. Annual report of the Board of Regents of the Smithsonian Institution . Fig. 1.—Farman FiQ. 2.—June Bug Aeroplane, Hammondsport, N. Experiment Association. MILITARY AERONAUTICS SQUIER. 139 Table 1.—Computed power required to tow a plane 1 foot square xvcighing 1pound JiorizontaUy through the air at various speeds and angles of flight. Velocity (miles per hour). Angle flight. Computed resistance. Tow-linepower. Lift pertow-line Drift. Friction. Total. horse-power. 30

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. Annual report of the Board of Regents of the Smithsonian Institution . Fig. 1.—Farman FiQ. 2.—June Bug Aeroplane, Hammondsport, N. Experiment Association. MILITARY AERONAUTICS SQUIER. 139 Table 1.—Computed power required to tow a plane 1 foot square xvcighing 1pound JiorizontaUy through the air at various speeds and angles of flight. Velocity (miles per hour). Angle flight. Computed resistance. Tow-linepower. Lift pertow-line Drift. Friction. Total. horse-power. 30 Ft. lb. 3,5 40 45 50 60 70 . 80 90 100 Column two, giving values of a for various speeds, is computedfrom equation (1). Thus, at 30 miles per hour, W sma: 2koAW 2 - 2 X .004 X 1 X 30^ whence a = °. Column three is computed from the term W tan a in equation (3),thus: Drift = W

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