25.531—Hull and main float takeoff condition.
For the wing and its attachment to the hull or main float—
(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.