FlapsAndSlats From United States of America, joined Jan 2008, 2 posts, RR: 0 Posted (5 years 10 months 2 weeks 5 hours ago) and read 3143 times:
I'd like to know if this piece of glass a friend brought me could have been on the navigation lighting system of an airliner. It's clear and about 1" thick. It's just a broken piece but has the right curves and all indicating that the total part could be the right size. Are these glasses really that thick? I thought these would always be polycarbonate!
411A From United States of America, joined Nov 2001, 1826 posts, RR: 9 Reply 9, posted (5 years 10 months 3 days 1 hour ago) and read 2559 times:
Quoting 474218 (Reply 6): Windshields are made of acrylic plastic with a thin (0.050 to 0.080 inch) glass over lay on the outer surface.
While this is true of new(er) aircraft, older aircraft, the Boeing 707 specifically, used several layers of glass and acrylic 'sandwich' with glass on both outer layers.
This was called NESA, and was also used on piston engine and many older turbopropeller types as well.