Page 1 of 2

The New 2018 Airush Core Foil Series Out Now

Posted: Mon Dec 04, 2017 11:03 pm
by Toby
Airush News:

The New 2018 Airush Core Foil Series Out Now


airush.png

The versatile Airush Core Foil range introduces a collection of foils and boards that take you on a journey through freeride, carving and beyond. A modular system that is easy to setup, and enable you to customize and trim your ride as you advance.

We will take you from your first steps, to defining your own style.

http://airush.com/boards/core-foil-board-range/

Re: The New 2018 Airush Core Foil Series Out Now

Posted: Tue Dec 05, 2017 3:30 pm
by Schmidy

Re: The New 2018 Airush Core Foil Series Out Now

Posted: Tue Dec 05, 2017 3:35 pm
by davesails7
That's a lot of curve on the front wing and angle on the stabilizer. Interested to hear what it's like. Seems like most other freeride foils have gone to flatter wings.

Re: The New 2018 Airush Core Foil Series Out Now

Posted: Tue Dec 05, 2017 4:46 pm
by Foil
davesails7 wrote:
Tue Dec 05, 2017 3:35 pm
That's a lot of curve on the front wing and angle on the stabilizer. Interested to hear what it's like. Seems like most other freeride foils have gone to flatter wings.
Wing looks my new 2018 Moses 590.

However if buying that Airush kit make me ride it like the guy in the video,
I will have 2
:D

Re: The New 2018 Airush Core Foil Series Out Now

Posted: Tue Dec 05, 2017 6:51 pm
by tegirinenashi
3 bolt mast connection, who invented this, Gillette? Just glimpse at the profile:
profile3.png
the leading and trailing holes are at the mast narrowest points, thus compromising structural strengths. Compare it to 2-bolt design
profile2.png
profile2.png (39.17 KiB) Viewed 647 times
and notice the cross beams surrounding the bolt openings located in perfect places. Just from profile comparison I would predict 3-bolt design to be twice as flexy as compared to 2 bolt one.

BTW, what is the mast thickness?

Re: The New 2018 Airush Core Foil Series Out Now

Posted: Wed Dec 06, 2017 2:13 am
by davesails7
tegirinenashi wrote:
Tue Dec 05, 2017 6:51 pm
and notice the cross beams surrounding the bolt openings located in perfect places. Just from profile comparison I would predict 3-bolt design to be twice as flexy as compared to 2 bolt one.
Because the bolts are in thinner material? Nah

Re: The New 2018 Airush Core Foil Series Out Now

Posted: Wed Dec 06, 2017 11:31 pm
by julienkerneur
Our goal is to have a hassle free foil design.
After many months of testing and different feedback, it was safer and secure with 3 bolts fixed to the fuselage and plate than 2 bolt option.
2 is probably enough but we found that 3 is more secure at both connection points to prevent broken or twisting of the foil.

As you can see in the video, I do give these foils a beating during the testing processes and I am confident in their durability and strength.

Our mast is 14mm in thickness. This thickness is a very good balance between the mast performance (less drag) and stiffness, especially with different mast lengths.

Re: The New 2018 Airush Core Foil Series Out Now

Posted: Thu Dec 07, 2017 2:36 am
by tegirinenashi
14 mm, thank you for the info.

To be honest, I have a problem with reviews. Most of them essentially boil down to "I took the gadget for a spin and had some fun". I'm sorry, but this is not a test. Even clever and funny reviewers like Kitefinder.com fall into this trap. Witness their foil "review": "We tested this high AR wing and it wants to go fast".

An informative test would be measuring flex and torsion numbers. This way you can prove that 3 bolt design doesn't sacrifice the rigidity.

Re: The New 2018 Airush Core Foil Series Out Now

Posted: Thu Dec 07, 2017 7:33 pm
by davesails7
tegirinenashi wrote:
Thu Dec 07, 2017 2:36 am
To be honest, I have a problem with reviews. Most of them essentially boil down to "I took the gadget for a spin and had some fun". I'm sorry, but this is not a test. Even clever and funny reviewers like Kitefinder.com fall into this trap. Witness their foil "review": "We tested this high AR wing and it wants to go fast".

An informative test would be measuring flex and torsion numbers. This way you can prove that 3 bolt design doesn't sacrifice the rigidity.
I like scientific measurement more than most, but a foil (or a kite, or a board) can't be compared on measurable values. So much of it has to do with the way it feels for the rider due to unmeasurable qualities.

Your idea that three bolts makes the connection less rigid doesn't make sense to me. Are you talking about torsion? How can moving the bolts further out from the center decrease torsional rigidity?

Re: The New 2018 Airush Core Foil Series Out Now

Posted: Thu Dec 07, 2017 7:55 pm
by tegirinenashi
davesails7 wrote:
Thu Dec 07, 2017 7:33 pm
Your idea that three bolts makes the connection less rigid doesn't make sense to me. Are you talking about torsion? How can moving the bolts further out from the center decrease torsional rigidity?
Because it is not the connection point that flexes the most? I assume that if the mast plate has a collar, then it it the whole mast flex that matters. What mast profile design element affects the flex/torsion the most? The spars:

Image

In 2-bolt design there are 4 spars:
profile2.png
profile2.png (44.81 KiB) Viewed 195 times
and you may argue that in 3-bolt one there are 4 as well, although two of them are too close to the leading and trailing edge to have the same effect. This is why I expect less flex and torsion resistance; not exactly two times less as I claimed earlier, but still less.