Jul 17 2010
PPG Industries’ (NYSE:PPG) aerospace transparencies group has been awarded a contract by Bombardier Learjet to design and manufacture heated glass windshields and side cockpit windows for the Learjet 85 aircraft.
The contract calls for PPG to supply original-equipment flight-deck windows and aftermarket parts to Bombardier Learjet for operators of the Learjet 85 business jet, according to Arthur Scott, PPG Aerospace global director for general aviation transparencies.
“Bombardier Learjet wanted glass windshields and cockpit windows for the Learjet 85 aircraft, and PPG was selected because of our expertise and history designing and producing sophisticated glass transparencies,” Scott said. “They will use our latest sealant and interlayer technology for extended service life.”
The four windows will wrap around the cockpit to enhance visibility and aerodynamics, with the large windshields formed into complex, compound shapes, according to Scott. Three plies of Herculite(R) II chemically strengthened glass will afford strong, lightweight transparencies. The windshields will be designed to resist impact by a 4-pound bird at 300 knots.
Rain-repellent Surface Seal(R) coating on the windshields will maintain visibility in rain conditions, enabling Bombardier Learjet to eliminate windshield wipers on the aircraft to save weight and reduce aerodynamic drag.
New PR-1425CF chromate-free sealant by PPG used as the outboard moisture seal will provide ultraviolet and weather exposure resistance in an environmentally responsible formulation. Proprietary new PR-2060 sealant used as an internal moisture seal will provide an additional barrier to further reduce moisture ingress and extend service life, according to Scott. Highly resistant to moisture damage, S-123 urethane by PPG will be used as the interlayers to bond the glass substrates, affording more elasticity than vinyl to eliminate cold chipping and defend against delamination.
Scott said PPG is designing and will produce the windshields and side cockpit windows for the Learjet 85 aircraft at its Huntsville aircraft transparencies facility with deliveries expected to begin the first quarter 2011 to Bombardier Learjet’s Wichita, Kan., facility.
Launched on Oct. 30, 2007, the new Learjet 85 aircraft will be the first Bombardier Aerospace jet and first business jet designed for type certification under U.S. Federal Aviation Administration FAR Part 25 to use composite materials for all external primary structures.