From: "Jim Selikoff" <jselikof@...>
Date: Tuesday, October 8, 2002 9:19 AM
Subject: Re: FG tail surfaces?
Date: Tuesday, October 8, 2002 9:19 AM
Subject: Re: FG tail surfaces?
I made some wing tiplets for a Zagi using 3/4 oz cloth over balsa.
For flat things, it's easy enough to weight with books, I just put
saran wrap between the layup and the books. Note that whatever
texture is in the book cover will transfer, so pick something
smooth. Might try some mylar instead.
Be sure to get as much excess resin off as you can to avoid weight.
I used Zpoxy finishing resin with good results. You should be able
to go at least 1/32" thinner on the balsa with this sandwich
approach. I'm certain it will be heavier, though, than lightweight
covering over the thicker balsa, but it will be much stronger.
--- In BugHLG@y..., "Dan" <danstrider@a...> wrote:
> I'm curious about creating really light and stong tail feathers.
>
> I have looked at Dr. Drela's Apogee tail surfaces, but I'm looking
> for something a modeler without access to a vacuum bagger or CNC
> molding equipment could build. I'm also shying away from foam due
> to an accute shortage of foam cutting equipment here.
>
> I expiromented with using .75 oz FG and CyA with mixed results.
My
> surfaces warped, presumably due to the moisture in the glue. With
> one layer on each side, however, I do get strong pieces.
>
> Is there any way I can sheet 1/16" balsa feathers with fiberglass
to
> get more accurate and rigid surfaces? I'm curious, must I go to
vac
> bagging to get straight and light tail feathers? If so, what
resins
> work well for this application? Is there any furture with my FG
and
> CyA approach?
>
> Thanks again,
> Dan