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  #1  
Old 07-09-2021, 07:40 AM
acam37's Avatar
acam37 acam37 is offline
 
Join Date: Aug 2012
Location: Lufkin Tx
Posts: 758
Default Deformed wingtips

These wingtips were severely deformed by someone who shrink wrapped a set if wings in a wing rack for transport. Is there a way to restore the shape? I was thinking about using a heat gun or sitting them out in the Texas sun then filling them with something to hold the shape until they cooled off.
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  #2  
Old 07-09-2021, 08:45 AM
John Tierney John Tierney is offline
 
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Location: Vonore, TN
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The Texas heat may help. I'd suggest cobbling together some materials to hold the tips upright, like the hull of a boat. Some Styrofoam temporary ribs wedged inside might help to encourage a return to shape.

There will probably be cracks in the paint/gel coat. You might consider reinforcing the tips with the Wingtip Tips from Darwin on this page: https://vansairforce.net/articles.htm
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  #3  
Old 07-09-2021, 09:13 AM
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acam37 acam37 is offline
 
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If they are salvageable they will be stripped for painting so Iím not worried about cracked paint or gelcoat
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  #4  
Old 07-09-2021, 09:41 AM
Ralph Inkster Ralph Inkster is offline
 
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Location: Calgary, Alberta
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Wow, unfortunate! A real good note to others to not shrink wrap their wing!

I was never satisfied with any of my efforts to extract warps out of wing tips with heat. In one case, I layed up repair panels & spliced them in the affected areas. And I was only dealing with minor warpage in those cases.

In your case, with severely warped tips, it might be worthwhile to consider replacing them totally. Maybe perfect time to update with the later W-715 tips????
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  #5  
Old 07-09-2021, 11:29 AM
abwaldal@gmail.com abwaldal@gmail.com is offline
 
Join Date: Jan 2017
Location: Battle Ground WA
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Default HOLY batman

Those suckers look like they are toast. But, I'm the kind of guy that would work hard to straighten them cause I like challenges. Heat, fake ribs, time, But, they look really screwed up.
Let us know how it turns out.
Good luck Art
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  #6  
Old 07-09-2021, 11:53 AM
Desert Rat Desert Rat is offline
 
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Location: Wichita KS
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Mine weren't as bad as yours, but I went through this with a set of wingtips that had been stored one inside the other for about 10 years.

I got them looking pretty good, but it took several hours with a heat gun and some pretty heavy weights. It's a very try-and-see-what-happens approach.

Basically, I heated the area I wanted to work on and then using a combination of weights, clamps, tape, string etc, held them in the position I wanted while they cooled. One of them off in multiple directions. It was too narrow overall, but the edges were pooched out like a teenage girl making duck lips for a selfie.

For that one, I made a wing cross section shape out of pink foam to stuff inside it, then fastened about a million cleco clamps on the edges. As I heated it up, I drew the edges together with string that was laced around the clamps like a shoe lace.

They came out okay and have been drilled and clecoed onto my wings for about a year now, so hopefully I don't get any surprises when I take them back off to get them ready for final fitment.

The whole process took several hours and was pretty frustrating, but better than buying new wingtips!

Here are a couple of pix that show part of my process

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  #7  
Old 07-09-2021, 04:33 PM
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The boss actually has a set of W-715's that came off a Rocket. I may suggest that he donate them to the cause. I was hoping someone had success in getting fiberglass to go back into shape, but these may be too far gone. I'm just trying to help a customer out before giving up.
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  #8  
Old 07-09-2021, 08:05 PM
Norman CYYJ Norman CYYJ is offline
 
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You might try using foam ribs to hold them in the right shape and then put a layer of glass in or on them. When it sets up hard it maybe enough to hold the shape. You could also use some 3/8 hemp rope for ribs they would hold it when cured. Use to use the rope trick for ribs when making canoes. Structurally very strong.
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  #9  
Old 07-09-2021, 08:24 PM
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wirejock wirejock is offline
 
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Location: Estes Park, CO
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Default W715

Quote:
Originally Posted by acam37 View Post
The boss actually has a set of W-715's that came off a Rocket. I may suggest that he donate them to the cause. I was hoping someone had success in getting fiberglass to go back into shape, but these may be too far gone. I'm just trying to help a customer out before giving up.
I would go with the new ones. Especially if they are grey gel coat. Finish is much better.
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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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  #10  
Old 07-10-2021, 09:30 AM
Ralph Inkster Ralph Inkster is offline
 
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Quote:
Originally Posted by acam37 View Post
The boss actually has a set of W-715's that came off a Rocket. I may suggest that he donate them to the cause. I was hoping someone had success in getting fiberglass to go back into shape, but these may be too far gone. I'm just trying to help a customer out before giving up.
Rocket- check if it was a Harmon or F-1. The Harmon has the same airfoil, the F-1 is slightly different.
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