where-
Pk = pressure (p.s.i.) at the keel;
C2 = 0.00213;
K2 = hull station weighing factor, in accordance with figure 2 of appendix B;
VS1 = seaplane stalling speed (Knots) at the design water takeoff weight with flaps extended in the appropriate takeoff position; and
[BETA]K = angle of dead rise at keel, in accordance with figure 1 of appendix B.
where-
Pch = pressure (p.s.i.) at the chine;
C3 = 0.0016;
K2 = hull station weighing factor, in accordance with figure 2 of appendix B;
VS1 = seaplane stalling speed at the design water takeoff weight with flaps extended in the appropriate takeoff position; and
[BETA] = angle of dead rise at appropriate station.
The area over which these pressures are applied must simulate pressures occurring during high localized impacts on the hull or float, but need not extend over an area that would induce critical stresses in the frames or in the overall structure.
where-
P = pressure (p.s.i.);
C4 = 0.078 C1 (with C1 computed under § 25.527 ) ;
K2 = hull station weighing factor, determined in accordance with figure 2 of appendix B;
VS0 = seaplane stalling speed (Knots) with landing flaps extended in the appropriate position and with no slipstream effect; and
VS0 = seaplane stalling speed with landing flaps extended in the appropriate position and with no slipstream effect; and [BETA] = angle of dead rise at appropriate station.
These pressures are uniform and must be applied simultaneously over the entire hull or main float bottom. The loads obtained must be carried into the sidewall structure of the hull proper, but need not be transmitted in a fore and aft direction as shear and bending loads.
14 C.F.R. §25.533