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  #1  
Old 07-12-2018, 10:13 AM
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bmarvel bmarvel is offline
 
Join Date: Aug 2005
Location: Grand Junction, CO
Posts: 39
Default Canopy water leak

One of the very few problems I have had with the -14A is water dripping through the seal on the forward edge of the canopy. Having owned an -8A previously for some 15 years, I never experienced this because of its slider. This leak issue may also be a problem with other tip up models.

In my airplane the leak "appears" to be from the area of the two hinge covers. But as you know, water leaks in roofs and automobile rattles can originate from locations different from where they finally show up.

This could be avoided with a canopy cover but I don't use an external one to prevent plexi scratching. I made up an internal cover instead. The airplane is normally in a hangar so the problem does not occur frequently. But to avoid it on overnight trips when rain is expected, I cover that long joint line and the hinge covers with white electrical tape. This isn't elegant but it works and the tape comes off easily with no residue.

Am curious if any of you with flying airplanes have addressed this with possibly a different seal configuration.
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Grand Junction, CO
RV-8A N751MB -1700 hours, sold
RV-14A N465MM - 325 hours and climbing
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  #2  
Old 07-12-2018, 11:04 AM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
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Flight testing was done on the prototypes to evaluate and prove that the canopy will seal out water, but the seals have to be installed (and the area they are install, prepe'ed properly) exactly as specified in the construction manual.
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  #3  
Old 07-12-2018, 11:36 AM
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bmarvel bmarvel is offline
 
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Location: Grand Junction, CO
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Did all that Scott, but still have the leak problem.

Getting the tank sealant bevel "in plane" across the joint was difficult and maybe not good enough in my situation. I used the called out sealant on the hinge covers and installed them per the plans and yet still don't know the source of the leaks (one appears on each side). But at least it's a problem with an easy work around for me.

Since this kit and airplane have been just about perfect, I wanted to point this problem out to other builders just as I did recently with the plastic versus aluminum eyeball vents.

Thanks for the quick response. Will see you at OSH if you're there.
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Bill Marvel
Grand Junction, CO
RV-8A N751MB -1700 hours, sold
RV-14A N465MM - 325 hours and climbing
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  #4  
Old 07-12-2018, 11:39 AM
rvbuilder2002 rvbuilder2002 is offline
 
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Location: Hubbard Oregon
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Quote:
Originally Posted by bmarvel View Post
Did all that Scott, but still have the leak problem.

Getting the tank sealant bevel "in plane" across the joint was difficult and maybe not good enough in my situation. I used the called out sealant on the hinge covers and installed them per the plans and yet still don't know the source of the leaks (one appears on each side). But at least it's a problem with an easy work around for me.

Since this kit and airplane have been just about perfect, I wanted to point this problem out to other builders just as I did recently with the plastic versus aluminum eyeball vents.

Thanks for the quick response. Will see you at OSH if you're there.
Did you use polyester filler (bondo) to fill the areas specified?
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RV-6A (aka "Junkyard Special ")
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  #5  
Old 08-03-2018, 04:40 PM
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Louavul Louavul is offline
 
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Location: Rio Communities, NM
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Scott: Are you saying that there is language in the documents stating that there is a process for sealing particular areas in the canopy installation?

Please forgive me but, in my first generation -7 docs (that I'm currently using in hopes of finishing someday) I can't find any info about installing any sealant/bondo or even any bulb seal.

Although I'm not building a -14 I do get the sense the the assembly instructions for all models have been improved dramatically. Is there somewhere I can review the current assembly instructions for tip up canopies and/or the -7 in general?

Thanks,
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Last edited by Louavul : 08-03-2018 at 04:45 PM. Reason: additional thoughts
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  #6  
Old 08-03-2018, 05:11 PM
rvbuilder2002 rvbuilder2002 is offline
 
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Location: Hubbard Oregon
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Quote:
Originally Posted by Louavul View Post
Scott: Are you saying that there is language in the documents stating that there is a process for sealing particular areas in the canopy installation?

Please forgive me but, in my first generation -7 docs (that I'm currently using in hopes of finishing someday) I can't find any info about installing any sealant/bondo or even any bulb seal.

Although I'm not building a -14 I do get the sense the the assembly instructions for all models have been improved dramatically. Is there somewhere I can review the current assembly instructions for tip up canopies and/or the -7 in general?

Thanks,
The canopy design on the RV-14 is quite different from the one on the RV-7. My comment was regarding the RV-14 canopy and plans.
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  #7  
Old 08-04-2018, 07:01 AM
BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
Posts: 4,443
Default The 7 is more challenging than the 14, a different design.

Quote:
Originally Posted by Louavul View Post
Scott: Are you saying that there is language in the documents stating that there is a process for sealing particular areas in the canopy installation?

Please forgive me but, in my first generation -7 docs (that I'm currently using in hopes of finishing someday) I can't find any info about installing any sealant/bondo or even any bulb seal.

Although I'm not building a -14 I do get the sense the the assembly instructions for all models have been improved dramatically. Is there somewhere I can review the current assembly instructions for tip up canopies and/or the -7 in general?

Thanks,
Instructions and design are vastly improved for the later models.

For the 7 - - The seal is more like a teardrop shape, is very low contact pressure and not much compression. This means the perimeter gap must be correct and even. No such instructions for the 7 like the 14. The manufacturer says the adhesive life is limited and it even has a born-on date. Be sure you look at that and install soon after procurement, or be prepared to buy it again. Vans is the best source. I tried alternatives to this vans-recommended-supplied seal and the perimeter forces to compress didn't allow the canopy latch work properly (not to my satisfaction). There are many cracks and gaps to be filled, but the Vans seal will fit. I have not tested it yet, but plan a vacuum on blow attached to the vents, then will spray soapy water on the perimeter. My Phase I is complete now and the detailing begins.
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