How To Build A Sailing Boat #1 - My Catamaran Hull Design Explained - Ep03

Here’s a short explainer on sailing catamaran hull design and the theory behind our own hulls.

We have a quite distinctive and unusual design for a high performance cruising catamaran, and Laurence does his best here to guide you through the thinking behind them.

This is definitely one for anyone who's ever wondered how to start designing and building your own boat.

Timecode
0:00 Intro with stills
0:16 Choosing a designer
1:02 Deciding on hull length
2:18 Low aspect keels or daggerboards?
3:29 Narrow waterlines
4:51 Theory of wave drag
5:11 Hull displacement vs slim fast hulls
6:13 The advantages of a double-ended hull
8:13 Using a chine for accommodation
9:54 Summary of hull design

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[marcellschmitt]

This was one of the best explanation about hull designs I’ve ever listened too. Excellent

[earthstick]

I can't wait for the next installment.

[andrewcarr]

I have an idea that will get millions of views. Lawrence once gave me the single best description of speed against height when sailing upwind that I have ever heard, he even drew a graph, I have tried to recount it to hundreds of people since he told it to me but a video I could direct them too would be amazing. I suspect it would be of interest to almost all fast boat sailors! I don’t remember the finer details but do remember that the difference between 55° and 60° was shockingly significant. Helped me do well in a lot of races on a lot of boats! 🙏

[johnmorgenthaler]

Very impressive boat! I would love to see more about the mast and the rigging in future updates. And some sailing too! Thanks

[guyvessieres]

Respect to your original and efficient conception and réalisation. Well explain. I think that you have a lot of pleisure with it. Thé help of your neighbourgs is very warm. Bravo 👍👍👍.
Un petit bonjour de Lyon.

[metalextras]

You are not a naval architect but prolly a brilliant salesman or a lecturer! I am Sold!

[Cheers_Warren]

Nice choice of hull lines designer !
Yup limited load carrying but speed too! Love it ! Cheers Warren

[brianglaze]

I'm echoing the previous comment. Fantatsic description of the advantages and purpose of the design. Thank you for sharing.

[rows]

Superb explanation as to your thought processes & simple to understand, congratulations!
You’ve created what appears to be a functional and attractive boat & I look forward to seeing footage of her underway - will definitely be following along for future updates.

[KoalityofLife]

Thanks for the information on hull design. :)

[AORD]

Great information. Great to hear the logic for the shape. The boat hulls look sleak and fast with brilliant shallow draft.

[RF-yhqh]

I wanna build mine!! please post more details how you build the mast!

[nipon]

Beautifull boat! The hull design and the general boat structure make ne think a lot of the Dazcat.

[martinnovation]

Beautiful hull shape.The integrated rudders and the tapered stern - awesome

[VARUNKUMAR-sjjg]

Excellent video, Thank you sir. Btw I'm a Mechanical Engineer from TN, India

[svlguitar]

Brilliant film again you guys, you explain things so very well, maybe a tv channel should do a feature on you both and your experience of building your own Cat, great work, miss you guys, Xxx Simon

[detroit]

Such a beautiful boat. 3:43. On a say 35 ft average catamaran, can the 2 hulls be separated, broken? By the ocean (in general) I know the Ocean is powerful enough to wreck it. But. Say it flips several times in an intense storm, can it just break apart and separate?

[markrabone]

Lawerence I love your boat design - I’m considering building one myself- or if you ever consider selling yours please let me know… have you documented your plans?

[gastongonnet]

Great explanation!! Thanks for sharing!!

[humanitynow]

Question please, what is the average or the maximum size of the hull wide for the 40 ft performance catamaran??? Thank you very much for the informative video