Twin Tip Kitesurfing Hydrofoil Dream

by James Crook in Portsmouth, Hampshire, England

For the continued development of the low cost low profile hydrofoil concept for twin tip kiteboards

by James Crook in Portsmouth, Hampshire, England

We did it
On 25th August 2017 we successfully raised £700 with 21 supporters in 28 days

The Project

Currently under development, you can follow our progress on the hydrofoil dream on our website  We model and analyse the design on CAD and 3D print out each iteration to test out on the water.   How many iterations do we have left?  How long is a piece of string?  We learn something new each design and want to start involving others more in our journey!

We first showed it to the public at the Virgin Kitesurfing Armada this year, and were thrilled with the interest people were taking in it!

The Crowdfunding bit

The continued development of the hydrofoil design for twin tip kiteboards.  Current hydrofoil designs are expensive and need deep water with their long mast.

What if we can create a hydrofoil that attaches to the fin mounting points on twin tip kiteboards?  We can create a hybrid between current twin tip kiteboards and full hydrofoil designs.  Our design would have these benefits:

Low cost
Attaching to your existing twin tip kiteboard means you do not need to fork out for another board.  Our goal is also to design it so we can use more convential materials, and not more expensive ones like carbon fibre.

Use in shallow water
We are specifically designing ours with shallow water in mind, idea when you need an extra boost in light winds and want to stay in lagoons.

Easier to learn
As it will be an extension to the twin tip board, we expect the transition to our design to be quicker.

Easy add-on for transport
Because it replaces your fins on your existing twin tip board, you only need to take the fins, and not an extra board to cope with the lighter winds - great option for holidays!

By constraining the size to the fin mounting points and keeping it closer to the board, we hope our design is inherintly safer.

My Story

Creating from a young age

I've always been curious about how things work and creating things has always been a passion since my first lego kit I was given as a child, even though back then I needed my dad's help to make it. I've always liked to explore my creative side but more often my curiosity brought the technical side to the fore, the end result was 13 years as a Mechanical Engineer.

I always felt myself fortunate in my job, there was a lot of freedom to explore different avenues, I would never be pigeon holed into one particular area. This gave me a range of skills, from design through to the analytical. When my company moved the operations to the US and leaving myself redundant, I was left asking: How can I best make use of these skills to do something for myself? I wasn't quite ready to go straight back into corporate life and I had a unique opportunity to find my own path.

A new path

It was a discussion with the local shop that sparked my interest in the hydrofoil design, when the shop owner mentioned about the hydrofoil market and how it was growing. This gives me the perfect outlet. I've been kitesurfing for 5 years and love it, to work in this field would be a fantastic opportunity. A lot of products and innovation these days require electronics and software, and apart from the odd html knowledge, I can change the font and insert a paragraph, these aren't skills I possess. Neither, I should add, is actually manually creating things. I know what I want to achieve but the signal going from my brain to my hands seems to get rather distorted. With modern day computing and the latest 3d printer technologies, I can overcome these limitations!

I've found it exciting to see how the project evolves and the interest in generates. How will the project look on final completion? Certainly it is not what I thought it would look like when I started, when I first discovered that you can put a carbon fibre skin on a 3D print and the material cost was relatively low. That the process took a couple of days and that carbon fibre wasn't the friendliest of materials to work with quickly put me off that design. I did look at the more conventional carbon fibre process, in theory it is quite simple. Create the part, okay. Create the mould, sounds simple enough. Get some prepreg material, okay again. Get an oven, vacuum bag and compressor, now this is starting to turn into a production line and not something I'm quite prepared, or my girlfriend is prepared to allow me, to turn my conservatory in to!

The analysis is only as good as the inputs you give it

I can run simulations to calculate the lift and the stresses the foil will go under during ideal conditions, but the foil will almost never be under these conditions, as the water gets choppy and the riders undoubtedly puts the board at various angles never imagined, not to mention the heights they can float (fall?) from. A phrase I often find myself using after designing something, “why on earth would you use it like that?” Though I'm probably thankfully for humankind that not everyone's brain is wired the same as mine!

With each iteration of the design, I can see it evolving, I can see challenges and I can see how to overcome them for the next design and I apply for design protection on each one. I sometimes wish the next design would be the final one, but when it is not, I reflect and think that when I do get to a working solution, which I will, then it it just makes it that little bit more satisfactory to look back on the journey I took, and I love to see the interest people take in it.

For kitesurfers, those who love innovation and the sea!

I love sharing my story and I really enjoy people taking an interest and being involved, so if you have read this and find yourself intrigued, please look me up.

James Crook
Founder and Managing Director of Forty1 Kitesurfing


This project offers rewards in return for your donation.

£5 or more

£5 Reward

Just for the dream!

£10 or more

£10 Reward

Just for the dream!

£10 or more

3 of 7 claimed

£10 Reward

One of our beautiful fridge magnets by way of thanks

£20 or more

£20 Reward

We'll 3D print out our logo for you

£20 or more

£20 Reward

20% all clothing at our store until the end of 2017

£20 or more

£20 Reward

25% discount on all accessories until the end of 2017:

£20 or more

0 of 10 claimed

£20 Reward

£49 off Cold West Boards SUPs, usually on sale for £399, you get them for £350:

£30 or more

£30 Reward

Choose any shirt design on our teemill clothing site and we will add a personalised message of thanks to you:

£40 or more

£40 Reward

25% off all items on our store until the end of 2017:

£50 or more

£50 Reward

Become part of the testing experience, when we get prototypes ready to use, you can try them, or try some of our previous models!

£100 or more

£100 Reward

Get exclusive updates as to where we will be testing and become part of the experience. This includes testing of current and previous designs as well. Remember, we are Portsmouth based. Plus get 25% off all our products at our online store until July 2018.

£100 or more

£100 Reward

Send us your favourite water based photo and we will create a design in our own unique style for a t-shirt and send this to you.

£600 or more

£600 Reward

Like our kiteboard design? We will send you a copy of one, with a special thank you message, with standard fins. Though you know that any prototypes from now on are designed and tested with this board!

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