RE: Your hull type
"Hull speed" and the rules for hull speed only relate to common boats with a length to beam ratio of 3-1 or so.
Once one gets to at least 6-1 or better 8-1 the boat may stay in displacement mode and yer high speeds are available.
Look at most of the commuters of the 20's , unfortuniatly heavy from their construction and the monster engines of their time , but well over 20K.
Cats and trimirans can use these shinny hulls IF they are operated at high speeds.
At low trawler crawler speeds the cats are less efficient than a similar weight 3-1 boat due to much increased wetted surface.
And of course the wide spaced hulls give the GB floating box snap roll in beam conditions.
|