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Speedboard Building - fast rockerline needed

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Created by Fredstyles > 9 months ago, 4 Mar 2009
Fredstyles

Fredstyles

86 posts
4 Mar 2009 2:11AM
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Hi,

my name is Andy. Im a german windsurfer and hobby shaper and I would like to start building my first speedboard as soon as possible.

Since there is no sailboard building community and only a very small number of speedsailors in Germany I still couldnt even get a sneak peek at a real speedboard.

I really like the outline and the volume distribution of the CA speedboards and I prefer a clean flat V bottom. But thats not enough making a board.

Maybe you can help me with the following questions regarding the scoop-rocker-line.

1. Length of the planing straight?

2. Tailkick? If yes, where does it start and how much?

3. Amount of Vee?

a) at the bow/entry?
b) under mastbox?
c)under footstraps?
d) at the tail ?

Any help is welcome.

TIA

Andy


mr love

mr love

VIC, 2401 posts
4 Mar 2009 8:51AM
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Hi Andy , You could try contacting Gunter Lorch in Konstantz. He is a custom builder and a speed sailor. info@custom-works.de
I was using one of his speed boards and it is fast and has a nice rockerline.

If you want to send me a Private message I can also give you some figures to help you out.

keef

keef

NSW, 2016 posts
4 Mar 2009 7:20PM
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mr love said...
[brIf you want to send me a Private message I can also give you some figures to help you out.
hi martin i'm interested in those measurements can you allso send them to me thanks. keef



mr love

mr love

VIC, 2401 posts
5 Mar 2009 12:34PM
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Keef, Divulging the secrets of the 'Love muscle" to the Germans is one thing but to give them to a New South Welshman ?, I,ll have to think about that.

keef

keef

NSW, 2016 posts
5 Mar 2009 1:10PM
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mr love said...

Keef, Divulging the secrets of the 'Love muscle" to the Germans is one thing but to give them to a New South Welshman ?, I,ll have to think about that.
thats what i figured martin , but it was worth a try

keef

keef

NSW, 2016 posts
5 Mar 2009 11:45PM
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Fredstyles said...

Hi,

my name is Andy. Im a german windsurfer and hobby shaper and I would like to start building my first speedboard as soon as possible.

Since there is no sailboard building community and only a very small number of speedsailors in Germany I still couldnt even get a sneak peek at a real speedboard.

I really like the outline and the volume distribution of the CA speedboards and I prefer a clean flat V bottom. But thats not enough making a board.

Maybe you can help me with the following questions regarding the scoop-rocker-line.

1. Length of the planing straight?

2. Tailkick? If yes, where does it start and how much?

3. Amount of Vee?

a) at the bow/entry?
b) under mastbox?
c)under footstraps?
d) at the tail ?

Any help is welcome.

TIA

Andy



hi andy
it all depends on the conditions your sailing? if your sailing flat water you can go flatter,finbox back & footstrapps back& out on the rails
but if your sailing chop you will need a slight V (5mm)from nose to tail, then 1mm taillift from the tail to the middle of the front strap & back strap, then 0mm at 1200 from start of tail lift,=4mm at 1200 then depending on the conditions your sailing but i wouldnt go any more than 175mm at the nose

1. Length of the planing straight? = 0mm at 1200 from start of tail lift or 4mm from tail

2. Tailkick? If yes, where does it start and how much? = 1mm about the middle and back strapps

3. Amount of Vee? =5m " if sailing chop you will need more vee from nose to front strapp"
a) at the bow/entry? =no more than 175mm
b) under mastbox? =4mm
c)under footstraps? =0mm
d) at the tail ?=1mm

i'm working on a duel rocker at the nose(thats flat with a V at the rails till the front strapp) and moveing the fin forward to keep the nose down in high winds, and strapps inward for heavy chopp
i'm sure there will be a few possitive and negative reply's to this post and everyone is welcome these mesurements are for a slalom speed not speed
" i made a board to these measurements " and i own a CA55, and in a straite line it will kick its ass, as for the wide boards like the isonic's

Fredstyles

Fredstyles

86 posts
5 Mar 2009 11:29PM
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@ mr love

Thx. Hope to see you doing 40 knots+ on gps-speedsurfing.


@ keef

Thanks for your contribution. What size was your made-to-these-measurements slalomboard?

In fact I want to make about 3 boards. One for flatwater and 5.6/6.8 sails and two bigger boards covering 6.8/7.8/9.0 sails for going fast in choppier conditions at my homespot.

My original question referred to the smallest flatwater speedboard. Concerning the bigger slalomboards I planned to make isonic-like boards because I dont know any better. The isonics seem to be the most successful slalomboards in Europe. But of course Im highly interested in shapes that can beat isonics, mantas and falcons max speed in choppier conditions whereas gybing is not so important for me.

Dual nose rocker: The HTS-production slalomboards shaped by Marco Copello have those bevels. But Marco combines them with concaves.

regards Andy

keef

keef

NSW, 2016 posts
6 Mar 2009 9:57AM
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Fredstyles said...

@ mr love

Thx. Hope to see you doing 40 knots+ on gps-speedsurfing.


@ keef

Thanks for your contribution. What size was your made-to-these-measurements slalomboard?

In fact I want to make about 3 boards. One for flatwater and 5.6/6.8 sails and two bigger boards covering 6.8/7.8/9.0 sails for going fast in choppier conditions at my homespot.

My original question referred to the smallest flatwater speedboard. Concerning the bigger slalomboards I planned to make isonic-like boards because I dont know any better. The isonics seem to be the most successful slalomboards in Europe. But of course Im highly interested in shapes that can beat isonics, mantas and falcons max speed in choppier conditions whereas gybing is not so important for me.

Dual nose rocker: The HTS-production slalomboards shaped by Marco Copello have those bevels. But Marco combines them with concaves.

regards Andy
mesurements are 235x52 x about 65lt sail size 4.0 to 6.7
after rideing this board i found the rails would catch in chop and the tail was a bit loose with the cutouts, so i beveled the rails and filled in the cutouts with divinicell and reshaped them, what i found with the tail lift is that the wake is futher back, with my CA55 it starts at about the front foot strapps ,and my board it's between the front and back ,but i have found that the venom fins help to lift the tail
the board is very responsive and feels so loose under foot, and jibeing a breeze, i can understand why you want to build your own board, the isonics are fast but they feel like a big board and jibe like one aswell, besides you need 2 of them, one for light winds and one for strong, as for my board it will plane in 12knts with a rs 6/7 & 36 venom fin, and still going @ 30+ with 4.5 sail a 28 venom have fun shapeing andy
ps i weigh 78 kgs


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"Speedboard Building - fast rockerline needed" started by Fredstyles



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