Aeroplane construction and operation; including notes on aeroplane design and aerodynamic calculation, materials, etc. A comprehensive illustrated manual of instruction for aeroplane constructors, aviators, aero-mechanics, flight officers and students. Adapted either for schools or home study (1918)
Rathbun, John B · Chicago : Stanton and Van Vliet Co. · leaf 226
grams if the best weight efficiency is to beobtained. A number of different wing spar sections are shownby Figs. 9, 10, 11. Spar (A) in Fig. 9 is the solid onepiece *T type (generally spruce), channeled out alongthe sides to remove the inefficient material at the center.The load in this case is… … C B A Fig. 9. Types of Wing Spars. (A) Is the I Beam Type. CB) Box Spar.(C) Is Composite Wood and Steel, Wrapped with Tape. weight of material located top and bottom will producemany times the results obtained with material locatedalong the center line. At points of connection, or wherebolts pass…
Airplanes
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