Wing Planform Geometry Effects on Large Subsonic Military Transport Airplanes.
Final technical rept. Mar 76-Feb 77,
BOEING COMMERCIAL AIRPLANE CO SEATTLE WASH
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A Preliminary Design Study of large turbulent flow military transport aircraft has been made. The study airplanes were designed to carry a heavy payload 350,000 lb for a long range 10,000 nmi. The study tasks included Wing geometrycruise speed optimization of a large cantilever wing military transport airplane Preliminary design and performance evaluation of a strut-braced wing transport airplane and Structural analyses of large-span cantilever and strut-braced wings of graphiteepoxy sandwich construction 1985 technology. The best cantilever wing planform for minimum takeoff gross weight, and minimum fuel requirements, as determined using statistical weight evaluations, has a high aspect ratio, low sweep, low thicknesschord ratio, and a cruise Mach number of 0.76. A near optimum wing planform with greater speed capability M 0.78 has an aspect ratio 12, quarter chord sweep 20 deg, and thicknesschord ratio of 0.140.08 inboardoutboard.
- Transport Aircraft