Forums > Windsurfing   Western Australia

Windsurfer catamaran

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Created by christophe1974 2 months ago, 2 Nov 2020
christophe1974
WA, 47 posts
2 Nov 2020 5:46PM
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hello, my name is Chris,
Im new to this forum

i looking for some help to source 2 old style long windsurfer board for a project i have. i need boards with dagger keel .if anyone know when i might be able to get my hands on some for a low price it would be highly appreciated. Someone might have some of those old fashion board sitting in the garage collecting dust.

RichardG
WA, 3312 posts
4 Nov 2020 5:43PM
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Please do not turn any Mistral into this abomination you are conceiving. Thanks.

christophe1974
WA, 47 posts
5 Nov 2020 11:06AM
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RichardG said..
Please do not turn any Mistral into this abomination you are conceiving. Thanks.



Thanks for the link, no permanent modification will be done to the boards, might be an abomination to your opinion, but if it gets me and my kids having fun on the water with a sail. i think its worth the try. worst case i use the board as it is when i want to as they will still be original. I'm sure the kit surf look like a stupid idea to some people when it first appeared ,in the few of hardcore sail guys. Time will tell if it ends out a cool and practical thing or not.

christophe1974
WA, 47 posts
22 Nov 2020 7:47PM
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christophe1974
WA, 47 posts
22 Nov 2020 7:51PM
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christophe1974 said..




No modification made to the boards. Every thing can me remove and put back if want to use as single board.. still need to fit the sail and sort out a rudder.

Zed
WA, 1222 posts
25 Nov 2020 2:19PM
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christophe1974 said..

christophe1974 said..




No modification made to the boards. Every thing can me remove and put back if want to use as single board.. still need to fit the sail and sort out a rudder.


Interesting project! Looks cool. Not sure about the PVC piping though? I would have thought one slight mishap/capsize, they would snap like a twig?

christophe1974
WA, 47 posts
25 Nov 2020 6:57PM
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I hope not. I used 60mm pvc pressure class 12 pipe and 90mm for the base. With tentionning cables . I am hopeful.. tested the sail at home. Seem to hold. Just need to finish the rudder





Obelix
WA, 926 posts
25 Nov 2020 7:32PM
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Not tempted to foil it ?

christophe1974
WA, 47 posts
25 Nov 2020 10:24PM
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Yes. If someone want to donate 4 of them. 2 may not be enough

christophe1974
WA, 47 posts
28 Nov 2020 2:59PM
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All done. Ready for water test




decrepit
WA, 10279 posts
28 Nov 2020 7:44PM
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Instead of having the boards flat, it may work better if they are angled, so that the one in the water sits flat, depends I guess if you are going to sail it powered up enough to lift one hull

christophe1974
WA, 47 posts
28 Nov 2020 7:48PM
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Thought about this
. But too much stress on the frame having to lift one hull. More stable and solid sharing the load on both. Also max buancy having both flat.

decrepit
WA, 10279 posts
29 Nov 2020 8:56AM
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christophe1974 said..
Thought about this
. But too much stress on the frame having to lift one hull. More stable and solid sharing the load on both. Also max buancy having both flat.

So as soon as a hull starts to lift, you're going to sheet out?
That's going to kill most of the fun.

Tardy
3846 posts
29 Nov 2020 11:07AM
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interesting design ..just wonder how your weight being at the back of the boards ...it might wheel stand ...are the seat able to come forward where more foam is ...just an observation ,i might be wrong .
or a small flotation board added to the rear .?

great design ,

decrepit
WA, 10279 posts
29 Nov 2020 3:38PM
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Tardy, looks like the seats are where the foot straps normally are, so it would need to be powered enough to normally get in the straps, to stop it "wheel standing"

Tardy
3846 posts
29 Nov 2020 4:10PM
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decrepit said..
Tardy, looks like the seats are where the foot straps normally are, so it would need to be powered enough to normally get in the straps, to stop it "wheel standing"


ok

i would love to see it up and moving ,having the choice of been able to use bigger or smaller sails is a huge bonus over a catamaran .

hey chris ,can you post pictures of steering ,while seated ,or are you going to use the boom and only have the kids seated ?

christophe1974
WA, 47 posts
29 Nov 2020 7:06PM
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Tardy said..
interesting design ..just wonder how your weight being at the back of the boards ...it might wheel stand ...are the seat able to come forward where more foam is ...just an observation ,i might be wrong .
or a small flotation board added to the rear .?

great design ,


Good Observation, i had this problem when trying to find the ideal spot to sit, unfortunaly the seat is as far as possible forward due to the dagger keel in the way, also i am hoping that i am not to heavy to sink the back, and hope that the sail weight and the frame forward, makes the front goes down enough to keep the back up.. the other thing i am hoping for is because the sail is fix,, not pulled backwards like in the normail windsurf.. it may pull the back up as soon as you start moving.


christophe1974
WA, 47 posts
29 Nov 2020 7:08PM
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also hoping that having 2 boards locked to each other will give me more buoyancy to compensate for the rear body weight, i have to say the foot strap were all far back, so the board is meant to go quick with rear weight. should be testing tomorrow or tuesday.

decrepit
WA, 10279 posts
29 Nov 2020 8:49PM
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Good luck mate

christophe1974
WA, 47 posts
30 Nov 2020 7:40PM
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Tardy said..

decrepit said..
Tardy, looks like the seats are where the foot straps normally are, so it would need to be powered enough to normally get in the straps, to stop it "wheel standing"



ok

i would love to see it up and moving ,having the choice of been able to use bigger or smaller sails is a huge bonus over a catamaran .

hey chris ,can you post pictures of steering ,while seated ,or are you going to use the boom and only have the kids seated ?


christophe1974
WA, 47 posts
30 Nov 2020 7:41PM
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Trying it Tommorrow at luckybay.. around 11am.

christophe1974
WA, 47 posts
1 Dec 2020 6:13PM
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The day has come.. I tried it on the river today. With quite strong wind. Sometimes you Got to run before you can walk. Lot of flex in the frame. But nothing broke. Rudder need to be bigger and add 2 more tension ropes for mast as security. Thanks for the support and the thumbs up of the guys that were there. Bottom line it's working and not wheeling up at all.. also pretty quick. A link for a YouTube video should be available in 2 hours.




christophe1974
WA, 47 posts
1 Dec 2020 9:11PM
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Link to the maiden

christophe1974
WA, 47 posts
1 Dec 2020 9:11PM
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Link to the maiden

photosbykarlo
221 posts
2 Dec 2020 6:13AM
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Gold, but were are the Kids, even the Titanic had a full complement on it's maiden :)

So what's the next step - foils

christophe1974
WA, 47 posts
2 Dec 2020 10:01AM
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HI, No kids for maiden, was trying to avoid the casualties, in case of ending like the titanic, but maiden was not so bad, i should be trying again on Wednesday or Thursday with the new improvements. looking into a custom made foil fitted where the back fins were to raise the back a little while moving.

regarding the foil, i am thinking of using 2 pair of hydrofoil,
www.bcf.com.au/p/blueline-hydrofoil-to-50hp/329254.html?gclid=EAIaIQobChMIx733k5yu7QIVuoNLBR2SRAi5EAQYASABEgJBM_D_BwE&gclsrc=aw.ds

what do you think,, to lift the stern where i sit, cheap option i think

AUS 808
WA, 373 posts
2 Dec 2020 10:09AM
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christophe1974 said..


Link to the maiden


I think you are sitting on the wrong side, if it gets wind you will capsize.
The Poly Pipe won't last but the basic design seems to work

christophe1974
WA, 47 posts
2 Dec 2020 10:24AM
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AUS 808 said..

christophe1974 said..


Link to the maiden



I think you are sitting on the wrong side, if it gets wind you will capsize.
The Poly Pipe won't last but the basic design seems to work


Fair point. it did get wind though. i did change side.. so not sure which one is the wrong one. you mean be the opposite side of the sail?

Jacko51
SA, 195 posts
2 Dec 2020 4:17PM
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Your Rudder may not be too small. Need a rudder on each hull and you are not using it correctly. Should be pointing down not parallel like in the vid.
And maybe some foils like these - Goodall Foiling VIPER (goodalldesign.net) instead of the centreboards

christophe1974
WA, 47 posts
2 Dec 2020 5:23PM
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I have modified the Rudder today with a large and deeper plate. Should have more authority. . Hope the pvc last long enough to have some fun. The beauty with the pvc is that it is easy to replace.



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Forums > Windsurfing   Western Australia


"Windsurfer catamaran" started by christophe1974