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Out rigger latching postmortem

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paul.the.aviator(at)gmail
Guest

Posted: Sun Oct 07, 2007 12:49 pm Post subject: Out rigger latching postmortem

Hi all,



As some of you may recall I had an incident where my port out rigger

didn't latch. I did some work on it this weekend and discovered that

the head of a castellated nut had been catching the side of the W21

outrigger plate.



If you look at the drawing on the bottom left hand corner on page 9-23

of the manual you will see that a AN4-11 drilled bolt passes through

the top of the outrigger leg OR1 attaching it to OR4.  The AN4-11 bolt

is fitted with a AN310 castellated nut.



What happening was that there was enough play where the bolt goes

through the OR4 latch arm to allow OR1 to twist sideways so that the

nut catches on the side of the W21 outrigger plate.



What I did was to shorten the AN4-11 drilled bolt by 2mm and use a low

profile castellated nut, I believe that they are designated AN320 (not

certain).  In addition I fitted another AN960-416L washer in the slot

of OR1 to take up the slack between it and the OR4 latch.



All seems well now, but I would encourage everyone to take a look on

the inside of there W21 outrigger plate to check for signs of

catching.



I intend to fit a micro switch to detect gear down and locked, but I

am afraid to say the the ultimate solution will be to convert my

aircraft into a conventional tail dragger.  Another instance of the

outrigger not locking or the main gear over center lock failing is

more than I would want to contemplate at some remote airstrip.



Regards,  Paul

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fklein(at)orcasonline.com
Guest

Posted: Sun Oct 07, 2007 2:39 pm Post subject: Out rigger latching postmortem

Paul McAllister wrote:



 	  Quote: 	
		   In addition I fitted another AN960-416L washer in the slot

 of OR1 to take up the slack between it and the OR4 latch.


	


Paul/All,



I've noticed that my hard copy build manual calls for a total of 2 

AN960-416L washers in the OR1 slot, whereas the latest online manual 

has ADDED a 3rd washer. Checking my installation, there appears to be 

sufficient slack to add that 3rd washer.



Thanks Paul for bringing this to our attention.



Fred

-- 

This message has been scanned for viruses and

dangerous content by MailScanner, and is

believed to be clean.

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gcsmith(at)flyer.co.uk
Guest

Posted: Mon Oct 08, 2007 5:05 am Post subject: Out rigger latching postmortem

Paul,

  

 Having suffered an overcentre locking failure, I can agree with your sentiments. I agree that a taildragger configuration would be a great improvement, do you have a suitable design/approved mod? I heard that the PFA were not approving any more of the 'Swiss' modification until feedback from the ones that have already been implemented. Do you have any others in mind? 

  

 Regards,

 Graeme Smith



 

 On 07/10/2007, Paul McAllister <paul.the.aviator(at)gmail.com (paul.the.aviator(at)gmail.com)> wrote: [quote]--> Europa-List message posted by: "Paul McAllister" < paul.the.aviator(at)gmail.com (paul.the.aviator(at)gmail.com)>



Hi all,



As some of you may recall I had an incident where my port out rigger

didn't latch. I did some work on it this weekend and discovered that

the head of a castellated nut had been catching the side of the W21 

outrigger plate.



If you look at the drawing on the bottom left hand corner on page 9-23

of the manual you will see that a AN4-11 drilled bolt passes through

the top of the outrigger leg OR1 attaching it to OR4.  The AN4-11 bolt 

is fitted with a AN310 castellated nut.



What happening was that there was enough play where the bolt goes

through the OR4 latch arm to allow OR1 to twist sideways so that the

nut catches on the side of the W21 outrigger plate. 



What I did was to shorten the AN4-11 drilled bolt by 2mm and use a low

profile castellated nut, I believe that they are designated AN320 (not

certain).  In addition I fitted another AN960-416L washer in the slot 

of OR1 to take up the slack between it and the OR4 latch.



All seems well now, but I would encourage everyone to take a look on

the inside of there W21 outrigger plate to check for signs of

catching.



 I intend to fit a micro switch to detect gear down and locked, but I

am afraid to say the the ultimate solution will be to convert my

aircraft into a conventional tail dragger.  Another instance of the

outrigger not locking or the main gear over center lock failing is 

dangerous content by MailScanner, and is

believed to be clean.

[b]

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grahamsingleton(at)btinte
Guest

Posted: Mon Oct 08, 2007 9:49 am Post subject: Out rigger latching postmortem

Graeme

you might talk to Miles McCallum?

Graham



Graeme Smith wrote:

 	  Quote: 	
		   Paul,

  

 Having suffered an overcentre locking failure, I can agree with your 

 sentiments. I agree that a taildragger configuration would be a great 

 improvement, do you have a suitable design/approved mod? I heard that 

 the PFA were not approving any more of the 'Swiss' modification until 

 feedback from the ones that have already been implemented. Do you have 

 any others in mind?

  

 Regards,

 Graeme Smith

 

  

 On 07/10/2007, *Paul McAllister* <paul.the.aviator(at)gmail.com 

 <mailto:paul.the.aviator(at)gmail.com>> wrote:

 

     

     paul.the.aviator(at)gmail.com <mailto:paul.the.aviator(at)gmail.com>>

 

     Hi all,

 

     As some of you may recall I had an incident where my port out rigger

     didn't latch. I did some work on it this weekend and discovered that

     the head of a castellated nut had been catching the side of the W21

     outrigger plate.

 

     If you look at the drawing on the bottom left hand corner on page 9-23

     of the manual you will see that a AN4-11 drilled bolt passes through

     the top of the outrigger leg OR1 attaching it to OR4.  The AN4-11 bolt

     is fitted with a AN310 castellated nut.

 

     What happening was that there was enough play where the bolt goes

     through the OR4 latch arm to allow OR1 to twist sideways so that the

     nut catches on the side of the W21 outrigger plate.

 

     What I did was to shorten the AN4-11 drilled bolt by 2mm and use a low

     profile castellated nut, I believe that they are designated AN320 (not

     certain).  In addition I fitted another AN960-416L washer in the slot

     of OR1 to take up the slack between it and the OR4 latch.

 

     All seems well now, but I would encourage everyone to take a look on

     the inside of there W21 outrigger plate to check for signs of

     catching.

 

     I intend to fit a micro switch to detect gear down and locked, but I

     am afraid to say the the ultimate solution will be to convert my

     aircraft into a conventional tail dragger.  Another instance of the

     outrigger not locking or the main gear over center lock failing is

     dangerous content by MailScanner, and is

     believed to be clean.

 

 

 

 *

 

 

 *


	


-- 

Graham Singleton



Tel: +441629820187

Mob: +447739582005

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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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fklein(at)orcasonline.com
Guest

Posted: Mon Oct 08, 2007 10:40 am Post subject: Out rigger latching postmortem

On Monday, October 8, 2007, at 06:04  AM, Graeme Smith wrote:



 	  Quote: 	
		    I agree that a taildragger configuration would be a great 

 improvement, do you have a suitable design/approved mod? I heard that 

 the PFA were not approving any more of the 'Swiss' modification until 

 feedback from the ones that have already been implemented. Do you have 

 any others in mind?


	


Graeme,



You might check w/ Bob Berube at FlightCrafters.com...



Fred

-- 

This message has been scanned for viruses and

dangerous content by MailScanner, and is

believed to be clean.

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Europa-List

paul.the.aviator(at)gmail
Guest

Posted: Mon Oct 08, 2007 2:09 pm Post subject: Out rigger latching postmortem

Graeme,



I intend to use the modification designed by Bob Berbue.  I can

forward you on some photographs if that will help.



Paul



On 10/8/07, Graeme Smith <gcsmith(at)flyer.co.uk> wrote:

 	  Quote: 	
		   Paul,



 Having suffered an overcentre locking failure, I can agree with your

 sentiments. I agree that a taildragger configuration would be a great

 improvement, do you have a suitable design/approved mod? I heard that the

 PFA were not approving any more of the 'Swiss' modification until feedback

 from the ones that have already been implemented. Do you have any others in

 mind?



 Regards,

 Graeme Smith

 On 07/10/2007, Paul McAllister <paul.the.aviator(at)gmail.com> wrote:

 > 

 paul.the.aviator(at)gmail.com>

 >

 > Hi all,

 >

 > As some of you may recall I had an incident where my port out rigger

 > didn't latch. I did some work on it this weekend and discovered that

 > the head of a castellated nut had been catching the side of the W21

 > outrigger plate.

 >

 > If you look at the drawing on the bottom left hand corner on page 9-23

 > of the manual you will see that a AN4-11 drilled bolt passes through

 > the top of the outrigger leg OR1 attaching it to OR4.  The AN4-11 bolt

 > is fitted with a AN310 castellated nut.

 >

 > What happening was that there was enough play where the bolt goes

 > through the OR4 latch arm to allow OR1 to twist sideways so that the

 > nut catches on the side of the W21 outrigger plate.

 >

 > What I did was to shorten the AN4-11 drilled bolt by 2mm and use a low

 > profile castellated nut, I believe that they are designated AN320 (not

 > certain).  In addition I fitted another AN960-416L washer in the slot

 > of OR1 to take up the slack between it and the OR4 latch.

 >

 > All seems well now, but I would encourage everyone to take a look on

 > the inside of there W21 outrigger plate to check for signs of

 > catching.

 >

 > I intend to fit a micro switch to detect gear down and locked, but I

 > am afraid to say the the ultimate solution will be to convert my

 > aircraft into a conventional tail dragger.  Another instance of the

 > outrigger not locking or the main gear over center lock failing is

 > dangerous content by MailScanner, and is

 > believed to be clean.

 >

 >

 >

- The Matronics Europa-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

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