Is anyone else making really small/skinny tails that are 30mm screw spacing standard mount? I can’t believe its just Axis making the ultra-high aspect 25mm and 30mm chord tails.
Duotone h tail
KT atlas tails
I have the AFS HA38, it is the closest I could find. None of the other listed are anywhere near the really skinny Axis 358/25 and 358/30
| Tail | Size | Aspect Ratio |
|---|---|---|
| Axis 358/25 | 70 | 18.2 |
| Axis 358/30 | 86 | 14.9 |
| Axis 358/35 | 105 | 12.4 |
| Code 120R | 120 | 10.8 |
| AFS HA38 | 135 | 10.6 |
| Unifoil Afterburner 14.5 | 142 | 10.2 |
| KT Atlas | 145 | 9.7 |
| Duotone H | 125 | 8.5 |
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Code 120R is 10.8AR. I really like it. I would try even smaller/higher AR if they made one down the road.
And in respect to mounting, code has published a 3d model to print to adapt their tails to flat mounting.
@jondrums I can print you one if you go this route.
They also publish flat to code adapter and that has worked for me for a kd maui race tail onto a code setup, I am also in the market for a similar smaller tail, as I want less force when dropping into larger ocean swell.
I have been able to try a buddies 30 skinny dockstarting and the thing was quite loose in pitch, quite an interesting foil.
Seems like there’s a market here. KDW?
oh! I forgot about the Code. I updated the table and might try and buy one. I will take you up on the 3D printed adapter idea. Although I am kind of thinking of just buying an AXIS and drilling two new holes at 30mm
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Uni has the new Afterburner tails that’s also 3cm hole spacing. Nowhere near the Axis AR though. Closer to the KT one.
15.5 (152cm²) AR 10.8
14.5 (142cm²) AR 10.2
123cm X 13.7AR
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Having not found any option at all less than 120cm and AR greater than 11, I bought an axis skinny 35. This thing is really pretty awesome. The first wave I dropped into I faceplanted, I got surprised by the pitch-twitch of riding such a small tail. But after that I was ready for it, and everything was on-fire. Better glide, no downside to pumping, plenty of low end, and the front foil comes alive turning. But you have to be on top of weight distribution to manage height on the mast.
I took the Axis tail to the belt grinder to make it bottom mount, and re-drilled it for 30mm hole spacing.
This is the 35Skinny next to the smallest tail AFS makes HA38 which looks humongous in comparison.
Lastly, if anyone wants me to modify an axis skinny for you, I can do for a few $$, or I’m happy to give some advise.
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@jondrums please do share some tips, I have an Axis 35 I’d like to do this to, and then chop my HA38 for a surfier feel
Updated the table.
The axis tails are rounded both top and bottom making them super annoying to adapt. If you have access to a 3D printer, it would be smart to make a shim that matches the rounded shape. You will want about 2.5-3deg of angle of attack to the flat surface of your fuselage. I personally would glue the shim onto the tail first, then use its flat face to clamp the tail in place while you drill two new holes at 30mm width with a drill press. That way you’ll get the two holes and their countersunk relief square to the mounting surface.
After the holes are in place, I screwed the tail into a board with wood screws to hold it steady and went after it with a sander to remove all the extra un-needed carbon that was only there for it to fit in the axis fuselage tail mount.
Good luck, you’ll love the ride
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Gong with some AR-18s
Seems that they are intended for pumping only though
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Shoudl work well for DW too?
I would think so, but maybe there are some issues with strength/rigidity?
cant imagine they do worse than g10 or axis skinnies
I love how you answered your own post. This used to happen to my posts all the time. I was the person most interested in the answer and would do the work to answer my own questions.
The skinny tail is an interesting evolution. I dropped from the 40 skinny to the 35 skinny with the Axis 1401 and found it too tiny, then I tried with the Fireball 1350 and was experiencing bizarre tail stalls. Little drops in nose pitch, and I could hear slurping, but unlike true front wing breach the dips were recoverable more than half the time.
I did not find that the 35 pumped as well as the 40 but it was noticeably faster, or felt more slippery. I have since gotten used to the 35 with the 1350 combination and have not been experiencing the tail stalls any more. I think it was just adjusting weight to be more on top of the front wing and not overwhelming the tails resistance to foot pressure at lower speeds.
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