REFLECTOR: Filler for wingtips

[KeithHallsten]

Richard,

Thanks, I was also considering using some pieces of foam sheet, stuck
together and to the inside of the pre-molded fiberglass wing tips with
epoxy/micro slurry.  Although I think you were talking about making a
wingtip out of solid foam and glassing it, your post was still useful.

Keith


----- Original Message ----- 
From: <richard at riley.net>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Tuesday, June 29, 2004 7:38 PM
Subject: Re: REFLECTOR: Filler for wingtips


> At 07:21 PM 6/29/04, you wrote:
> >What is everyone using to fill canard tips, winglet tips, and lower
winglets
> >these days?  I went by my local West Marine this morning to pick up a
little
> >kit of polyurethane pour foam, and the only size they had cost 85 bucks!
> >After re-inserting my eyes in their sockets, I noticed that this kit
would
> >produce 2 cubic feet of foam, which is a lot more than I will need.  At
that
> >price, I could just whomp up a dry batch of Alphaepoxy/microballoon and
use
> >that!
> >
> >How about the pressurized cans of foam sealant at Home Depot?  The
resilient
> >latex type probably isn't what we're looking for, but they may still have
> >the "semi-rigid polyurethane" type.  Any other good ideas?
>
> The one part foam will never completely cure.  If you get a good hot day
on
> the ramp, it will swell underneath your expensive paint job and end up
> looking like a goiter.  Some of the 2 part foams will do the same thing.
>
> I always used blue foam, gued to the tip with epoxy/micro slurry.  Rough
> cut on a band saw first, wipe with slurry, put in place, hold it there
with
> drywall screws till it cures.  Remove screws, sand to shape, cover with 2
> plies of glass.  Fill with micro, sand, prime, paint.
>
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