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Alu mast (strut) with 3 bolts - standard?

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jaros
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Alu mast (strut) with 3 bolts - standard?

Postby jaros » Fri Jul 06, 2018 10:07 am

Hi,
Is the 3 bolts alu strut becoming a standard? Are many producers using the same profile or does it only look identical?
Greetings,
Jaros
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strut profile.jpg

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Re: ALU mast (strut) with 3 bolts - standard?

Postby SparD » Fri Jul 06, 2018 10:31 am

Seems like it.

Seen this masts on foils from RRD, Takuma, Naish and Gong.

I'm sure there are other manufacturers using them and I think the reason is that chineese factories are offering this masts for a good price.

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Re: Alu mast (strut) with 3 bolts - standard?

Postby tegirinenashi » Fri Jul 06, 2018 2:44 pm


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Re: Alu mast (strut) with 3 bolts - standard?

Postby revhed » Fri Jul 06, 2018 4:25 pm

tegirinenashi wrote:
Fri Jul 06, 2018 2:44 pm
I'd argue that 2 bolts design is superior.
:thumb:
R H

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Re: Alu mast (strut) with 3 bolts - standard?

Postby Horst Sergio » Fri Jul 06, 2018 8:18 pm

I think reason here is just to fit kitefoilbox standard.

I think the basic idea of kitefoil box to allow one or two screw connection resutling in 3 holes is not bad. And also not to have them all in the same distance,

but todays best strut profiles in alu or same in carbon are just to small to fit 80 mm of distance for the needed M8 screws. Or they cause draggy fat profiles as that one on the picture.

Around 2 x 30 mm would have been much better, but it seems as now it is maybe to late to chance standard, isn't it?

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Re: Alu mast (strut) with 3 bolts - standard?

Postby HendrikVdP » Mon Jul 09, 2018 2:16 am

i'd love to know the exact measurements of all masts to be able to figure out compatibility.

here is what i measured from my North speedster mast :

Mast thickness : 15mm
Cord : 96mm
2 bolt fixing, M8 47mm apart

Baseplate 90mm x 165mm

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Re: Alu mast (strut) with 3 bolts - standard?

Postby bragnouff » Mon Jul 09, 2018 4:19 am

Zeeko's mast also uses 3 M8 bolts, but the profile is different. Longer chord, which means there is much more meat around the holes 1 and 3, and probably more torsional stiffness as a result.
Also the leading edge isn't as stupidly sharp as the one pictured, cause there's just no reason for it to be that sharp...

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Re: Alu mast (strut) with 3 bolts - standard?

Postby windmaker » Mon Jul 09, 2018 4:06 pm

jaros wrote:
Fri Jul 06, 2018 10:07 am
Hi,
Is the 3 bolts alu strut becoming a standard? Are many producers using the same profile or does it only look identical?
Greetings,
Jaros
With hydrofoils ,there are 2 types of manufacturers. Those who develop and do there own research, and those who make stickers. The latest are more likely to use generic parts which could be compatible between them.

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Re: Alu mast (strut) with 3 bolts - standard?

Postby cwood » Mon Jul 09, 2018 6:22 pm

I would not hold breath for compatible parts among manufacturers. This stuff will always be proprietary because those that can actually manufacture will constantly be changing stuff to have differentiation. No return in making mix and match possible...only hurts them.

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Re: Alu mast (strut) with 3 bolts - standard?

Postby Kamikuza » Tue Jul 10, 2018 2:45 pm

bragnouff wrote:
Mon Jul 09, 2018 4:19 am
Zeeko's mast also uses 3 M8 bolts, but the profile is different. Longer chord, which means there is much more meat around the holes 1 and 3, and probably more torsional stiffness as a result.
Also the leading edge isn't as stupidly sharp as the one pictured, cause there's just no reason for it to be that sharp...
But only two bolts on the fuselage to mast though? That also seems to be standard for the three bolts at the plate end too.

Axis now does two bolts at both the top and bottom, but the fuselage connection uses a tongue-in-groove to stiffen that joint. At least, the SUP/surf foil does, don't know about the kite foil.


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