On 2/10/2011 9:33 AM, brianDG303 wrote:

Well, this is off-topic but.........
When testing plastics for UV transmission and comparing acrylic, lexan
(polycarbonate), and the fancy expensive plastics sold to prevent UV
damage to art and objects the acrylic varies quite a bit from as good
as the others to poor, the Lexan is very good. Most newer gliders
have canopies that reject UV enough to make it a non-issue, but if you
are concerned about UV this might be a factor in your choice of
materials.

For winter flying, the UV is so low because of the sun angle, I don't
think it should be a concern. Summer flying - different story.

The advantage of polycarbonate is it's easier to work with than acrylic,
and far less likely to crack when bent for installation or in use.
Acrylic is better optically, and it's what I use for the front, flat
panel. If I could find acrylic thinner than the 0.060" stuff available
locally, I'd probably make the big panel out of it, too.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to
email me)