Re: Resistance calculation

[lebar]

Fn=V/(G*L)^0.5
L is 7.5 m
V is to determine
G is 9.1
How is defined Fn when you don’t know V ?

In the case of the trimaran is the formula applicable?
The botton hull shape of the main hull is broadly similar to my rib’s hull (zodiac PRO 5.5m) but more narrow so it “looks” longer in term of “finesse” (? in english). So according to what I understand this hull should be faster than my RIB (30 kts with a 6OHP when planning)…6 kts is quite few
good night