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Duotone Slick 2021

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Balticrider
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Re: Duotone Slick 2021

Postby Balticrider » Mon Mar 08, 2021 3:44 pm

joriws wrote:
Sun Mar 07, 2021 9:10 am
Patent? Kite wing has been patented 1982 by Jim Drake afaik seen by other (skimbat) source. Also when Skimbat wings have been with booms for 30 years..

To patent you need to have something new. They'll take your patent money but when patent is challenged you realize wasting money. At patents don't look application pictures but "claims". What is claimed to be innovated.
https://worldwide.espacenet.com/patent/ ... 20152198A1

joriws
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Re: Duotone Slick 2021

Postby joriws » Mon Mar 08, 2021 4:36 pm

Jim's story

https://www.surfertoday.com/windsurfing ... t-wing-rig

The patent from 1981
https://patents.google.com/patent/EP007 ... rake)+wing

Claim 1:
1. A hand-sail for propelling land vehicles and watercraft, in particular sailboards, with little drag in the direction of motion and relatively great drag perpendicularly thereto, characterized by two identical wings (24, 26), the main planes of which are disposed at an obtuse angle to each other symmetrically to a median plane, the wings forming a V shape open at the top under the influence of wind forces and having an airfoil profile, and in that a rigid middle boom (12) extending substantially over the length of the airfoil profile for grasping or holding the hand-sail is disposed on the median plane beneath the wings, whereby the wings and the middle boom constitute a substantially self-supporting structure.
Last edited by joriws on Tue Mar 09, 2021 8:47 am, edited 1 time in total.

Daniel_B
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Re: Duotone Slick 2021

Postby Daniel_B » Mon Mar 08, 2021 7:49 pm

Peter_Frank wrote:
Mon Mar 08, 2021 2:55 pm
But if the carbon rod has a good boom grip, it will feel and work good.

Some will like the superlight efficient without grip, others will like a more grippy boom.
Looks like the carbon mini boom is mostly naked carbon. So think I’m now leaning towards aluminum, which has full length grip material.

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Re: Duotone Slick 2021

Postby fluidity » Tue Mar 09, 2021 7:29 am

Daniel_B wrote:
Mon Mar 08, 2021 7:49 pm
Peter_Frank wrote:
Mon Mar 08, 2021 2:55 pm
But if the carbon rod has a good boom grip, it will feel and work good.

Some will like the superlight efficient without grip, others will like a more grippy boom.
Looks like the carbon mini boom is mostly naked carbon. So think I’m now leaning towards aluminum, which has full length grip material.
If it was me I'd go aluminium and wear the weight penalty. I've read some horror stories about fractured carbon fibres from kite control bars getting embedded in the hands. I wouldn't assume there's any kevlar to keep it together either.

Daniel_B
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Re: Duotone Slick 2021

Postby Daniel_B » Tue Mar 09, 2021 3:01 pm

Just ordered a 7m with alu boom. Should arrive mid April. Will probably not try it on water until late June (start of Swedish summer).

nixmatters
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Re: Duotone Slick 2021

Postby nixmatters » Tue Mar 09, 2021 4:10 pm

fluidity wrote:
Tue Mar 09, 2021 7:29 am
Daniel_B wrote:
Mon Mar 08, 2021 7:49 pm
Peter_Frank wrote:
Mon Mar 08, 2021 2:55 pm
But if the carbon rod has a good boom grip, it will feel and work good.

Some will like the superlight efficient without grip, others will like a more grippy boom.
Looks like the carbon mini boom is mostly naked carbon. So think I’m now leaning towards aluminum, which has full length grip material.
If it was me I'd go aluminium and wear the weight penalty. I've read some horror stories about fractured carbon fibres from kite control bars getting embedded in the hands. I wouldn't assume there's any kevlar to keep it together either.
I'd rather go for carbon/innegra or carbon/Dyneema. Both lighter than 100% carbon and there is not a ton of strain on that short boom affixed to a soft construction.
But let's leave it for Slick SLS next year :lol:

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Re: Duotone Slick 2021

Postby Daniel_B » Wed Mar 31, 2021 3:16 pm

Hi,

Longer product video, with some comments from Ken W.



Daniel


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