C-ROUCH Konstanta za: (što brži brod veća konstanta, 150 - 230)
150 - average runabouts, cruisers, passenger vessels
190 - high speed runabouts, very light high-speed cruisers
210 - race boat types
220 - three-point hydroplanes, stepped hydroplanes
230 - racing power catamarans and sea sleds
Ili za vaš postojeći brod:
C = Vk * SQRT(DISP/SHP)
Vk = Speed in knots - Brzina u čvorovima km/h / 1,85
C = Constant based on the type of vessel - C konstanta
Disp = Displacements in pounds - Ukupna težina plovila u funtama kg / 0,454
SHP = Shaft Horsepower - Snaga na propeleru kw ili hp ???