Today's Message Index:
----------------------
1. 05:25 AM - Re: rOTAX 9112 ULS Mystery SOLVED ! ! ! (Catz631@aol.com)
2. 05:39 AM - Re: rOTAX 9112 ULS Mystery SOLVED ! ! ! (Roger Lee)
3. 07:27 AM - Re: rOTAX 9112 ULS Mystery SOLVED ! ! ! (Karen & Gale Derosier)
4. 07:49 AM - Re: rOTAX 9112 ULS Mystery SOLVED ! ! ! (David Weaver)
5. 09:00 AM - Re: Jim Feldmann Prop Failure (Jim Feldmann)
6. 09:13 AM - Re: Re: Jim Feldmann Prop Failure (rparigor@suffolk.lib.ny.us)
7. 09:14 AM - Re: Re: Jim Feldmann Prop Failure (FLYaDIVE)
8. 09:57 AM - Re: rOTAX 9112 ULS Mystery SOLVED ! ! ! (ray)
9. 11:13 AM - Re: Jim Feldmann Prop Failure (Jim Feldmann)
10. 11:23 AM - Re: Jim Feldmann Prop Failure (Jim Feldmann)
11. 07:25 PM - Re: Re: Jim Feldmann Prop Failure (Ellery Batchelder Jr)
Message 1
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| Subject: | Re: rOTAX 9112 ULS Mystery SOLVED ! ! ! |
John,
Ahh haa ! I thought it might be a plug problem but didn't think about the
cap not connecting. Thanks for sharing as that is another item I can add to
trouble shooting . Now if I could only remember !
Roger, stay young and sharp !
Dick Maddux
Milton,Fl
Message 2
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| Subject: | Re: rOTAX 9112 ULS Mystery SOLVED ! ! ! |
Hi Dick,
Nice to hear from you. Hope all is well.
The young part is the hard part. Still in a holding pattern at 39 (for 19 years),
if I could only make my wife believe it. :D
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center - Heavy Maint. Rated
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=375185#375185
Message 3
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| Subject: | Re: rOTAX 9112 ULS Mystery SOLVED ! ! ! |
I, to am happy with this group staying on topic. Everyone had great
suggestions for John which I will keep in my archives. John , I'm sure it
feels really good to have the help that you got.
Gale Derosier
RANS S6-S Coyote II
912 UL
On Sat, Jun 9, 2012 at 12:52 PM, JohnF <n29cx@ridgeviewtel.us> wrote:
> **
> First, let me thank everyone who gave me hints, suggestions, and views. I
> appreciate it far more than you might expect.
>
> I just suspected it was something I did because the engine was working
> just fine prior to starting the annual condition inspection. But what?
>
> I went over everything folks suggested with no positive results.
>
> I decided to pull the plugs that were too black, sand blast them and
> reinstall, or possible put back in the plugs that had been removed earlier.
>
> I never look into the spark plug boot, the part that connects the ignition
> wire to the top of the spark plug. I should have. When I pulled #4 bottom
> plug's wire boot it just didn't feel right, so I got a flashlight and
> examined the inside. There's a rather round receptacle and a small wire
> that crosses the receptor's "hole"....that was cocked sidways, so the top
> of the spark plug didn't get 'captured' by the little wire that normally
> slides across the top of the plug when you insert it. That's why you hear
> and feel that little washboard sound when inserting the plug.
>
> I straightened out the receptor, insured a good 'clicking' sound when
> re-inserting the boot and wrapped things up.
>
> The engine ran perfectly....all normal.
>
> I went back in my trouble shooting notes (I keep notes so I can recall
> what I have done, etc) and noted that on the very first run after finishing
> the inspection that the engine ran rough I found #4 bottom plug wire
> hanging down loose. I thought I had overlooked installing it. Now I see it
> just fell out.
>
> Now during trouble shooting the engine would run fine. Next morning it
> would not after reinstalling the cowling. Just putting on the cowling was
> enough to jostle the #4 plug wire to break the tenuous connection from the
> top of the plug to the interior of the boot.
>
> I fell so good I am going out for a pizza and a pint of beer.
>
> Again I can't say how much I appreciate all your help and suggestions.
>
> John
>
> *
>
> *
>
>
--
*Gale Derosier*
Message 4
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| Subject: | Re: rOTAX 9112 ULS Mystery SOLVED ! ! ! |
Thought I would comment on something else you may not be aware of when doin
g spark plug maintenance.- The terminal connector in the plug boot should
be coated with electrical connector grease.- Dry terminals where high vo
ltage is present combined with high humidity such as atmospheric-foggy co
nditions can contribute to-electrolysis in high voltage plug wire connect
ors(resulting voltage drop at connection will cause local hot spot-and ac
celerate electrolysis process leading to-destruction of connector base me
tals).- By preventing any moisture wetting of dissimilar base metals in t
he connection with application of appropriate grease, electrolysis can be p
revented.- A sound plug wire connection on the Rotax 912 is noted by an a
udible-clicking sound as the spark plug lead connector slips over the-s
park plug terminal threads.- If that sound is not-present, then close i
nspection of inside of-boot terminal is required.--
Dave Weaver-N912GR----
--- On Sat, 6/9/12, JohnF <n29cx@ridgeviewtel.us> wrote:
From: JohnF <n29cx@ridgeviewtel.us>
Subject: RotaxEngines-List: rOTAX 9112 ULS Mystery SOLVED ! ! !
First, let me thank everyone who gave me hints, suggestions, and views. I a
ppreciate it far more than you might expect.
-
I just suspected it was something I did because the engine was working just
fine prior to starting the annual condition inspection. But what?
-
I went over everything folks suggested with no positive results.
-
I decided to pull the plugs that were too black, sand blast them and reinst
all, or possible put back in the plugs that had been removed earlier.
-
I never look into the spark plug boot, the part that connects the ignition
wire to the top of the spark plug. I should have. When I pulled #4 bottom p
lug's wire boot it just didn't feel right, so I got a flashlight and examin
ed the inside. There's a rather round receptacle and a small wire that cros
ses the receptor's "hole"....that was cocked sidways, so the top of the spa
rk plug didn't get 'captured' by the little wire that normally slides acros
s the top of the plug when you insert it. That's why you hear and feel that
little washboard sound when inserting the plug.
-
I straightened out the receptor, insured a good 'clicking' sound when re-in
serting the boot and wrapped things up.
-
The engine ran perfectly....all normal.
-
I went back in my trouble shooting notes (I keep notes so I can recall what
I have done, etc) and noted that on the very first run after finishing the
inspection that the engine ran rough I found #4 bottom plug wire hanging d
own loose. I thought I had overlooked installing it. Now I see it just fell
out.
-
Now during trouble shooting the engine would run fine. Next morning it woul
d not after reinstalling the cowling. Just putting on the cowling was enoug
h to jostle the #4 plug wire to break the tenuous connection from the top o
f the plug to the interior of the boot.
-
I fell so good I am going out for a pizza and a pint of beer.
-
Again I can't say how much I appreciate all your help and suggestions.
-
John
Message 5
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| Subject: | Re: Jim Feldmann Prop Failure |
Regarding your question about my prop failure; it was a 2 year old GSC 3 blade.
All three blades departed the hub at the same time while cruising at about 2600
feet.
The NYSB studied the remains (all three blades were found within 30 feet of each
other on the ground) and could find no apparent cause.
My Kitfox was heavily damaged in the off field landing, but there were no injuriies.
--------
Jim Feldmann
Kitfox IV Speedster / 912 lost to prop failure
Looking for a project
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=375201#375201
Message 6
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| Subject: | Re: Jim Feldmann Prop Failure |
Hi Jim
Sorry to hear about your prop failure.
Curious, did your 912 overspeed and hurt itself?
If so what exactly got hurt?
Thx.
Ron Parigoris
Message 7
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| Subject: | Re: Jim Feldmann Prop Failure |
Jim:
There was a SB... Only because they do not write AD's for experimental's.
About blade separation at the hub. You may find this information on the
manufacturer's web site or under the FAA's AD List (Manufactures). The
engine should also be treated as if it had a Prop-Strike.
Barry
On Sun, Jun 10, 2012 at 11:59 AM, Jim Feldmann <feldesign@earthlink.net>wrote:
> feldesign@earthlink.net>
>
> Regarding your question about my prop failure; it was a 2 year old GSC 3
> blade. All three blades departed the hub at the same time while cruising
> at about 2600 feet.
>
> The NYSB studied the remains (all three blades were found within 30 feet
> of each other on the ground) and could find no apparent cause.
>
> My Kitfox was heavily damaged in the off field landing, but there were no
> injuriies.
>
> --------
> Jim Feldmann
> Kitfox IV Speedster / 912 lost to prop failure
> Looking for a project
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=375201#375201
>
>
Message 8
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| Subject: | Re: rOTAX 9112 ULS Mystery SOLVED ! ! ! |
I followed this story and what I don,t get is why the engine did not
develop full power or close to it with both mags hot.That is the premise
of dual ignition,plus the mag drop was excessive on both mags,why? One
mag was a 4 cylinder and the other was a 3 cylinder? I,m out of the
rotax area now and in to the lycoming but stay with this group for it
all around expertise in stuff like this.
----- Original Message -----
From: Karen & Gale Derosier
To: rotaxengines-list@matronics.com
Sent: Sunday, June 10, 2012 7:26 AM
Subject: Re: RotaxEngines-List: rOTAX 9112 ULS Mystery SOLVED ! ! !
I, to am happy with this group staying on topic. Everyone had great
suggestions for John which I will keep in my archives. John , I'm sure
it feels really good to have the help that you got.
Gale Derosier
RANS S6-S Coyote II
912 UL
On Sat, Jun 9, 2012 at 12:52 PM, JohnF <n29cx@ridgeviewtel.us> wrote:
First, let me thank everyone who gave me hints, suggestions, and
views. I appreciate it far more than you might expect.
I just suspected it was something I did because the engine was
working just fine prior to starting the annual condition inspection. But
what?
I went over everything folks suggested with no positive results.
I decided to pull the plugs that were too black, sand blast them and
reinstall, or possible put back in the plugs that had been removed
earlier.
I never look into the spark plug boot, the part that connects the
ignition wire to the top of the spark plug. I should have. When I pulled
#4 bottom plug's wire boot it just didn't feel right, so I got a
flashlight and examined the inside. There's a rather round receptacle
and a small wire that crosses the receptor's "hole"....that was cocked
sidways, so the top of the spark plug didn't get 'captured' by the
little wire that normally slides across the top of the plug when you
insert it. That's why you hear and feel that little washboard sound when
inserting the plug.
I straightened out the receptor, insured a good 'clicking' sound
when re-inserting the boot and wrapped things up.
The engine ran perfectly....all normal.
I went back in my trouble shooting notes (I keep notes so I can
recall what I have done, etc) and noted that on the very first run after
finishing the inspection that the engine ran rough I found #4 bottom
plug wire hanging down loose. I thought I had overlooked installing it.
Now I see it just fell out.
Now during trouble shooting the engine would run fine. Next morning
it would not after reinstalling the cowling. Just putting on the cowling
was enough to jostle the #4 plug wire to break the tenuous connection
from the top of the plug to the interior of the boot.
I fell so good I am going out for a pizza and a pint of beer.
Again I can't say how much I appreciate all your help and
suggestions.
John
ist"
target="_blank">http://www.matronics.com/Navigator?RotaxEngines-List
ttp://forums.matronics.com
_blank">http://www.matronics.com/contribution
--
Gale Derosier
Message 9
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| Subject: | Re: Jim Feldmann Prop Failure |
There was a single hard shake/knock/bang and the engine stopped. We discovered
that that it instantly shook both carbs off. We did not think that there was
an overspeed, but the wreck, including the engine, was sold at auction, so I
don't know for sure.
Two practicing A+E's, one of whom was in the airplane when it happened, felt that
the engine probably did not sustain any damage, but the buyer got it cheap
enough to afford a rebuild so hopefully he did it.
--------
Jim Feldmann
Kitfox IV Speedster / 912 lost to prop failure
Looking for a project
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=375211#375211
Message 10
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| Subject: | Re: Jim Feldmann Prop Failure |
Barry:
I read the SB. The gap between the front and rear halves of the hub was within
spec, but I was not the original owner, so according to the SB I should have
sent it to GSC for inspection. I did not. That is the specific reason why I
did not sue GSC.
--------
Jim Feldmann
Kitfox IV Speedster / 912 lost to prop failure
Looking for a project
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=375212#375212
Message 11
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| Subject: | Re: Jim Feldmann Prop Failure |
thanks for the info so I can add that to the list of props I wont buy ever
again so I dont get another bad prop
Ellery Batchelder Jr.
-----Original Message-----
From: Jim Feldmann <feldesign@earthlink.net>
Sent: Sun, Jun 10, 2012 12:00 pm
Subject: RotaxEngines-List: Re: Jim Feldmann Prop Failure
k.net>
Regarding your question about my prop failure; it was a 2 year old GSC 3 bl
ade.
ll three blades departed the hub at the same time while cruising at about 2
600
eet.
The NYSB studied the remains (all three blades were found within 30 feet of
each
ther on the ground) and could find no apparent cause.
My Kitfox was heavily damaged in the off field landing, but there were no
njuriies.
--------
im Feldmann
itfox IV Speedster / 912 lost to prop failure
ooking for a project
ead this topic online here:
http://forums.matronics.com/viewtopic.php?p=375201#375201
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