United States. Navy Department. Bureau of Construction and Repair · Washington, Govt. print. off. · leaf 415
AIRCRAFT DESIGN DATA. 139 JJote 12. 3p/y t>/rc/7 '//z /hc/r 1 veneer J 7p/y pop/ar hz inch veneer '^Nos. /,2.-3, Gra/n of face A/os. 6^ Cra/n efface p//'es f7or/z.onta/ p//es verf/ca/ Fig. 75. — Engine bearers, all-veneer type. Cross-fafeheef porf/on /ncA/cafes Sprace f///er … Fig. 76. — Engine bearers, spruce-filler type. It is to be noted that the spruce-filler type was somewhat superior to the other in thrust loading and much superior in vertical loading; also that the bearers of the former type with the face grain of the plywood vertical were superior to those with…
Airplanes · Airships · Aerodynamics
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