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  #1  
Old 03-02-2021, 09:29 PM
AlpineYoda AlpineYoda is offline
 
Join Date: Nov 2019
Location: Boulder, CO
Posts: 264
Default Upper cowl retention plate

Has anyone else had an issue with the RV-10 upper cowl retention plate (for the upper cowl hinge pins) spacing? The part is about 1 3/4 inches wide, yet the spacing between the hinges in the cowls is far less. I’ve double checked the plans and I am 99% that I did everything right on the upper cowl hinges. One rivet hole open at the top, hinges attached to the firewall on either side of that rivet, in the first rivet either side. Those are NOT leaving 1 3/4 inch spacing between them. I am going to modify the retention parts to fit as best I can (they aren’t structural, so no big worries here) but I’m a little confused why this fits so badly. Did Van’s drop the ball here with their design? Or did I really screw this up? Anyone else had the same issue? I searched a variety of keywords on this site and saw nothing about this. Thanks!
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Started 12/19/2019
Engine hung 1/9/2021
Panel in 2Q 2021
Flying fall 2021?

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  #2  
Old 03-03-2021, 09:18 AM
lr172 lr172 is offline
 
Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 5,880
Default

Mine fit without an significant modification. I did examine this spacing (you need to read ahead in the plans more) and insured it would be there when setting up the hinges for drilling, so can't say for sure if the plans are correct or not.

While step by step instructions are nice, I cut my teeth on a 6, where the plans are more drawings than instructions. It drives a greater discipline in understanding what you are building and forces a measure twice / cut once mentality.

You would be wise to study ahead and get a full picture of everything and how it fits together to before drilling/fitting.

Larry
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N11LR - RV-10, Flying as of 12/2019

Last edited by lr172 : 03-03-2021 at 09:24 AM.
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  #3  
Old 03-03-2021, 09:29 AM
philb philb is online now
 
Join Date: Apr 2005
Location: Salt Lake City
Posts: 180
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yep, mine is completely off, too.
I've had so much fun flying haven't had a chance to fix it yet! will probably get around to it when I paint - the hinge pins are so tight they don't move.

Phil
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  #4  
Old 03-03-2021, 11:22 AM
Bill Boyd's Avatar
Bill Boyd Bill Boyd is offline
 
Join Date: Sep 2006
Location: Landing field "12VA"
Posts: 1,634
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Mine is currently flying without the plate because while it fits fine, it is currently misplaced somewhere in the shop or the hangar. My chief concern with leaving it out longer term is not the pins ever going anywhere, but the chance of an oil mist covering the windscreen more easily in the event of a plumbing mishap in flight.
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Hop-Along Aerodrome (12VA)
RV-6A - N30YD - Built '98 / sold '20
RV-10 - N130YD - Phase 1 flying

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  #5  
Old 03-04-2021, 08:28 AM
AlpineYoda AlpineYoda is offline
 
Join Date: Nov 2019
Location: Boulder, CO
Posts: 264
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Quote:
Originally Posted by philb View Post
yep, mine is completely off, too.
I've had so much fun flying haven't had a chance to fix it yet! will probably get around to it when I paint - the hinge pins are so tight they don't move.

Phil
Thanks for the confirmation. Another site for RV-10 builders had some agreement that this is a pretty common issue, too.


I found that the gap between the hinges was 1.46 inches, while the plate is 1.75 inches wide. I was able to shave a little off both sides of the retention plate and then trimmed a little off the in-place ends of the hinges. Seems to fit now. I also added some tinnerman washers to increase the strength of the countersunk fiberglass.
__________________
RV-10 build blog -- https://eaabuilderslog.org/?blproject&proj=7ZSwfzr2g
Started 12/19/2019
Engine hung 1/9/2021
Panel in 2Q 2021
Flying fall 2021?

N1814T reserved with FAA
Donated Jan 11 for 2021, EAA and AOPA member
Reply With Quote
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