[voyager_663rd]

I'm joint a wing tip section (about a foot long) to a center wing section (specifically, corsair wing--it builds in three sections).

I want to use some fibreglass to reinforce the leading/trailing edges of the two sections where they join for some added strength. I'm only talking about an inch square piece of 'glass in an L-shape (a corner that butts unto a rib/leading edge and rib/trailing edge).

1)I'm using .75oz fibreglass. should this be heavier duty or is it ok?
2)use what: epoxy?medium CA? fast/instant CA?

Thanks.
Len

[Concordefan]

Hi Len,

In your situation i would sheet both outer wing joints starting from leading edge to trailling edges, this will give you some structure strength, then i would wrap whole wing joint sections with fiberglass cloth as you would do to reinforce wing center joint. .75 oz glassing should be ok for securing and strengthning wing joints, but it all depends on size of the plane too.

Personally speaking i wont just apply fiberglass only to leading and trailling edge!...but thats just me...


Cheers,
Sammy

[Ken Currell]

Hi

It's hard to tell the length of the joint you are making but I would guess it to be at least a 60 size aircraft.

If that is the case I don't think that 3/4 oz cloth really adds enough strength on a larger plane.

I would use 1&1/2 or 2 oz. cloth with a close weave.

Ployester resin would likely be the strongest as it is quite hard and resists compression loads as well as tension loading but it is also heavy.

You could tack the cloth in place with CA so it doesn't move when you apply the resin or whatever you want to use on the fiberglass cloth.

Cheers

[voyager_663rd]

Yes, it is a 60.

The area will be sheeted top and bottom regardless in that area. The l.e. and t.e. edge is just 1/4"x1/2"balsa stock. They are "z-shaped" joined together and I thought the question I asked was just to add some additional insurance to that particular area.

I guess what I'm forgetting is that that join is just one part of overall structural integrity and by itself is probably insignificant.

The area involved (that I was going to glass for additional strength) is probably only about 1 sq inch. Not enough to do anything in the overall scheme of things.

The sheeting (when applied) will do more for holding the whole wing area together than anything else. I guess my intentions were good but I'm probably just "over-building".

Thanks for the ideas. I probably won't bother.

Len

[Ken Currell]

Hi

If the area is flat or almost flat just get a piece of carbon fiber sheet and glue it on.

cheers

[2thelmt]

Len,
If the plans don't call for it, then I wouldn't bother. Will add weight, and extra effort on your part. Your surface's will have to be sanded to get a good finish which will add more time to the build IMHO.

[Ken Currell]

Hi guys

I just re-read the post

He is talking about a 1 inch square area.

If it isn't on the area to be painted or covered it shouldn't be a problem as it won't add enough weight to worry about.

Otherwise I agree with Len.

Cheers

[voyager_663rd]

Yes folks, it's not worth the effort. I've epoxied the right wing panel to the center wing section without adding that small piece of 'glass. The area in question is only about 1 sq in and I have concluded that to glass that joint

is overkill.

I'm not going to bother as the sheeting (when added) will provide more than enough strength to the entire area.

Thanks again though.

Len