[hpv-boats] Wetted Surface Area

[Ian Cassell]

Rick
        Have been thinking about what you said about
wetted surface area. I did some sums based on a
canoe shaped hull wth flat bottom 5m long and with
a load of 100kg.
I worked out the wetted surface areas for different beams
from 200mm up to 400mm.
Beam  200mm WSA  2.14m2  Draft 145mm
Beam  250mm WSA  2.02m2  Draft 116mm
Beam  300mm  WSA  2.00m2  Draft 97mm
Beam  350mm  WSA  2.00m2  Draft 80mm
Beam  400mm  WSA  2.10m2  Draft 72mm
>From this the 350mm hull might be the best as it
has the lowest draft to WSA. Shows that the narrower
you go does not always give you the fastest hull.

Ian