Quote:
Originally Posted by cooper  and that is the whole point...If all things being equal and size for size, acrylic and polc are the same strength then given equal fastenings, the elongation absorbs energy and creates a much safer material. If the force causes deflection, then a rigid material will fail. |
Sorry, but you clearly do not understand. You should also take on board that your claim that if a rigid material deflects it will fail is totally wrong.
I have mentioned the problems in earlier posts and will be just tiresome for me to prolong the agony. I suggest you reread them and also ask yourself why if Lexan is so effective and "strong" it is not widely used for windows and hatches (in fact I have never seen it used for windows, as opposed to portlights, in anything other than an amateur built boat) not only in boats but also in other applications such as aircraft.
As I have said, in most countries people can use whatever they wish for non coded/class vessels. You are welcome to do so for your own vessel if you are not convinced so go to it.