Looks like Stringy has an adaptor for this, it looks also like it will give you a little extra length so when our 90 comes out using this adaptor might give you more like 92-93 maybe. Axis Carbon Fiber Mast to Unifoil Fuselage Adapter – Stringfellow Hydrofoiling Solutions
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Is there a link to order only the mast cover? Seems like a great design. Thank you.
unfortunately at the moment no as its just one older lady making them for me and she struggles to keep up with what I need for my orders, if she can eventually make enough to get ahead we might be able to have them as an extra. I could get them made over seas in Asia (Maybe way cheaper as well) but for now, I want to support this local lady as long as I can which does mean limited numbers.
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Thabk you for sharing your measurements and also for introducing the term “wetted length” as I think it very aptly addresses a need that has been around for awhile now in discussing different masts from different brands.
I found that the One is 21% stiffer in bending compared to the AFS 80. However, as I mentioned earlier, I don’t yet have a protocol to measure torsional stiffness, which could be a key issue for masts with a low chord.
For context, my current method involves attaching the mast to a wall so that it extends horizontally, parallel to the ground. I then hang a 24kg weight approximately 60cm from the wall and measure the resulting deflection.
For torsional stiffness, I would attach the fuselage to the mast and hang a weight, for example, 40cm from the mast’s centerline. I would then measure the resulting angle of twist. However, I don’t yet have an effective method for accurately measuring the angle.
Since I measure deflection at approximately 60cm for every mast, the test doesn’t account for mast length. This means that, for masts with similar results, a longer mast will feel less stiff than a shorter one due to the additional leverage created by the foil.
21% stiffer than the 80! Wow. You’re right about questioning the torsional stiffness but that’s still a shocking data point for deflection. What made you choose 60cm for the test?
Jack,
I do not mean to unravel your industrial secrets, but can you give us an idea of how a small company as yours can not only built $$$ competitive masts, but also, apparently a fundamentally better product than large foil companies which probably have R&D teams and access to the best chinese manufacturers ?
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Stoked someone is benchmarking but would be really helpful to give order of magnitude. Relative percentage could be very meaningful. Is the AFS bending 0.1cm and the one 0.08 cm or 10 cm and 8 cm both are 20% difference. Am I understanding this correctly?
One 78 bends by 26mm
AFS UHM 75 33mm
AFS UHM 80 31mm
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The weight is attached with a 10cm strap, with the 60cm mark corresponding to the start of the strap. In practice, the weight is therefore distributed between 60 and 70cm.
This setup will allow me to measure all masts, even the shortest ones, while ensuring the strap applies pressure evenly along the mast.
It might also be interesting to take a measurement directly at the end of the mast (perhaps directly on the screws?).
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Thanks for sharing the deflection numbers! I did a similar test on the AFS 75, 80, and Cedrus with them ranking:
- AFS 80
- AFS 75
- Cedrus
But, I didn’t try to put percentages and actual deflection measurements on it. I hung the weight from the wingtip of the foil on my test.
If nothing else, comparing the two measurements (one on the end one at 60cm) would be interesting. I’d expect the deflection to be most relevant at full length since the ability to deflect and put greater forces into it increases the longer the mast gets right?
Not sure there are many secrets left in the industry these days 
On the price side is pretty easy as we mostly just deal direct so we cut out the retail margin plus we don’t have a massive team as every top rider who gets free gear and or paid to promote a product adds to the cost of the gear you buy, there is a place for this but for us we would rather do it a little different and just try to reduce the price where we can and if we do put money back into areas of the sport put it back in where it might benefit more than just a few. Down side to this is you have to see more vids of me showing the gear and not some frothing kid haha. Our overheads for running ONE are also crazy low with only myself and Angie doing 99% of everything which also helps, we have not paid ourselves for over 2 years from ONE as we also run another company which makes us money and have always just loved doing what we do.
Most of our gear is also not made in China, we do a few small parts in China but the main things like masts, front wings and some of our fuses are not made there. Actually th system I have at the moment is super hard on the logistics side but I will clean this up as we go.
R&d and I am with you and it is crazy to believe that some of the brands that have been around forever can somehow not be miles ahead. On our side we run this pretty simple, I try and deal with people much smarter than myself when it comes to the design side and when it comes to testing I try to do this myself where I can as I feel after all these years I have a good feel for what is working and what is not, maybe it’s just the old keep it simple rule really. We also only work on a few things at a time which is why you will see things like one mast developed at a time instead of a whole range and same for wings we will usually make one size at a time. It is a slow process but the end product usually turns out pretty good.
Don’t get me wrong as well the big brands who pump volume and sponsor all the top guys are needed as well and some are doing pretty good jobs, just for Me and Ang these days we prefer to try and do things a little different. We are not perfect either and have our down sides and fails but that’s part of the fun I guess.
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Thank you, that is pretty cool, but it looks like any gains from a low drag mast would be more than negated by the added drag of the adapter… Guess I have to wait and hope Uni makes a 95 cm version of their new mast…
It looks like it kinda depends on the brand though right? Axis, Lift, Code, AFS look like there’s no penalty. Some of the others, yes, but how much? We’d need to know the specs on all of the stringy adapters to evaluate for sure. This mast is super thin with a short chord, it’s in relatively uncharted territory as far as I know?
Following this thread with a lot of interest and the masts look very very good! But living in Europe, the Axis/Lift/Code compatibility just does not do the trick. Those brands are very small and the adapters for the other relevant brands (Armstrong, F-One, AFS) are quite bulky.
A question to you Jacko, if you don’t mind. Are there plans down the road for an other bottom connection for the mast? A Cedrus connection e.g. would be awesome, because then you can just make use of their existing adapter library and your mast will be straight away usable for almost every brand in the market! Then it really becomes an ONE mast 
.
I personally think this is the mast that a lot of Cedrus users (speaking for myself) had in mind when ordering their Evolution mast in terms of stiffness and finish. The mast is at such a good price point, but ordering a 400USD Axis to Armstrong fuse, which has a really aftermarket-y fit, destroys a big part of the good price & the gain in efficiency.
Curious on your take and on your future view of the compatibility of your mast! Thanks 
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I was thinking about this the other day, if other mast makers used the Cedrus evolution adapter interface and piggy backed onto his adapters. It would force the masts to have the same dimensions at the fuselage to fit well, regarding the chord and thickness.
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I think the look of the One Ocean UHM Mast is gorgeous and I love the idea that they aren’t trying to force it into a universal mast. It’s compatible with most brands if you want it. As far as the adapter drag goes, I think people forget that the Cedrus system would turn this from a gorgeous 12.2mm thick mast with a 102mm chord into a chunky 19mm thick 118mm chord adapter based system.
No plans for anything like that at the moment sorry.
Like most things in life there are positives and negatives and the foot of a mast is the same, its hard to have one thing that does it all and then if it does its usually not as good in some way. We use the foot we do as it does opens up a lot of options and really if we don’t make a wing that suits someone then chances are Axis, lift Code or any of the brands that someone makes an adapter for will and this has been our idea for quite a while now.
We are always looking and thinking about ways to make it all more universal so you never know whats around the corner but after seeing how a lot of brands think I am not sure universal is something they want.
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Yeah it would be interesting to see or feel how much the UNI adapter changes things. i am sure it would not be massive but good to hear from anyone who has used one of these adapters even on a axis mast and see what the thoughts are.
Hey all, i just got the One UHM 78cm SSS mast, coming off the axis 75cm HM mast. I can confirm it does everything as advertised! Much stiffer and faster than the axis! Im 83kg, dw riding the fireball 1070, i felt a bit wobbly at times on the axis mast, esp when it was messy, i was never gunna justify the $ axis ultra pro mast. I was sceptical that anyone could make an equivalent at half the price but im stoked i took the punt because it absolutely delivered. I used to have to nurse my old setup thru messy backwashy sections riding lower on the mast, the last two runs on the new gear totally confident to stay high and fast. It also proned great (spitfire 900). I think the One guys have another uhm model (SS) which is targeted at heavier dudes or riding wider wings (eg art pro 1201). I have no connection to the One guys, bought the mast myself (got lucky on fb marketplace), just thought the One guys deserved a massive shout out cause this mast is legit. If anyone reading this lives in Sydney and wants to eyeball one before committing, happy to show you!
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