modern classic 37'

GeoffD

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Joined
Aug 14, 2026
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Location
Antwerp
Hi everyone,

My name is Geoffrey and I live in Antwerp, Belgium, quite close to what I consider one of the most beautiful harbours in Belgium: the Willemdok. :)

For quite a while I have been playing around with the idea of designing and eventually building my own boat. Until recently it was mostly just sketching and experimenting, but I have now reached a direction that I like enough to seriously investigate whether I could actually build it.

My main profession is carpentry, and I also have extensive experience with CAD, AutoCAD and 3D modelling. However, I have no previous experience with boatbuilding or naval architecture, so I am very aware that there is a lot I still need to learn. That is actually one of the main reasons I joined this forum.

For the styling of the boat I started from what, in my opinion, are two of the most beautiful wooden boats/yachts ever made: the Spirit Yachts and the Riva Aquarama.

I experimented quite a bit with AI-generated concept images to combine some of the characteristics I like from both. Obviously these are only concept images and not engineering drawings, but they helped me establish the proportions and overall character that I would like to pursue.

The current concept is approximately:

11,4 m x 2,8 m
wooden construction
Primarily intended as a weekender, with perhaps one or two longer trips each year
For cruising around Antwerp and nearby waterways, my initial idea was to use electric propulsion, combined with a relatively small diesel generator as a range extender. The intention would be to do most shorter trips electrically while still having enough range and independence for longer journeys.

More recently I started thinking about adding a mast as well, which has slowly pushed the concept towards something closer to a motorsailer.

I realise that adding a mast changes the project considerably. It introduces a lot of new questions and practical problems.

I am absolutely not under the illusion that an AI render or a nice CAD model makes a seaworthy boat. My intention is to gradually turn the concept into a proper design, learn the required calculations and construction methods, and involve a naval architect or experienced designer where necessary.

Please feel free to be critical. I would much rather discover a bad idea now then after hundreds hours of drawing :)

I will add some of my current concept renders below so you can see the direction I am aiming for.

Thanks in advance!

Geoffrey
 

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I feel that electric is a poor option for a motor sailer because you won't be able to operate it unless the diesel is running. A 40' motor sailer would need a 40hp diesel. You just don't have independent charging options for that sort of draw unless an engine is used, and if that engine is going to be running when the boat is underway, it may as well be used to run the boat.

However, if we consider a vessel designed as a pure sail boat with good upwind performance; an electric outboard could be used as auxiliary propulsion for marina operations etc, and also to power a tender dinghy; and you would rarely need to start an engine as wind/solar would cover usage.
 
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