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  #1  
Old 01-10-2020, 02:58 PM
KayS KayS is offline
 
Join Date: Jul 2009
Location: lake constance
Posts: 247
Default wing tip slicing

Hi together,
my 7-wingtip trailing edges are 1/4 to 1/2" above the trailing edges of the ailerons in neutral Position. General fix is to slice the the rear edge of the wing tips and glue them back together to match the ailerons.

Well, i sliced the rear trailing edges but only the inner parts of the wing tips matches with ailerons. the outboard portion of the trailing edge stays where it was.

is it ok to slice also the side of the wing tips until one can move the entire trailing edge down? What did you guy do?

Cheers
Kay
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  #2  
Old 01-10-2020, 03:58 PM
Kyle Boatright Kyle Boatright is offline
 
Join Date: Aug 2005
Location: Atlanta, GA
Posts: 4,218
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It is fiberglass. Do what you need to do to make it fit. You can re-glass it and the change will be invisible.
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  #3  
Old 01-10-2020, 04:33 PM
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snopercod snopercod is offline
 
Join Date: Aug 2016
Location: Asheville, NC
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Being fiberglass, you can heat it and lock it in place with clamps or something. It will take a permanent set when the clamps are removed.
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  #4  
Old 01-10-2020, 06:40 PM
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Vlad Vlad is offline
 
Join Date: Oct 2008
Location: Utah
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Quote:
Originally Posted by KayS View Post
Hi together,
my 7-wingtip trailing edges are 1/4 to 1/2" above the trailing edges of the ailerons in neutral Position. General fix is to slice the the rear edge of the wing tips and glue them back together to match the ailerons.

Well, i sliced the rear trailing edges but only the inner parts of the wing tips matches with ailerons. the outboard portion of the trailing edge stays where it was.

is it ok to slice also the side of the wing tips until one can move the entire trailing edge down? What did you guy do?

Cheers
Kay
It is OK to slice the side of the wingtip. My buddy brought his wingtip inline by cutting at the trailing edge and about 6 inches on the side.
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  #5  
Old 01-10-2020, 06:54 PM
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N941WR N941WR is offline
 
Join Date: Jan 2005
Location: SC
Posts: 12,887
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First, make sure the aileron is in the correct place. The, take your Drimmel and slice the trailing edge and up the side, along the part line.

With the ailerons locked in place, move the wingtip trailing edge into place and drill some holes in it and cleco it together.

Then lay a couple of layers of fiberglass on the inside to lock it in place. Next is to remove the clecos and fill the slits and holes.
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  #6  
Old 01-10-2020, 07:46 PM
Stoo Stoo is offline
 
Join Date: May 2006
Location: LL10, Naperville, IL.
Posts: 68
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I found cyanoacrylate useful for aligning the tip after slitting. Hold it where you want it, run in some cyanoacrylate and spritz it with accelerator.
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  #7  
Old 01-11-2020, 03:12 AM
KayS KayS is offline
 
Join Date: Jul 2009
Location: lake constance
Posts: 247
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Thanks for the replies! My concern was that i could change the aerodynamic character of the wing tips to much. I am no expert on aerodynamics but if you slice the wing tip and push the trailing edges downwards: the wing tip gets a more "dolphin shape". does this matter?

general consensus is that the entire trailing edge should be level with the aileron?
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  #8  
Old 01-11-2020, 07:08 AM
BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
Posts: 5,516
Default Mine are bat wing tips but . . .

Quote:
Originally Posted by Vlad View Post
It is OK to slice the side of the wingtip. My buddy brought his wingtip inline by cutting at the trailing edge and about 6 inches on the side.
I just sliced mine but only because the trailing edge was 3/8" thick and I wanted a more matched profile to the aileron.

Back to slicing - - If the outer edge is not cut it will be hard to get the TE to move. Mine needed about a 3" slice up the side/end.

A dremel was not enough depth to separate completely, I had to use a 4" cutting disc and part of the joint still needed a hack saw blade to finish.

I used Hysol to rebond - - and be sure you take care to not only align but keep the edge straight.

Should go without saying, but the aluminum wedge will need to be removed.
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