§ 25.531. Hull and main float takeoff condition.
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/us/cfr/t14/s§ 25.531·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
For the wing and its attachment to the hull or main float—
(a)The aerodynamic wing lift is assumed to be zero; and
(b)A downward inertia load, corresponding to a load factor computed from the following formula, must be applied: where— n = inertia load factor; CTO = empirical seaplane operations factor equal to 0.004; VS1 = seaplane stalling speed (knots) at the design takeoff weight with the flaps extended in the appropriate takeoff position; β = angle of dead rise at the main step (degrees); and W = design water takeoff weight in pounds. [Doc. No. 5066, 29 FR 18291, Dec. 24, 1964, as amended by Amdt. 25-23, 35 FR 5673, Apr. 8, 1970]