VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

  #1  
Old 08-17-2018, 12:33 PM
dwranda dwranda is offline
 
Join Date: Jan 2015
Location: Jamestown,NY
Posts: 372
Default Canopy frame groin punch!!

Well I was ready to rivet the skin to my canopy frame today to get ready to glue the canopy to it next week. I had noticed the fit on the right side had changed a little, but I thought it had to do with the 3 strengthening pieces between the frame and skin. I put the blank panel in for the first time with the canopy frame installed and there was a huge gap near the middle on the right. I discovered the tube on the frame had cracked. Talk about a punch in the groin!! I have an email in to Vans to see if it's something that could be welded or if I have to replace it and start over. UGH!! This was also the first time I realized that that tube and the huge gap between it and the skin on the outer edges are visible from inside the plane. Now I know why guys use fillers to fill in that gap to make it look nicer. For some reason I thought that tube was behind the panel when the canopy closed.
[IMG][/IMG]
__________________
9A in progress
Working on Finish kit!!
Mattituck TMXIO-360 red gold
Dues paid Dec 17
Reply With Quote
  #2  
Old 08-17-2018, 01:46 PM
bruceh's Avatar
bruceh bruceh is offline
 
Join Date: Mar 2008
Location: Ramona, CA
Posts: 2,094
Default

Looks like the countersink on that one was oversized and might have weakened the tubing.
__________________
Bruce Hill
RV-9A N5771H flown over 600 hours!
http://www.overthehills.com/RV-9A-Project
APRS Tracking for KJ6YRP and New Flying Blog
2018 VAF donator
EAA Tech Counselor
Reply With Quote
  #3  
Old 08-17-2018, 02:05 PM
dwranda dwranda is offline
 
Join Date: Jan 2015
Location: Jamestown,NY
Posts: 372
Default

Quote:
Originally Posted by bruceh View Post
Looks like the countersink on that one was oversized and might have weakened the tubing.
Yes that is a possibility!
__________________
9A in progress
Working on Finish kit!!
Mattituck TMXIO-360 red gold
Dues paid Dec 17
Reply With Quote
  #4  
Old 08-17-2018, 03:17 PM
BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
Posts: 4,520
Default It can be welded.

I made a "u" shaped die to hold the tube and used a dimple die in avery hand squeezer to make dimples, then refined with a countersink.

I did some welding on this piece, but not the tube, it will take some skill.
__________________
Bill

RV-7
1st Flight 1-27-18
Phase II 8-3-18
Reply With Quote
  #5  
Old 08-17-2018, 07:22 PM
bluskydreamin bluskydreamin is offline
 
Join Date: Oct 2015
Location: midwest
Posts: 56
Default dont sweat it!

I broke this tube in half trying to "adjust" the tip up frame to the rest of the fuselage on a -7 build. Took it to a local machine shop that did TIG welding. I dropped it off on my way to morning coffee and $30 - 30 minutes later.... it was like new. Press on! The canopy of the pre -14 era can be a source of endless patience testing fun....

Quote:
Originally Posted by dwranda View Post
Well I was ready to rivet the skin to my canopy frame today to get ready to glue the canopy to it next week. I had noticed the fit on the right side had changed a little, but I thought it had to do with the 3 strengthening pieces between the frame and skin. I put the blank panel in for the first time with the canopy frame installed and there was a huge gap near the middle on the right. I discovered the tube on the frame had cracked. Talk about a punch in the groin!! I have an email in to Vans to see if it's something that could be welded or if I have to replace it and start over. UGH!! This was also the first time I realized that that tube and the huge gap between it and the skin on the outer edges are visible from inside the plane. Now I know why guys use fillers to fill in that gap to make it look nicer. For some reason I thought that tube was behind the panel when the canopy closed.
[IMG][/IMG]
Reply With Quote
  #6  
Old 08-21-2018, 09:20 AM
sblack sblack is offline
 
Join Date: Dec 2009
Location: Montreal
Posts: 1,279
Default

Quote:
Originally Posted by bluskydreamin View Post
I broke this tube in half trying to "adjust" the tip up frame to the rest of the fuselage on a -7 build. Took it to a local machine shop that did TIG welding. I dropped it off on my way to morning coffee and $30 - 30 minutes later.... it was like new. Press on! The canopy of the pre -14 era can be a source of endless patience testing fun....
Easily weldable with tig or torch (I do both). Just bring it up to Montreal and I will do it for free . Walk into any welding shop with cold hard cash and they will do it, likely for a $20 bill. Clean it up, redrill and build on.

Most people are just gluing the canopy on now - avoids cracking. Worth considering. Search on sika flex.
__________________
Scott Black
RV 4, with an engine...and other stuff
VAF dues 2016

Last edited by sblack : 08-21-2018 at 09:22 AM.
Reply With Quote
  #7  
Old 08-21-2018, 09:51 AM
dwranda dwranda is offline
 
Join Date: Jan 2015
Location: Jamestown,NY
Posts: 372
Default

I called shops around town and have an appointment tomorrow to get it welded. I am going to use Sika. I thought I would be doing that this week, but the crack held me up.
__________________
9A in progress
Working on Finish kit!!
Mattituck TMXIO-360 red gold
Dues paid Dec 17
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 03:16 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.