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New issue, turtle deck security
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WurlyBird



Joined: 16 May 2008
Posts: 207
Location: North Pole, Alaska

PostPosted: Sun Feb 15, 2009 9:37 am    Post subject: New issue, turtle deck security Reply with quote

I can not tell you how much I hate being the guy who has one issue after another, but I have to say I expected to have a series of issues purchasing a plane. I just didn't think they would all be so EXCITING.

So yesterday I had my instructor take my wife up in the Kitfox for a quick ride since she is half the owner and had never been up in it. When they came back the turtle deck had popped out from under the green house (is this what the large sun roof window is called in this plane?) and was acting as a large scoop. What I have been told was that they were doing some progressively steeper turns and on a right turn the instructor let the nose tuck in the turn which let the airspeed build a little, probably around 90-95 indicated, and then there was a "pop" and a "woosh". Shocked Neither said where the trim ball was at the time, but I am sure it was not in the center.

We pulled the turtle deck off and reinstalled it and the front edge of it buts all the way against the metal strip which holds the gap under the window. All DZUS fasteners (camlocks?) were installed and are as snug as I would expect. So once again I am here with no ideas how to go about fixing this, or even if there is something to fix. I am not sure what could have caused this to happen. Any help is appreciated.

James


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James
Kitfox 3 / 582 / 70" IVO 2 blade GA
50 hrs on the 582 swapping for HKS 700E and Avid Cowl.
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akflyer



Joined: 07 May 2007
Posts: 574
Location: Soldotna AK

PostPosted: Sun Feb 15, 2009 9:57 am    Post subject: Re: New issue, turtle deck security Reply with quote

James, I read in my Avid manual of this happening if the windshield was cut to short and the turtle deck did not stuck under it far enough. I thing they recommended 1.25" of turtle deck sticking under the windshield. The fix was to drill out the rivets on the back edge of the windshield, slip a piece of aluminum between the windshield and the spacer to get the full 1.25" over lap. Would only take an hour tops to make the quick fix! I will dig through the files and see if I can find the drawing for you and get it posted in the next couple hours.

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DO NOT ARCHIVE
Leonard Perry aka SNAKE
Soldotna AK
Avid "C" / Mk IV
582 (147 hrs and counting on the rebuild)
IVO IFA
Full Lotus 1450
#1 snake oil salesman since 1-22-2009

I would rather die trying to live, than to live trying not to die....
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akflyer



Joined: 07 May 2007
Posts: 574
Location: Soldotna AK

PostPosted: Sun Feb 15, 2009 10:12 am    Post subject: Re: New issue, turtle deck security Reply with quote

here is some snake oil for today...... the service letter from Avid. This will take care of you!

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Turtle deck service letter.pdf
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DO NOT ARCHIVE
Leonard Perry aka SNAKE
Soldotna AK
Avid "C" / Mk IV
582 (147 hrs and counting on the rebuild)
IVO IFA
Full Lotus 1450
#1 snake oil salesman since 1-22-2009

I would rather die trying to live, than to live trying not to die....
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WurlyBird



Joined: 16 May 2008
Posts: 207
Location: North Pole, Alaska

PostPosted: Sun Feb 15, 2009 10:44 am    Post subject: Re: New issue, turtle deck security Reply with quote

Thanks a bunch. I read the letter and checked my measurements. I am sitting at 1 1/2" so I am good according to the letter. But I find it odd that they are measuring from the front edge of FC-3. Why not state the minimum requirement as amount of over hang? I have 5/8" of lexan that over laps the turtle deck, does this sound like the appropriate amount?

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James
Kitfox 3 / 582 / 70" IVO 2 blade GA
50 hrs on the 582 swapping for HKS 700E and Avid Cowl.
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akflyer



Joined: 07 May 2007
Posts: 574
Location: Soldotna AK

PostPosted: Sun Feb 15, 2009 11:11 am    Post subject: Re: New issue, turtle deck security Reply with quote

NO, they state you need 1.25" overlap. The drawing is a little hosed up, read the written description. The letter kinda states why... it you dont have the overlap, and you are doing slips (could be an uncoordinated turn) you can pressure up the fuse and blammo you got a nice little speed brake right behind your head and soiled pair of shorts. Not so bad if they are yours, but if you make the ole lady soil hers, you can expect some couch time in the near future and the playground is liable to be off limits for a very long time.

Do the fix they show and you will both be happier.


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DO NOT ARCHIVE
Leonard Perry aka SNAKE
Soldotna AK
Avid "C" / Mk IV
582 (147 hrs and counting on the rebuild)
IVO IFA
Full Lotus 1450
#1 snake oil salesman since 1-22-2009

I would rather die trying to live, than to live trying not to die....
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WurlyBird



Joined: 16 May 2008
Posts: 207
Location: North Pole, Alaska

PostPosted: Sun Feb 15, 2009 11:58 am    Post subject: Re: New issue, turtle deck security Reply with quote

I re-read it two more times, everything is indicating that the minimum required 1 1/4" is measured from the front of FC-3. Do you have 1 1/4" of lexan that overlaps the turtle deck? Can I get a quick poll on this from a few people? I can certainly see that the extra would help keep everything together.

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Kitfox 3 / 582 / 70" IVO 2 blade GA
50 hrs on the 582 swapping for HKS 700E and Avid Cowl.
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PostPosted: Sun Feb 15, 2009 12:30 pm    Post subject: New issue, turtle deck security Reply with quote

James. Looking at Lenoards drawing C " frrom the front of FC-3 overlap" would not give you 1 1/4 overlap of the turtle deck. It would give you 1 1/4" minus the width of FC-28. Leonards drawing shows that dimention to be 5/8".

Pat Reilly
Mod 3 582 Rebuild
Rockford C IL


Quote:
Subject: Re: New issue C turtle deck security
From: james.t.trizzino(at)us.army.mil
Date: Sun C 15 Feb 2009 11:58:42 -0800
To: kitfox-list(at)matronics.com

--> Kitfox-List message posted by: "WurlyBird" <james.t.trizzino(at)us.army.mil>

I re-read it two more times C everything is indicating that the minimum required 1 1/4" is measured from the front of FC-3. Do you have 1 1/4" of lexan that overlaps the turtle deck? Can I get a quick poll on this from a few people? I can certainly see that the extra would help keep everything together.

--------
James
Kitfox 3 / 582 / GSC prop
4 hrs of instruction and climbing (I solo tomorrow)




Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=230377#230377




Attachments:

http://forums.matronics.com//files/avid_clip_189.jpg
&gt=======================

[quote]


Quote:
[b]


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akflyer



Joined: 07 May 2007
Posts: 574
Location: Soldotna AK

PostPosted: Sun Feb 15, 2009 1:13 pm    Post subject: Re: New issue, turtle deck security Reply with quote

WurlyBird wrote:
I re-read it two more times, everything is indicating that the minimum required 1 1/4" is measured from the front of FC-3. Do you have 1 1/4" of lexan that overlaps the turtle deck? Can I get a quick poll on this from a few people? I can certainly see that the extra would help keep everything together.


OK as I said the DRAWING is hosed... use it a REFERENCE to give you a visual on the fix... the written description states


The leading edge of the turtle deck must engage the skylight with a minimum overlap of 1 1/4"


This does not say from the edge of yada yada, it states OVERLAP period. Go by the written letter not the drawing and you cant go wrong.

I put this on mine as I did not feel like having an in-flight air-conditioning system self activating at inopportune moments.
[/b]


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_________________
DO NOT ARCHIVE
Leonard Perry aka SNAKE
Soldotna AK
Avid "C" / Mk IV
582 (147 hrs and counting on the rebuild)
IVO IFA
Full Lotus 1450
#1 snake oil salesman since 1-22-2009

I would rather die trying to live, than to live trying not to die....
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akflyer



Joined: 07 May 2007
Posts: 574
Location: Soldotna AK

PostPosted: Sun Feb 15, 2009 2:38 pm    Post subject: Re: New issue, turtle deck security Reply with quote

marked up the PDF and reposted
EDIT* pdf did not attach


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Turtle deck marked up.pdf
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_________________
DO NOT ARCHIVE
Leonard Perry aka SNAKE
Soldotna AK
Avid "C" / Mk IV
582 (147 hrs and counting on the rebuild)
IVO IFA
Full Lotus 1450
#1 snake oil salesman since 1-22-2009

I would rather die trying to live, than to live trying not to die....
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Lynn Matteson



Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan

PostPosted: Sun Feb 15, 2009 3:03 pm    Post subject: New issue, turtle deck security Reply with quote

This is an unfortunate circumstance where the "picture guy" and the
"dialogue guy" did not get on the same page...literally....before
this Service Bulletin went out.
It's too bad too, because it leaves us builders to try to figure out
if the situation calls for the 1 -1/4" overlap of turledeck and
skylight, or the "apparent" 5/8" of overlap as shown on the drawing.
What do we follow...words or picture?

Just to interject my own situation, I followed the *Kitfox* drawing
and dialogue, and mine came out closer to the 5/8" dimension. I have
not had the trouble that James has had and I do a LOT of slips to
both sides.

Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062, 605 hrs
Sensenich 62x46
Electroair direct-fire ignition system
New skis done and flying


On Feb 15, 2009, at 2:58 PM, WurlyBird wrote:

Quote:

<james.t.trizzino(at)us.army.mil>

I re-read it two more times, everything is indicating that the
minimum required 1 1/4" is measured from the front of FC-3. Do you
have 1 1/4" of lexan that overlaps the turtle deck? Can I get a
quick poll on this from a few people? I can certainly see that the
extra would help keep everything together.

--------
James
Kitfox 3 / 582 / GSC prop
4 hrs of instruction and climbing (I solo tomorrow)


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p 30377#230377


Attachments:

http://forums.matronics.com//files/avid_clip_189.jpg



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Kitfox IV-Jabiru 2200
N369LM
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Paul A. Franz, P.E.



Joined: 02 Dec 2008
Posts: 280
Location: Bellevue WA

PostPosted: Sun Feb 15, 2009 4:05 pm    Post subject: New issue, turtle deck security Reply with quote

On Sun, February 15, 2009 2:38 pm, akflyer wrote:
Quote:


marked up the PDF and reposted

Excellent! Now this is perfectly clear. However, I must point out that the markup did
not get distributed to the e-mail list but it appears in the forum posting just fine.
click this link to see Leni's (Snakeman's) perfectly clear markup.

<http://forums.matronics.com/download.php?id=14596&sid=7a9dbd247008ae785633dd9eb88241c2>

Quote:

--------
DO NOT ARCHIVE
Leonard Perry aka SNAKE
Soldotna AK
Avid &quot;C&quot; / Mk IV
582 IVO IFA
Full Lotus 1260
#1 snake oil salesman since 1-22-2009

hander outer of humorless darwin awards


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p 30404#230404




--
Paul Franz
425.440.9505 (O)
425.241.1618 (C)


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Paul A. Franz, P.E.
Registration/Aircraft - N14UW/Merlin GT
Engine/Prop - Rotax 914/NSI CAP
Bellevue WA
425.241.1618 Cell
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akflyer



Joined: 07 May 2007
Posts: 574
Location: Soldotna AK

PostPosted: Sun Feb 15, 2009 5:12 pm    Post subject: Re: New issue, turtle deck security Reply with quote

Paul A. Franz, P.E. wrote:
On Sun, February 15, 2009 2:38 pm, akflyer wrote:
Quote:


marked up the PDF and reposted


Excellent! Now this is perfectly clear. However, I must point out that the markup did
not get distributed to the e-mail list but it appears in the forum posting just fine.
click this link to see Leni's (Snakeman's) perfectly clear markup.

<http>

Quote:

--------
DO NOT ARCHIVE
Leonard Perry aka SNAKE
Soldotna AK
Avid &quot;C&quot; / Mk IV
582 IVO IFA
Full Lotus 1260
#1 snake oil salesman since 1-22-2009

hander outer of humorless darwin awards


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p 30404#230404


--
Paul Franz
425.440.9505 (O)
425.241.1618 (C)

Paul, I think it is because the PDF did not attach right when I first made the post. I edited the post and now it shows up on the forum, but not to anyone who is just using emails. For the sake of all, I will post the attachment again with this reply.


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Turtle deck marked up.pdf
 Description:

Download
 Filename:  Turtle deck marked up.pdf
 Filesize:  115.52 KB
 Downloaded:  466 Time(s)


_________________
DO NOT ARCHIVE
Leonard Perry aka SNAKE
Soldotna AK
Avid "C" / Mk IV
582 (147 hrs and counting on the rebuild)
IVO IFA
Full Lotus 1450
#1 snake oil salesman since 1-22-2009

I would rather die trying to live, than to live trying not to die....
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patreilly43(at)hotmail.co
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PostPosted: Sun Feb 15, 2009 5:49 pm    Post subject: New issue, turtle deck security Reply with quote

Len C Thanks for info. I made my 2 piece windshield cabin top same as original it has about 5/8 " overlap. Guess I'll have to install the aluminum overhang addition to be safe. Hard to believe 5/8" isn't adequate.
do not archive

Pat Reilly
Mod 3 582 Rebuild
Rockford C IL


Quote:
Date: Sun C 15 Feb 2009 16:04:29 -0800
Subject: Re: Re: New issue C turtle deck security
From: paul(at)eucleides.com
To: kitfox-list(at)matronics.com

--> Kitfox-List message posted by: "Paul Franz" <paul(at)eucleides.com>


On Sun C February 15 C 2009 2:38 pm C akflyer wrote:
> --> Kitfox-List message posted by: "akflyer" <akflyer_2000(at)yahoo.com>
>
> marked up the PDF and reposted

Excellent! Now this is perfectly clear. However C I must point out that the markup did
not get distributed to the e-mail list but it appears in the forum posting just fine.
click this link to see Leni's (Snakeman's) perfectly clear markup.

<http://forums.matronics.com/download.php?id=14596&sid=7a9dbd247008ae785633dd9eb88241c2>

>
> --------
> DO NOT ARCHIVE
> Leonard Perry aka SNAKE
> Soldotna AK
> Avid &quot;C&quot; / Mk IV
> 582 IVO IFA
> Full Lotus 1260
> #1 snake oil salesman since 1-22-2009
>
> hander outer of humorless darwin awards
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=230404#230404
>
>
>
>
>
>
>
>
>
>


--
Paul Franz
425.440.9505 (O)
425.241.=====================
_================




[quote][b]


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Lynn Matteson



Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan

PostPosted: Sun Feb 15, 2009 5:55 pm    Post subject: New issue, turtle deck security Reply with quote

Perfectly clear, but is this 1-1/4" dimension really needed? The
Kitfox seems to work ok with the 5/8" overlap, and this is the first
time we've (I've, at least) heard of the turtledeck blowing out...or
is it? Somebody with more time in type and on this list should be
able to answer this question. Is there a Service Bulletin out on the
Kitfox? Remember this is an Avid Service Bulletin. I'm not saying
anything bad about Avids, just trying to understand why no SB on a
Kitfox, if indeed there are none.

Next is the history of this particular plane. Just the other day we
had a flutter problem on this plane. Now we've got a turtledeck
trying to exit the plane. How about thinking a bit further into this
plane, and wondering if maybe the plane was sold because it exhibited
some of these strange behaviors. How about a weak framework? How
about a broken tube joint somewhere hidden from normal view that
would allow the framework to flex? Did the new owner take the seats
out, and look for any new welds, or broken ones? Are all the camlocks
present and accounted for?...my plane has 9 of them holding the
t'deck on...factory count. Are they tight? How thick is the
windshield/skylight material? How many machine screws hold the rear
of the skylight in place, or are they rivets as the Kitfox and the
Avid drawings show? I chose to use machine screws and nutplates on my
installation after I read of so many builders needing to replace
windshields/skylights due to crazing/cracks, etc. That might account
for some of the strength in that area that my plane apparently exhibits.

Remember this is a recently sold/purchased airplane....maybe the
buyer need to do more than kick the tires and light 'er up.

Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062, 605 hrs
Sensenich 62x46
Electroair direct-fire ignition system
New skis done and flying


On Feb 15, 2009, at 7:04 PM, Paul Franz wrote:

Quote:

On Sun, February 15, 2009 2:38 pm, akflyer wrote:
>
>
> marked up the PDF and reposted

Excellent! Now this is perfectly clear. However, I must point out
that the markup did
not get distributed to the e-mail list but it appears in the forum
posting just fine.
click this link to see Leni's (Snakeman's) perfectly clear markup.

<http://forums.matronics.com/download.php?
id=14596&sid=7a9dbd247008ae785633dd9eb88241c2>

>
> --------
> DO NOT ARCHIVE
> Leonard Perry aka SNAKE
> Soldotna AK
> Avid &quot;C&quot; / Mk IV
> 582 IVO IFA
> Full Lotus 1260
> #1 snake oil salesman since 1-22-2009
>
> hander outer of humorless darwin awards
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p 30404#230404
>
>
--
Paul Franz
425.440.9505 (O)
425.241.1618 (C)




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Kitfox IV-Jabiru 2200
N369LM
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Lynn Matteson



Joined: 10 Jan 2006
Posts: 2778
Location: Grass Lake, Michigan

PostPosted: Sun Feb 15, 2009 6:07 pm    Post subject: New issue, turtle deck security Reply with quote

Hard for me to believe too, Pat, but remember that this is an Avid
Service Letter, *undated*, and refers to slips with the door open.
Maybe this was released before Kitfox broke away from the "parent"
organization, and Kitfox strengthened something after this, rendering
this SL non-applicable to the 'fox.

Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062, 605 hrs
Sensenich 62x46
Electroair direct-fire ignition system
New skis done and flying


On Feb 15, 2009, at 8:47 PM, patrick reilly wrote:

Quote:
Len, Thanks for info. I made my 2 piece windshield cabin top same
as original it has about 5/8 " overlap. Guess I'll have to install
the aluminum overhang addition to be safe. Hard to believe 5/8"
isn't adequate.
do not archive

Pat Reilly
Mod 3 582 Rebuild
Rockford, IL


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Kitfox IV-Jabiru 2200
N369LM
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Tom Jones



Joined: 12 Mar 2006
Posts: 752
Location: Ellensburg, WA

PostPosted: Sun Feb 15, 2009 7:13 pm    Post subject: Re: New issue, turtle deck security Reply with quote

Quote:
We pulled the turtle deck off and reinstalled it and the front edge of it buts all the way against the metal strip which holds the gap under the window. All DZUS fasteners (camlocks?) were installed and are as snug as I would expect. So once again I am here with no ideas how to go about fixing this, or even if there is something to fix. I am not sure what could have caused this to happen. Any help is appreciated.

James


James, I just now went out and looked at my turtle deck. Mine is a Classic 4 and I have never seen a Model III in person. It may be different than a 4. I see no way the leading edge can come out from under the skylight trailing edge without some significant permanent bending.

Attached is a picture of the inside of the leading edge on a Classic 4 turtle deck. Note the notch in the lower left where it fits around the rear spar carry through. Also the stiffening angles riveted to the inside of the deck. The camlock on the side near the leading edge.

The wear marks where it has been fitting shows 5/8 inch overlap under the skylight lexan.

Is it possible your turtle deck was installed with the leading edge on top of the trailing edge of the skylight by mistake before the flight?

I would not hesitate to install the mod posted for the avid if you can't find a logical reason for what happened. It would be good to hear from some model III owners on this.

Edit,:Sorry about the wide picture, can't seem to fix it. Sometimes this forum is a mystery to me.


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Classic IV
503 Rotax, 72 inch Two blade Warp
Ellensburg, WA
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sbennett3(at)aol.com
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PostPosted: Sun Feb 15, 2009 7:39 pm    Post subject: New issue, turtle deck security Reply with quote

On a long cross country with the turtle deck FULL of cargo this happened to me. We landed at a controlled field that night and went home. When I returned the next day I noticed that it was the overloading of the turtledeck that caused this. I agree with the last post that maybe the deck was installed with the trailing edge over the lip. I don't know what else to call it but if it got loud and windy and cold in the cockpit, that's probably what happened. I'm not a builder, but this has happened to me as well... I bought a cargo sack from Kitfox and maybe we wont have to have this conversation again. Steve Bennett Classic 4 1200 912 Durham NC.



In a message dated 02/15/09 22:15:27 Eastern Standard Time, nahsikhs(at)elltel.net writes:
[quote] .aolmailheader {font-size:8pt; color:black; font-family:Arial} a.aolmailheader:link {color:blue; text-decoration:underline; font-weight:normal} a.aolmailheader:visited {color:magenta; text-decoration:underline; font-weight:normal} a.aolmailheader:active {color:blue; text-decoration:underline; font-weight:normal} a.aolmailheader:hover {color:blue; text-decoration:underline; font-weight:normal} --> Kitfox-List message posted by: "Tom Jones" <nahsikhs(at)elltel.net>
Quote:
We pulled the turtle deck off and reinstalled it and the front edge of it buts all the way against the metal strip which holds the gap under the window. All DZUS fasteners (camlocks?) were installed and are as snug as I would expect. So once again I am here with no ideas how to go about fixing this, or even if there is something to fix. I am not sure what could have caused this to happen. Any help is appreciated.

James


James, I just now went out and looked at my turtle deck. Mine is a Classic 4 and I have never seen a Model III in person. It may be different than a 4. I see no way the leading edge can come out from under the skylight trailing edge without some significant permanent bending.

Attached is a picture of the inside of the leading edge on a Classic 4 turtle deck. Note the notch in the lower left where it fits ar <
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vetdrem



Joined: 20 Nov 2007
Posts: 62

PostPosted: Sun Feb 15, 2009 8:05 pm    Post subject: Re: New issue, turtle deck security Reply with quote

My model 3 only has about 3/8"overlap. I have not had any problems with mine. I just tried to push it out by hand, to see if i could cause it to come out, but even applying more force than I was comfortable doing, I could not get it to pop out..

Louie
Model 3 912ul


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Paul A. Franz, P.E.



Joined: 02 Dec 2008
Posts: 280
Location: Bellevue WA

PostPosted: Sun Feb 15, 2009 8:11 pm    Post subject: New issue, turtle deck security Reply with quote

On Sun, February 15, 2009 7:13 pm, Tom Jones wrote:
Quote:


Quote:
Attached is a picture of the inside of the leading edge on a Classic 4 turtle deck.
Note the notch in the lower left where it fits around the rear spar carry through.
Also the stiffening angles riveted to the inside of the deck. The camlock on the side
near the leading edge.

The attachment is actaully here:

<http://forums.matronics.com/files/turtle_deck_132.jpg>

Rather than the improperly shown link in the e-mail distributed to the KF List:

Quote:
Attachments:

http://forums.matronics.com//files/turtle_deck_603.jpg

Something goofy happens when a forum post with a picture gets sent to e-mail. Notice
the extra forward slash in the posted link? Just enough so that the matronics web
server can't resolve the file location.

--
Paul A. Franz
Registration/Aircraft - N14UW/Merlin GT
Engine/Prop - Rotax 914/NSI CAP
Bellevue WA
425.241.1618 Cell


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_________________
Paul A. Franz, P.E.
Registration/Aircraft - N14UW/Merlin GT
Engine/Prop - Rotax 914/NSI CAP
Bellevue WA
425.241.1618 Cell
425.440.9505 Office
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Fox5flyer
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PostPosted: Mon Feb 16, 2009 3:59 am    Post subject: New issue, turtle deck security Reply with quote

Good post, Lynn. All very good points. I had a good look at mine, a S5 and
same setup as the 3. As far as I can see there is only one thing that can
cause that leading edge to come out and that is extreme bending of the
complete turtle deck itself. That is what the long stiffeners are for and
after fooling around with mine for a few minutes, I found that it just ain't
gonna happen. Before we all start tearing things apart and reinventing the
wheel, lets first ensure there is a real inherent problem and not an
isolated incident that is based on the method of fabrication.
Personally, I feel everyone should have a good look at theirs, but I don't
think it's an issue.
Deke Morisse
Mikado Michigan
S5/Subaru/CAP 402+ TT
"The aim of an argument or discussion should not be victory, but progress."
- Joseph Joubert
---


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