Welcome to the Forum Ronnie. The bilge under your cockpit sole appears to be very shallow, and I doubt that you would get a bilge pump in there....
@Slimes have you calculated the buoyancy available in the hulls at the estimated load waterline - and have you also tallied up a weight estimate...
Do you mean the rate of increase (or decrease) of corrosion when using corten steel instead of mild steel? Are you considering using corten steel...
I don't think that surface piercing propellers are going to be terribly efficient when running at slow speed, even if you install propellers with...
Your powercat is very impressive! Could you post some more details and photos of her please? Is she your design? I also like very much the video...
Re your proposed plan view drawing - here is a rather left field suggestion, but how about building it as a catamaran, with simple glass sheathed...
The type of craft shown in your photos is called a SWATH - I think it would be rather difficult to scale down the SWATH shown to an overall length...
It will take time to go through the entire thread, but @oldmulti has provided a very useful index near the beginning, and you can perhaps look...
@Scopic are you designing this vessel yourself, perhaps using a larger wind turbine crew transfer vessel (CTV) as a basis? If so, do you have any...
Is this a private (ie no government involvement) venture? She does look very fine. Where will she be operating - I presume in the Halifax area?...
For a first entry in the design spiral, if we assume a rough block coefficient of say 0.6, then the displacement at 1 metre draft would be :...
Was the $50k spent on hiring other vessels to transport building materials and equipment for yourselves? Re how the 10.4 metre barge is not big...
SMJ does look very fine indeed! Would you like to start a new thread on this forum and tell us a bit more about her please, including some more...
@oldmulti re your post above, I am reminded (in a way) of the power cat in the photos below which has been under construction here for the past 20...
I designed the 15 metre ally cat in my avatar photo, but this was very simple in comparison to a complex beast like the De Villiers Nahoa 55,...
You could maybe try asking Mr De Villiers if he would just sell you the cutting files for the aluminium components, rather than the complete design?
If you are happy with the prospect of building the boat yourself, Richard Woods has plans available for various small trimarans under 20' long -...
I think you mean this Nahoa 55 - 17m Aluminium Expedition Catamaran Nahoa - Design #242 - De Villiers Marine Design...
Welcome to the Forum Rico. I will add +1 to the request by clmanges above for further information from yourself about the 15 metre aluminium...
This book by John Teale is also an excellent introduction to boat design -...