Lew Hartswick wrote:
Shawn wrote:

Some claim UV light can penetrate a fiberglass top and that the
accumulated irradiation of the glider will cause damage to the ship.
Shawn

Have any of "some" ever done a transmission spectra of the material?
Fat chance. Even window glass cuts of about 400 nm.

Not that I've heard. UV measurement inside trailers has been discussed
here before too.
Why bother if after nearly forty years of glass ships in glass trailers
hasn't shown obvious damage. Lots of crazed finishes in old gliders in
metal trailers too.

Shawn