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Note: The polycarbonate forming techniques used is dependant on the complexity of the windshield shape. More complex windshield/canopy shapes would require pressure forming while simpler shapes would require vacuum forming.
Source: https://advancedplastiform.com/materials/polycarbonate/
Types of Windshield Designs/Shapes
Cockpit (Vacuum Forming)
Backfin (Pressure Forming for back windshield due to sharp edge)
Bullet (Vacuum Forming )