Matronics Email Lists :: View topic - Brake line exit holes

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Brake line exit holes

Matronics Email Lists Forum Index -> RV10-List

View previous topic :: View next topic

Author Message

Phil.Perry(at)netapp.com
Guest

Posted: Sat Sep 19, 2009 7:41 am Post subject: Brake line exit holes

I think I really screwed up this morning.  

   

28-5 Step 4  

   

"Enlarge the two pre-punched brake line pilot holes to 5/8 diameter"  

   

These are the holes where the brake lines exit the bottom skin at each landing gear mount.  

   

I drilled the hole in the skins out to 5/8" just as the plans indicated.  While I was there (keep in mind this is a QB), I decided to install the brake line hardware too as described on 36-2.  The AN fitting doesn’t fit through the corresponding hole on the landing gear mount.  

   

After looking at the directions, it says (a second time) to enlarge the hole to 5/8”.   I can only assume they’re talking about the corresponding hole in the landing gear, to make room for the AN fitting.  

   

So now I have a 5/8” hole in the bottom skin and in the landing gear mount.   

   

This is the point where shock set in.  I’ll bet I wasn’t supposed to drill the landing gear mount to 5/8” and I’ll bet the fitting is supposed to mount to the landing gear – and pass through the skin untouched.  

   

Now I have a really nice hole that my AN fitting will push right through.    Not to mention a weak point near a very critical structural component that gets abused (the landing gear).  

   

I think I just bought myself a lot of work, a new right main gear mount, and a lot of stress.  

   

Someone tell me I didn’t….  

   

Phil  

   

   

      [quote][b]

- The Matronics RV10-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?RV10-List

Lenny Iszak

Joined: 23 Mar 2008
Posts: 270

Posted: Sat Sep 19, 2009 8:19 am Post subject: Re: Brake line exit holes

Phil,



Took a (crappy) picture of my brake line exit. The fitting mounts to the landing gear bracket and just goes through the skin.



Hopefully someone has a good idea for a fix. It ain't fun to take the landing gear bracket out.



Lenny

- The Matronics RV10-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?RV10-List

brake_exit.jpg

Description:

Filesize:

68.8 KB

Viewed:

3985 Time(s)

AirMike

Joined: 27 Feb 2007
Posts: 514
Location: Nevada

Posted: Sat Sep 19, 2009 9:39 am Post subject: Brake line exit holes - collapsed gear - and silver linings

Since none of us have a perfect plane, I would not get too concerned. If it were me, I would take a thick aluminum plate - put the proper sized hole in the plate for the AN fitting - then epoxy the plate in place. 



At this point in the build - this kind of error will drive you crazy - a year from now it will be long forgotten. 



Also look at the silver lining to this screw up - you will be much more motivated to make nice soft landings after you are flying.......

- The Matronics RV10-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?RV10-List

_________________
See you OSH '18
Q/B - sold.

kearney

Joined: 20 Sep 2008
Posts: 563

Posted: Sat Sep 19, 2009 10:49 am Post subject: Brake line exit holes

Hi  

   

If you have enlarged a hole in the gear mount, you can avoid having to get a new one by getting a welding shop to fill in the hole. You can then redrill to the correct size.  

   

Cheers  

   

Les   

#40643 –living in f/g hell  

         

  

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Perry, Phil

 Sent: September-19-09 9:27 AM

 To: rv10-list(at)matronics.com

 Subject: Brake line exit holes  

  

   

I think I really screwed up this morning.  

   

28-5 Step 4  

   

"Enlarge the two pre-punched brake line pilot holes to 5/8 diameter"  

   

These are the holes where the brake lines exit the bottom skin at each landing gear mount.  

   

I drilled the hole in the skins out to 5/8" just as the plans indicated.  While I was there (keep in mind this is a QB), I decided to install the brake line hardware too as described on 36-2.  The AN fitting doesn’t fit through the corresponding hole on the landing gear mount.  

   

After looking at the directions, it says (a second time) to enlarge the hole to 5/8”.   I can only assume they’re talking about the corresponding hole in the landing gear, to make room for the AN fitting.  

   

So now I have a 5/8” hole in the bottom skin and in the landing gear mount.   

   

This is the point where shock set in.  I’ll bet I wasn’t supposed to drill the landing gear mount to 5/8” and I’ll bet the fitting is supposed to mount to the landing gear – and pass through the skin untouched.  

   

Now I have a really nice hole that my AN fitting will push right through.    Not to mention a weak point near a very critical structural component that gets abused (the landing gear).  

   

I think I just bought myself a lot of work, a new right main gear mount, and a lot of stress.  

   

Someone tell me I didn’t….  

   

Phil  

   

    	  Quote: 	
		    [b]http://www.matronics.com/Navigator?RV10-List[b] 	
0 	  Quote: 	
		   	
1 	  Quote: 	
		   	
2 	  Quote: 	
		   	
3 	  Quote: 	
		   	
4 	  Quote: 	
		   	
5 	  Quote: 	
		   	
6 	  Quote: 	
		   	
7 	  Quote: 	
		   	
8 	  Quote: 	
		   	
9

       [quote][b]

- The Matronics RV10-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?RV10-List

Phil.Perry(at)netapp.com
Guest

Posted: Sat Sep 19, 2009 11:18 am Post subject: Brake line exit holes

Sorry about going dark for a few hours. I realize a few of you replied. 

The internet connection went down as soon as I sent the first message and it still hasn't returned. 



But my blackberry is working at least.   Once the connection comes back, I'll sort through the replies. 



Phil

 

  From: Perry, Phil 

To: rv10-list(at)matronics.com <rv10-list(at)matronics.com> 

Sent: Sat Sep 19 08:13:10 2009

Subject: Brake line exit holes 

     

I think I really screwed up this morning.  

   

28-5 Step 4  

   

"Enlarge the two pre-punched brake line pilot holes to 5/8 diameter"  

   

These are the holes where the brake lines exit the bottom skin at each landing gear mount.  

   

I drilled the hole in the skins out to 5/8" just as the plans indicated.  While I was there (keep in mind this is a QB), I decided to install the brake line hardware too as described on 36-2.  The AN fitting doesn’t fit through the corresponding hole on the landing gear mount.  

   

After looking at the directions, it says (a second time) to enlarge the hole to 5/8”.   I can only assume they’re talking about the corresponding hole in the landing gear, to make room for the AN fitting.  

   

So now I have a 5/8” hole in the bottom skin and in the landing gear mount.   

   

This is the point where shock set in.  I’ll bet I wasn’t supposed to drill the landing gear mount to 5/8” and I’ll bet the fitting is supposed to mount to the landing gear – and pass through the skin untouched.  

   

Now I have a really nice hole that my AN fitting will push right through.    Not to mention a weak point near a very critical structural component that gets abused (the landing gear).  

   

I think I just bought myself a lot of work, a new right main gear mount, and a lot of stress.  

   

Someone tell me I didn’t….  

   

Phil

- The Matronics RV10-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?RV10-List

Phil White

Joined: 10 Jan 2006
Posts: 45
Location: Downers Grove, IL

Posted: Sun Sep 20, 2009 1:19 pm Post subject: Re: Brake line exit holes

Phil:   We Phil's can hang together, as we make the same mistakes.  Look at the photo attached, which shows how I put a small piece of .035 or .041 with the correct smaller hole in it, on top of the gear leg flange, put the fitting thru, and 'twas fixed.  the slightly oversize hole in that flange won't cause a problem. 

    Can't recall whether there is a washer on the underside or not, but the fitting is solidly attached to the plane now.



Phil White

#40220

- The Matronics RV10-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?RV10-List

Brake line hole patch-sml.jpg

Description:

Filesize:

236.17 KB

Viewed:

3942 Time(s)

Phil.Perry(at)netapp.com
Guest

Posted: Mon Sep 21, 2009 6:47 am Post subject: Brake line exit holes

I don't have my documentation with me this morning and I can't seem to

find Section 4 on Tim's site.



Does anyone know if the main gear mounts are 4130?  I think I've found

an aircraft welder who can patch the hole for me, but I'd like to be

certain of the material first.



Thanks,

Phil





--

- The Matronics RV10-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?RV10-List

Phil.Perry(at)netapp.com
Guest

Posted: Mon Sep 21, 2009 9:11 am Post subject: Brake line exit holes

Got the answer for those who are wondering.  (Or for those who might

search the archives later.)



1) Yes, it is 4130.



2) Unfortunately the mount has been heat treated.  So touching the thing

with a welder is not a good idea for fear of weakening the structure.



3) Van's doesn't believe there is a structural issue with the hole, but

they're running it by engineering to check.



4) The proposed solution from Van's is to insert a bushing into the hole

and then a large flat washer on top to hold it into position.



Once we reach a resolution, I'll send the fix for the archives.



Phil



--

- The Matronics RV10-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?RV10-List

Display posts from previous:

	Matronics Email Lists Forum Index -> RV10-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum