Today's Message Index:
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1. 01:27 AM - Re: Rotax 914 Won't Start (pasj66)
2. 04:58 AM - Propeller inertia (Richard Girard)
3. 07:10 AM - Re: Propeller inertia (lucien)
4. 09:08 PM - Rotax Training Requirements and Your LSA (Roger Lee)
5. 10:37 PM - Re: Rotax Training Requirements and Your LSA (Craig Payne)
Message 1
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| Subject: | Re: Rotax 914 Won't Start |
Hello all,
fwiw check starting technique compared with the below document
http://www.rotax-aircraft-engines.com/pdf/dokus/d04645.pdf
throttle at idle and control rpm with choke until warm. I have a installation with
4 EGTs and the temp distribution is quite sensitive to the choke when cold.
Good luck
Best regards
Patrik
--------
MCR R100, R914UL3 W/IC
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http://forums.matronics.com/viewtopic.php?p=279190#279190
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| Subject: | Propeller inertia |
Once again the subject of propeller inertia has reared it's head. Has anyone
EVER found a propeller that falls outside the range of the "C" and "E" 2
stroke gearboxes and the 912 engine (6000 kg(cm squared)) by performing the
test in SI 11ul91 E? My experience is limited by the props I own which
includes a 3 blade Warp Drive and a 4 blade Power Fin as well as several 2
blade wood props from TPI and Culver. All of them passed, although despite
popular mythology my 2 blade 68" wood Culver tested almost as high as the
66" 3 blade (straight blades, no nickle covers) with the HP-L hub.
I don't expect that there are NO propellers that exceed the limit, I've just
never seen anyone, except me, (look in the Kolb forum archives from early
2007) post that they actually tested a prop and the result.
Rick Girard
Message 3
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| Subject: | Re: Propeller inertia |
rickofudall wrote:
> Once again the subject of propeller inertia has reared it's head. Has anyone
EVER found a propeller that falls outside the range of the "C" and "E" 2 stroke
gearboxes and the 912 engine (6000 kg(cm squared)) by performing the test in
SI 11ul91 E? My experience is limited by the props I own which includes a 3 blade
Warp Drive and a 4 blade Power Fin as well as several 2 blade wood props
from TPI and Culver. All of them passed, although despite popular mythology my
2 blade 68" wood Culver tested almost as high as the 66" 3 blade (straight blades,
no nickle covers) with the HP-L hub. I don't expect that there are NO propellers
that exceed the limit, I've just never seen anyone, except me, (look
in the Kolb forum archives from early 2007) post that they actually tested a prop
and the result.
>
>
> Rick Girard
>
The IVO medium in 3-blades is a popular choice and I wouldn't be surprised if it
exceeded 6000 kg/cm3. When I took mine off it was like pulling a bowling ball
off the back of the plane. In fact, the weight reduction compared to my powerfin
was so much I had to redo the W&B (9.2 lbs lighter overall) and the plane
flies noticeably differently (CG moved forward nearly an inch).
Didn't measure the MOI, tho my 912 was instantly happier at all rpm's and power
levels when it was replaced with the powerfin.
I had a WD 68" 3 blade on the plane for a while too, but it had to go because of
a harmonic vibration problem I couldn't get rid of. Its rotating mass was also
significantly less than the IVO medium (and yes contrary to myth, the WD is
within the 6000 kg/cm3 MOI limit).
Also keep in mind that extensions worsen the situation with any prop, as they add
arm to the Coriolis forces exerted on the prop shaft. Rotax limits the permissible
length of extension for that reason (a little over 4" IIRC).
So you want as light as possible especially with an extension.
LS
--------
LS
Titan II SS
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http://forums.matronics.com/viewtopic.php?p=279210#279210
Message 4
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| Subject: | Rotax Training Requirements and Your LSA |
Rotax Training Requirements and Your LSA
Don't be misinformed here is an article with the real facts. Be one of the informed
on LSA maintenance and your Rotax engine.
Article by Carol Carpenter of Rainbow Aviation.
http://www.rainbowaviation.com/artic...20training.pdf
This is a must read for the LSA community.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center
520-574-1080
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=279353#279353
Message 5
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| Subject: | Rotax Training Requirements and Your LSA |
The complete URL is:
http://www.rainbowaviation.com/articles/draft%20rotax%20training.pdf
Or as a tiny URL:
http://tinyurl.com/yfgwjsr
-- Craig
-----Original Message-----
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Roger Lee
Sent: Wednesday, December 30, 2009 9:08 PM
Subject: RotaxEngines-List: Rotax Training Requirements and Your LSA
--> <ssadiver1@yahoo.com>
Rotax Training Requirements and Your LSA
Don't be misinformed here is an article with the real facts. Be one of the
informed on LSA maintenance and your Rotax engine.
Article by Carol Carpenter of Rainbow Aviation.
http://www.rainbowaviation.com/artic...20training.pdf
This is a must read for the LSA community.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated Rotax Repair Center 520-574-1080
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=279353#279353
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