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Old Sep 19, 2006, 12:50 PM
gorgeflyer is offline
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Leading Edge Leading Edge?


I started the spar for a LEG Hellcat last night and it got me to thinking about my last build with epp. I love the finished product but hate taping the leading edge of the wing. Have any of you guys used a basswood leading edge? Or maybe take it a step further and use a carbon rod? I am not worried about hitting a rock on landing or anything like that so I don't see why not. Should also add a little weight which isn't a bad thing either. I want to be able to keep up with Vic pumping half pipes next time I fly with him.
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Old Sep 19, 2006, 01:12 PM
legliderman is online now
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All work and no play
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Dont see why it wouldnt work. DO IT!
Old Sep 19, 2006, 01:32 PM
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Should work great, but IMO, goes a "little" beyond the point of building a foamy.

I was thinking this same thing on my last build. I hate where the top and bottom tape layers meet. You can't get a SUPER clean line there so my idea next time is this...

Use a TON of thinned goop on the LE, tape the wing normally, and then where the tape meets at the LE run a bead of goop over it and smooth it down as clean as possible. Now put a piece of the 3" wide thin cheap masking tape to smooth it down till it tacks up.... Once it's mostly dry smooth it down with a rag soaked in Toluene...

Should be a bomb-proof, but pliable LE when need be...

Just an idea...

-Don
Old Sep 19, 2006, 01:51 PM
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I figured a half dozen passes over the LE with some primer over the Solartex before paint would be enough buildup to get rid of that bump.

I'm done taping my P40 wing and will try that over the LE and the tips where I couldn't get it absolutely perfect.

We'll see how it comes out. RJ
Old Sep 19, 2006, 03:29 PM
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The point of having an EPP plane is bouncibility without serious permanent damage. If you're going to put a hard leading edge on it--go composite!!!
IMHO
Timmig
Old Sep 19, 2006, 03:30 PM
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Quote:
Originally Posted by THUREN
Should work great, but IMO, goes a "little" beyond the point of building a foamy.

I was thinking this same thing on my last build. I hate where the top and bottom tape layers meet. You can't get a SUPER clean line there so my idea next time is this...

Use a TON of thinned goop on the LE, tape the wing normally, and then where the tape meets at the LE run a bead of goop over it and smooth it down as clean as possible. Now put a piece of the 3" wide thin cheap masking tape to smooth it down till it tacks up.... Once it's mostly dry smooth it down with a rag soaked in Toluene...

Should be a bomb-proof, but pliable LE when need be...

Just an idea...

-Don
The reason I am going down this path is I am lazy at heart. I am trying to get the best result with the least amount of work. I've had my fun with thinned goop and stinking up the house. I think this would make a very clean LE with very little effort. Off to the LHS for a gander at the basswood supply.
Old Sep 19, 2006, 03:32 PM
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Quote:
Originally Posted by timmig
The point of having an EPP plane is bouncibility without serious permanent damage. If you're going to put a hard leading edge on it--go composite!!!
IMHO
Timmig
Ok, scatch that last post. Off to Fibreglass supply for some 6 oz carbon. Don't know how well it will stick to EPP though.
Old Sep 19, 2006, 03:42 PM
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Well it appears you want composite performance, and now are going to pay the composite price if you hit something. Why not just make the change and get the performance you seek?
T
Old Sep 19, 2006, 03:56 PM
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If you're thinking about laying up carbon on the leading edge, you should spackle it first otherwise the foam will drink epoxy.

Adrian
Old Sep 19, 2006, 04:01 PM
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Quote:
Originally Posted by gorgeflyer
I think this would make a very clean LE with very little effort.
I guess it would be fairly easy if you can find the perfect piece of Bass...

If not, I don't know that shaping a Bass LE would be considered easy..
Old Sep 19, 2006, 04:02 PM
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Quote:
Originally Posted by gorgeflyer
I've had my fun with thinned goop and stinking up the house.
In the house????

I do it outside....
Old Sep 19, 2006, 04:17 PM
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[QUOTE=THUREN]I guess it would be fairly easy if you can find the perfect piece of Bass...

QUOTE]
I'm always on the lookout for the perfect piece of Bass!
I will most likely use Goop to attach this. That will give me good grip and still allow the foam to flex a little bit. I do use PU to hold the spars in though.
Old Sep 19, 2006, 10:22 PM
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Pictures?


We would like to see how you do this leading edge.

Tom
Old Sep 19, 2006, 11:21 PM
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my buddy ron used a carbon rod on the LE of his crossover. i did the normal tape thing and his crossover kicks mines butt! it is faster has a cool sound and all around flies better!
mine is bounce'able though!!
it is a cool mod,sometimes i kinda wish i had done it too,but not when i smack it!

marty
Old Sep 20, 2006, 01:01 AM
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Isn't that how TFLG does it with his cheap foam cutter? When he overhangs the templates at the LE and TE doesn't he have to rebuild the missing area with wood/whatever?

Boz

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