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  #1  
Old 05-01-2023, 06:29 PM
nohoflyer nohoflyer is offline
 
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Location: Brooklyn, NY
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Default Enlarge holes in gear mount 7A?

The powder coating in the holes of the gear mount weldement create a pretty tight fit for the bolts. Did anyone run a reamer through them?
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  #2  
Old 05-01-2023, 06:33 PM
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Default Gear weldments

Quote:
Originally Posted by nohoflyer View Post
The powder coating in the holes of the gear mount weldement create a pretty tight fit for the bolts. Did anyone run a reamer through them?
Vans told me to file the area as required. Mine were just off in alignment to the wing spar holes. Lots of on and off. It wasn't fun.
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  #3  
Old 05-01-2023, 07:14 PM
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Louavul Louavul is offline
 
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Default

I was told specifically by Scott McDaniels at Vans NOT to ream the holes.
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  #4  
Old 05-01-2023, 07:39 PM
nohoflyer nohoflyer is offline
 
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I’m having a hard time fitting it. It doesn’t go in and out very easily. I removed the little rib on the main spar which helped but the main spar flange on top interferes.
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Last edited by nohoflyer : 05-02-2023 at 02:13 PM.
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  #5  
Old 05-01-2023, 08:51 PM
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PaulvS PaulvS is offline
 
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Location: Western Australia
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Default

Which bolt holes are you questioning; the 5/16" for the gear legs, or the bolts that attach the mount to the spar? The 5/16 should not be enlarged and the single bolt should be a snug fit. The bolts that attach the mount to the spar can be reamed to fit, it is not that critical, these holes are actually drilled by the builder in the older kits, so there is some tolerance.
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Last edited by PaulvS : 05-01-2023 at 08:53 PM.
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  #6  
Old 05-02-2023, 07:42 AM
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Default Nutplates

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Originally Posted by nohoflyer View Post
Iím having a hard time fitting it. It doesnít go in and out very easily. I removed the little tub on the main spar rib which helped but the main spar flange on top interferes.
There were two or three nutplates each side that caused me trouble. I removed them and the weldment slipped right in. I used a borescope to look through the spar holes to identify interference. Marked the locations. Removed and filed. Lather, rinse, repeat. Took about 10 trips. Very little removed.
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Builder Blog: http://wirejockrv7a.blogspot.com
Donated 12/2022, plus a little extra.
RV-7A #73391, N511RV reserved
Disclaimer
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  #7  
Old 05-02-2023, 01:07 PM
nohoflyer nohoflyer is offline
 
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Location: Brooklyn, NY
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Default

Thanks Larry about the nutplates. I removed them and things got much easier.


Turns out my other problem was solved when I noticed an interfering rivet (both sides). It was of the the 426 4-6 rivets in the gear attach web. I filed down the weldement around the rivet and it then fit nicely.
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  #8  
Old 05-02-2023, 02:36 PM
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Default Double flush rivets

Quote:
Originally Posted by nohoflyer View Post
Thanks Larry about the nutplates. I removed them and things got much easier.


Turns out my other problem was solved when I noticed an interfering rivet (both sides). It was of the the 426 4-6 rivets in the gear attach web. I filed down the weldement around the rivet and it then fit nicely.
There's about five double flush skin rivets either end of the Center Section. If they were standard shop heads, they won't allow the weldment to fit correctly

Also, check plans carefully. There's a washer inserted somewhere as a spacer. Sorry, cant remember exactly where vut it has to be there or the weldment won't sit flush.
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Larry Larson
Estes Park, CO
E-mail: wirejock at yahoo dot com
Builder Blog: http://wirejockrv7a.blogspot.com
Donated 12/2022, plus a little extra.
RV-7A #73391, N511RV reserved
Disclaimer
I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
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  #9  
Old 05-02-2023, 03:13 PM
nohoflyer nohoflyer is offline
 
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Location: Brooklyn, NY
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Default

Would have missed it thx.

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