
stick then it is way out. This is hard on many different parts of your
engine and even the mounts. If you have never statically and dynamically
balanced your prop that would be a priority if it were me. The longer a
system runs out of balance to bigger the toll later.
--------
Roger Lee
Tucson, Az.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=155192#155192
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