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:
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.