If I ever have the misfortune of being upside down in an RV crash, I would prefer to have it shatter on impact. Imagine trying to break a bulletproof material with a hammer while your cockpit is on fire.
Might be okay for the forward screen to mitigate bird strikes, but not the entire canopy.
Don
A lexan canopy would look like you car headlights within a few years. Yuck. The optics wouldn't be as good as plexi either.
Correct me if I am wrong, but it appears the Van's canopy's only come in acrylic. Not the strongest stuff by any means. Is there a source for Polycarb -7 canopy's?