23.531—Hull and main float takeoff condition.

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.

Code of Federal Regulations

[Doc. No. 26269, 58 FR 42161, Aug. 6, 1993]