Hi, does anybody know how to calculate acrylic or polycarbonate molded canopy thickness based on it's area for pressurized tandem 2 seat airplane? Pressure difference is 5psi. I'm not sure if canopy can be made from 1 piece or separate for pilot in front seat and 2nd. pilot in back seat. I understand that you can seal connection point of canopy and aircraft body with inflatable rubber seal so you can pump air inside canopy without leak, but haven't found any information in books or internet about calculating canopy area and thickness. Thanks in advance.