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  #1  
Old 06-29-2020, 04:49 AM
design4p design4p is offline
 
Join Date: Jul 2018
Location: CORWEN
Posts: 64
Default Clunking Canopy when Closing

Hi,

I have a clunking sound when the canopy is being closed. There is no connection with the rear of the canopy and the only connection at the point of clunk is the 2 hinges.

Please view a YouTube movie of the clunk.

It would appear that the hinge connected to the bulkhead jerks at the point of clunk.

Any suggests of a remedy would be most welcome.

John

https://www.youtube.com/watch?v=tzu3...ature=youtu.be
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  #2  
Old 06-29-2020, 11:57 AM
RV7A Flyer's Avatar
RV7A Flyer RV7A Flyer is offline
 
Join Date: Jul 2013
Location: US
Posts: 2,528
Default

Just guessing here, but it sounds like F768 B,C&D Seal Support Angle is catching on the forward face of the canopy frame (a common cause of noises like this). If so, sand them down a touch until they no longer interfere.
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  #3  
Old 07-06-2020, 09:38 AM
design4p design4p is offline
 
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Location: CORWEN
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Default Clunking Canopy when Closing

Thank you for the suggestion.

I've placed a card in the gap between the canopy and the top fuselage and moved it side to side at the point of clonking and the card was still free to move.

I am wondering what else the clonking could be.

John
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  #4  
Old 07-06-2020, 10:58 AM
simpkinsona simpkinsona is offline
 
Join Date: Dec 2010
Location: Vacaville, CA
Posts: 211
Default Worn hinges

I?m not a builder and don?t know much about how the canopy hinges work, but it appears that the hinge is worn oversize. The arm is moving in a linear fashion at the axel of the joint. Either the holes have enlarged or whatever serves as an axel is worn. If it were my airplane I would plan on taking the canopy off and making bushings to resize the holes.

-Andy
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  #5  
Old 07-06-2020, 11:16 AM
design4p design4p is offline
 
Join Date: Jul 2018
Location: CORWEN
Posts: 64
Default Clunking Canopy when Closing

Hi,

Thank you for that - I'm thinking the same that there is play in the holes and or bushes.

My concern here is that it is a new build and the canopy has only been assembled. However, the fuselage is a quick build and was completed by Van's. My input is the canopy built from the parts supplied.

John
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  #6  
Old 07-06-2020, 12:01 PM
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RV7A Flyer RV7A Flyer is offline
 
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Location: US
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Quote:
Originally Posted by design4p View Post
Thank you for the suggestion.

I've placed a card in the gap between the canopy and the top fuselage and moved it side to side at the point of clonking and the card was still free to move.

I am wondering what else the clonking could be.

John
It's not between the *canopy* and the *top fuselage*. It's the flange on the seal support angle is catching on the flat, forward face of the canopy frame. IF that's what it is. Might be something else, dunno, just wanted to make sure you're checking the actual thing I mentioned.
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