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Old 12-24-2018, 01:34 PM
bkervaski's Avatar
bkervaski bkervaski is offline
Join Date: Mar 2017
Location: Birmingham, Alabama
Posts: 1,866
Default Canopy Issue (after paint) ... Heartbreaking

Yikes! (the pic makes it look a lot worse than it actually is)

This happened at the paint shop already during reassembly, the painter fixed it perfect. Happened again this morning. Been about 15 flights in between.

The best I can tell the is that I left the canopy up on it's pins, which keeps it at an angle, on Saturday. Came out today to fly, lifted the canopy, and "pop", this happened. I think what has happened is that it was in a position where the front thin aluminum was touching *every so slightly* and it got a little tacky (temperature change?) and held it in place just long enough for the lip to catch the seal. The more it raised, the more it started bending and digging in.

Already talked with the painter, he can fix it again. Evoke is great, took my call on Christmas Eve, love Jonathan and his team.

The silver you see isn't from the canopy catching, it's from where I cut out some of the proseal so I could get the canopy up to take it off without causing more bending/damage. I had to wedge a credit card under there to get the canopy up, took some paint off the lip in the process.

At any rate, my questions to you guys:

1) Anyone else have this or a similar issue?
2) How much material did you have to take off the factory inset on the front of the canopy for fitting?
3) Any suggestions on how to permanently fix so it doesn't do it again?
4) Would *LOVE* to see pics of your fitment here for comparison.

Right now, my plan is to take about 1/16 of material off the front lip where Vans already provides an inset cut.

It's well fitting canopy, very good clearance all around.

Thoughts/suggestions/comments welcome.

And Merry Christmas everybody

RV-14A #140376
N196 (Flying)
2019 Bronze Lindy

Last edited by bkervaski : 12-24-2018 at 01:45 PM.
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Old 12-24-2018, 01:47 PM
BillL BillL is offline
Join Date: Sep 2007
Location: Central IL
Posts: 6,313

Not unusual, and you did not cause it. The underside of the canopy skin must be tapered and the upper side of the forward skin. The gap closes when opening and if tight down does not lift fast enough (several reasons) the skins will butt and bend. I have a spot just like that (-7) and currently have a strip of UHMW tape under it.

That area is well known to the 7 crowd, at least the tip ups.

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Old 12-24-2018, 03:36 PM
Stockmanreef Stockmanreef is offline
Join Date: Nov 2012
Location: Midland, mi
Posts: 963

I did that during assembly when I had the skin clecoed in place. I had opened and closed a number of times, then it caught. I am concerned about this long term. I don't have the top skin in place permanently in place yet.
Ken Stockman
Midland, MI
EAA Chapter 1093 member

FaceBook Page: Ken's RV-14
RV-14a (serial number 140073)

Plane at hangar and the wings ON.
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Old 12-24-2018, 03:40 PM
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JTJones JTJones is offline
Join Date: Jun 2015
Location: Haleiwa, HI
Posts: 151
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I had the same thing happen on my -14. Happened twice. First time was after paint when the canopy was opened for the first time. Filed back/beveled the skin some more. Second time the plane had been sitting on the ramp in the sun and things expanded. Lifted the canopy and heard the ?pop.? ****! Filed back/beveled some more. All good now except the skin is bent and I haven?t been able to unbend it. Now she's no longer perfect but I still love her!
Jeffrey T Jones
RV-14 N588TJ Completed
First Flight July 10, 2018
Flight testing completed August 14, 2018
2021 VAF dues paid plus beer money😜
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Old 12-24-2018, 04:30 PM
JHartline JHartline is offline
Join Date: Dec 2012
Location: Carrollton, GA 5GA2
Posts: 288
Default Mine too

After several fittings, multiple openings and closings and thinking I had it dialed-in mine grabbed near the right clip cover. Bent the canopy skin down as well. I?m still building but I?ll have to circle back to the canopy chapter and work on that some more.

My forward seal is visible between the canopy and forward skins when it?s closed and locked. I know I placed it properly but I?m going to remove and replace. I think it may have been part of my problem.
James Hartline
Carrollton, GA 5GA2
RV-14 - First flight 4/7/2019. Phase I complete as of 9/11/2019!!
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Old 12-24-2018, 04:51 PM
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rocketbob rocketbob is offline
Join Date: Jun 2006
Location: 8I3
Posts: 3,758

The flaw here has to do with the relatively short/compact canopy hinges Van's uses on the tipups. If the hinge points were moved a few inches forward, the skin would not catch. Take a look at the Lancair Legacy canopy hinges to see what I'm talking about.

Please don't PM me! Email only!

Bob Japundza CFI A&PIA
N9187P PA-24-260B Comanche, flying
N678X F1 Rocket, under const.
N244BJ RV-6 "victim of SNF tornado" 1200+ hrs, rebuilding
N8155F C150 flying
N7925P PA-24-250 Comanche, restoring
Not a thing I own is stock.
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Old 12-24-2018, 07:12 PM
Bavafa Bavafa is offline
Join Date: Oct 2007
Location: Sacramento, CA
Posts: 3,639

Originally Posted by JHartline View Post
My forward seal is visible between the canopy and forward skins when it?s closed and locked.
Mine was the same, I end up moving it every a bit back thru multiple tries. I did not take a picture but as I recall the seal is about 1/8" to possibly 3/16' aft of the edge of the skin. Thru a simple water hose test, it does not leak but time will tell as the force of the rain at high speed could prove different.
N825SM RV7A - IO360M1B - SOLD
N825MS RV14A - IO390 - SOLD
N258SM RV14A - IO390EXP119 - in progress
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Old 12-26-2018, 10:47 AM
bkervaski's Avatar
bkervaski bkervaski is offline
Join Date: Mar 2017
Location: Birmingham, Alabama
Posts: 1,866

Thanks for the feedback all!

The consensus so far seems to be that I need to taper the canopy bottom skin and perhaps shave back the skin another 16th.

Keep the suggestions coming
RV-14A #140376
N196 (Flying)
2019 Bronze Lindy
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Old 12-26-2018, 11:55 AM
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Bill Boyd Bill Boyd is offline
Join Date: Sep 2006
Location: Landing field "12VA"
Posts: 1,707

My 6A did this decades ago - the bend in the skin is still there despite filing it back multiple times and attempting to counter-bend it back to straight. It's due to the pneumatic lift struts pushing forward pretty hard on the canopy when it's closed, as well a failure to relieve and bevel the skin edges as described.

If it makes you feel better, it's now among the least noticeable blemishes on my 20 year old airframe and paint job.
Bill Boyd

Hop-Along Aerodrome (12VA)
RV-6A - N30YD - Built '98 / sold '20
RV-10 - N130YD - 50 hours +
65 years running stock DNA
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Old 12-26-2018, 04:43 PM
bkervaski's Avatar
bkervaski bkervaski is offline
Join Date: Mar 2017
Location: Birmingham, Alabama
Posts: 1,866

The issue isn't with the skins touching .. the issue, after some research, is the proseal application. This is a much bigger issue than I initially thought that will take some time to remedy. Very discouraging.

This is a QB fuse and the QB folks ran the sealant bead too high. They ran it all the way to the F-01471 top skin effectively creating an angle for the front of the canopy skin to have an opportunity to grab where the intent is for it to sit parallel to the top of F-01455.

I'm going to have to dig out the seal and re-apply it properly. Hopefully, the plugs in the various holes on F-01455 won't come out in the process.

When I pull the seal a good bit of that edge will need refinishing and blended so it's going to cost me a few bucks and, sadly, a good bit of downtime.

I've also noticed the same incorrect proseal application on some builder blogs out there while doing research where, for aesthetics, that seal is being run up to the F-01471 skin. Hoping those guys get lucky and it's not an issue for them.
RV-14A #140376
N196 (Flying)
2019 Bronze Lindy

Last edited by bkervaski : 12-26-2018 at 04:56 PM.
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