Willy VINKEN wrote:
...
I don't believe in reflection-related damage. The sun would have to
be too low on the horizon for this to be possible with open canopies
and due to the see-through qualities of plexiglass, at best only a
very small part of the energy would be reflected.
...


I just tested it a few days ago with the ASH25 of a couple of friends.
It was waiting for launch in the tow line, the rear canopy was open and
the sun clearly was being reflected and focused on the head rest. I put
my hand at this place in order to feel how hot it was and had to withdraw
it after after a few seconds. And in this season the sun in not already
at its maximum bright.