VansAirForceForums  
Home > VansAirForceForums

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

- Today's Posts | Insert Pics

  #11  
Old 01-14-2019, 12:01 PM
AirHound AirHound is offline
 
Join Date: Oct 2006
Location: OFallon IL now, everywhere before
Posts: 301
Default

Quote:
Originally Posted by DaleB View Post
We've already done the rear window with Sikaflex. We'll be doing the canopy this Spring when it warms up enough to do the fiberglass work, I hope. I'll post pics. We've got the frame and canopy ready go, just need the time to finish it.
Sweet,

Dale,
My non-builder sensing is; there are two types of 12 owners, those that have had to replace glass and those that will have to!

Any info on easier technique and alternate acceptable materials is useful to me.

Thanks!
Doug in IL
__________________
Doug
Reply With Quote
  #12  
Old 01-14-2019, 12:27 PM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 8,210
Default

Quote:
Originally Posted by AirHound View Post
Sweet,

Dale,
My non-builder sensing is; there are two types of 12 owners, those that have had to replace glass and those that will have to!

Any info on easier technique and alternate acceptable materials is useful to me.

Thanks!
Doug in IL
As you (as a non builder) gain knowledge, I think you will find that bonding a canopy on with Sika is not an easier technique, nor does it make the canopy easier to replace if it should ever have to be (which based on 10,000 plus RV's built and flying over a period of 40 + years, needing to do a replacement is actually a pretty low probability).
__________________
Any opinions expressed in this message are my own and not necessarily those of my employer.

Scott McDaniels
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
Reply With Quote
  #13  
Old 01-14-2019, 01:28 PM
DaleB's Avatar
DaleB DaleB is offline
 
Join Date: Sep 2012
Location: Omaha, NE (KMLE)
Posts: 2,045
Default

Scott is right in that you probably won't ever need to replace the canopy or rear window.

When I bought this one, the rear windows was the original polycarbonate. It was badly crazed and cracked from contact with MOGAS, and looked like ****. It wasn't getting any better with time. During the CI the year before last, we pulled the rear window and replaced it with the new acrylic window, using Sika instead of screws. Looks great, wasn't a big challenge to do. You just have to figure out how to hold the window in place from inside while the adhesive cures. An air mattress and exercise ball did the trick. We're REALLY happy with how well it turned out.

The bottom right corner of the canopy was also broken from a wind incident before I bought it. A good sized chunk of acrylic was broken out, and there were a couple of cracks. Nothing that couldn't be fixed if you don't mind the repairs showing, but then we discovered that the weld was broken, too. That was the tipping point. I put in a temporary fix -- structurally OK, but not too pretty. I have a new frame and canopy here. I don't know that the Sikaflex will be any more or less difficult than the screws and rivets... more taping and all, but zero drilling. Everything sits perfectly in place, so we won't need to go through some of the clamping gyrations I've seen others with RV-7s and 8s. I am thinking about maybe using fiberglass instead of aluminum for the side skirts... haven't decided yet.

Like I said, I'll post the process and results here once we get around to finishing it. I will say this: I was a little leery of the Sikaflex, but after seeing it in its final state -- no way that canopy will ever work loose. It's some pretty tough stuff.
__________________
Dale

Omaha, NE
RV-12 # 222 N980KM "Screamin' Canary" (bought flying)
Fisher Celebrity (under construction)
Previous RV-7 project (sold)
Reply With Quote
  #14  
Old 01-17-2019, 11:23 AM
RFSchaller RFSchaller is offline
 
Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 2,470
Default

With regard to the back window I would agree that the newer molded one will probably last for the life of the plane, but the older flat lexan windows had a fair amount of residual stress due to conforming to the curve of the frame and seem to craze easily. My original one was crazed within a year. So far I have three years on the new molded rear window and it still looks factory new.
Reply With Quote
  #15  
Old 01-17-2019, 03:59 PM
pilotyoung pilotyoung is offline
 
Join Date: Jan 2018
Location: Birmingham, AL
Posts: 122
Default Rear Window

My airplane was certified in 2013. I did not build it. But it is on the second rear window, the original kind, and this one is crazed badly. I put a decal over it to try to cover it up but it is still visible. I am going to live with it for a while and then put the new style in.
__________________
John D. Young, RV-12 Owner
Serial Number 120022, N6812Y
Bought it as a flying airplane in Feb. 2018
Just passed 140 hours flight time in RV-12, and 10,000 hours mostly in corporate jets. I am a CFI; CFII; MEI; and a advancd Ground Instructor, CFIG; and hoping to be able to help new RV-12 owners by doing some transition training for new builders and owners in RV-12's.
Reply With Quote
  #16  
Old 01-17-2019, 07:13 PM
AirHound AirHound is offline
 
Join Date: Oct 2006
Location: OFallon IL now, everywhere before
Posts: 301
Default

Quote:
Originally Posted by pilotyoung View Post
My airplane was certified in 2013. I did not build it. But it is on the second rear window, the original kind, and this one is crazed badly. I put a decal over it to try to cover it up but it is still visible. I am going to live with it for a while and then put the new style in.
What about just paint it from the inside?
__________________
Doug
Reply With Quote
  #17  
Old 01-17-2019, 10:41 PM
pilotyoung pilotyoung is offline
 
Join Date: Jan 2018
Location: Birmingham, AL
Posts: 122
Default Canopy

The builder put a metal piece over the rear window after is crazed the first time. He did it before he had the aircraft painted and it looked pretty good. But when he decided to sell it, he replaced the rear window. I had it a few months when it crazed again.
__________________
John D. Young, RV-12 Owner
Serial Number 120022, N6812Y
Bought it as a flying airplane in Feb. 2018
Just passed 140 hours flight time in RV-12, and 10,000 hours mostly in corporate jets. I am a CFI; CFII; MEI; and a advancd Ground Instructor, CFIG; and hoping to be able to help new RV-12 owners by doing some transition training for new builders and owners in RV-12's.
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 04:13 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.