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  #1  
Old 01-19-2018, 01:39 PM
bkervaski's Avatar
bkervaski bkervaski is offline
 
Join Date: Mar 2017
Location: Birmingham, Alabama
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Default Attaching the canopy to a QB fuselage ... is this a problem?

This is a QB fuse.

On page 35-22 it shows the location of a fuel tank sealant line as follows:



Getting ready to attach my canopy and this is the shape of the fuel tank sealant line from the QB team:



As you can see, it goes right up to F-01471 Fuselage Top Skin. I'm concerned that the canopy won't seat properly.

Any thoughts or advice from those that have completed the canopy install?

And .. if needed, is there a way to cleanly trim down the sealant?
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  #2  
Old 01-19-2018, 02:35 PM
rkbrown819 rkbrown819 is offline
 
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Location: Cape Cod, MA
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Mine looked exactly the same as your picture and the canopy fit perfectly.
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  #3  
Old 01-19-2018, 03:31 PM
Jake14 Jake14 is offline
 
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Location: Seattle
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here's what my QB fuse looked like.... remember there's also a rubber seal on the canopy frame which contacts that surface (38-34)..I think it needs to be trimmed

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Last edited by Jake14 : 01-19-2018 at 03:49 PM.
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  #4  
Old 01-19-2018, 03:36 PM
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jeffw@sc47 jeffw@sc47 is offline
 
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Location: Simpsonville, SC (SC47)
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Quote:
Originally Posted by bkervaski View Post
I'm concerned that the canopy won't seat properly.

Any thoughts or advice from those that have completed the canopy install?
Something that I came up against, was that the sealant exposed on the forward fuselage top where the canopy comes down to when the canopy is closed - depending on how long the canopy is in the closed position - - the front leading edge of the canopy aluminum skin will stick to that sealant, and when you raise the canopy it will hold onto that skin edge and pull it down, deforming it like it was interfering with the fuselage skin. I found that I had to trim that sealant so that it did not have a lot of contact with the front leading edge of canopy aluminum skin. Trimmed it with an Xacto blade and a steel putty knife edge.

Recommend that you lower the canopy frame carefully and slowly - successive iterations - and try to get an idea of how much contact to the sealant you have to deal with. Trim very little as you go.
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  #5  
Old 01-20-2018, 02:32 AM
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Location: Stockholm, Sweden
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By comparing to mine, I would say that some very minor trimming of the sealant on the last 1 mm towards the front skin might be necessary.

Do not forget to carefully check for interference between the aluminium skins as well. I hardly had to touch it but in a few places I trimmed away less than 1/32 inch.
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  #6  
Old 01-20-2018, 03:54 PM
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bkervaski bkervaski is offline
 
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Thanks, all.

We fit it today, went well, no complaints.

Any tips on the mounting the plexiglass?
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  #7  
Old 01-20-2018, 04:10 PM
Don E Don E is offline
 
Join Date: Aug 2016
Location: West Chester, PA
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Default Canopy fit

My only comment would be that I tried too hard to make it fit without trimming it. Once I decided to trim about a quarter inch off the aft edge and about 3/16 off the bottom of both sides, it all went very well. I just really did not want to trim, and it turned out to be easy with a belt sander.
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  #8  
Old 01-20-2018, 07:53 PM
mturnerb mturnerb is offline
 
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Quote:
Originally Posted by bkervaski View Post
Thanks, all.

We fit it today, went well, no complaints.

Any tips on the mounting the plexiglass?
Any trimming?
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  #9  
Old 01-21-2018, 08:09 AM
Bavafa Bavafa is offline
 
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If there is any cutting/trimming involved, I will make sure the area to work in is pretty darn warm, reduces the chance of cracking. I am planning on leaving this part for the warmer weather but I am far behind you and still ways to go.
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  #10  
Old 01-21-2018, 08:13 AM
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Not about trimming the plexi, but get two or more rolls of some non-black electrical tape for the fairing work (there is another tread about that)
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