Here you can exchange your experience and datas about your home build boards
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teftelja
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Postby teftelja » Fri Aug 07, 2020 4:19 pm
I built one 106x43 board as Merl did but the foam was 55 kg/m'3. Holds my 90 kg nice. Weighs 1750g with Eva pad. Maybe 80 kg foam is overkill?
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TomW
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Gong Veloce M, 100cm carbon mast
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Postby TomW » Fri Aug 07, 2020 6:34 pm
teftelja wrote: ↑Fri Aug 07, 2020 4:19 pm
I built one 106x43 board as Merl did but the foam was 55 kg/m'3. Holds my 90 kg nice. Weighs 1750g with Eva pad. Maybe 80 kg foam is overkill?
Whats your laminate schedule?
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teftelja
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Postby teftelja » Sat Aug 08, 2020 2:08 am
One layer of 240 g cf. A strip of 20 cm wide 230g ud cf 50cm length both sides. A couple of patches 240g cf over the foil mount for compression strength. Foam is 2 cm airex c70.55.
Lamination done in two stages - top (all layers) , then bottom(all layers).
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teftelja
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Postby teftelja » Sat Aug 08, 2020 2:13 am
But I like sandwich construction more. 200 gcf-3mm airex C. 70.75-200g cf-xps-200 g cf-airex-200g cf. It comes a little bit heavier but more rigid. And it is easier to set rocker.
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teftelja
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Postby teftelja » Sat Aug 08, 2020 2:19 am
160 g spread tow cf is sheduled for next sandwich board.
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teftelja
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Postby teftelja » Sat Aug 08, 2020 3:00 am
This 1800 g board snapped only when me (90kg) and my friend (88kg) have stood on both sides of board and started to bounce a little. I think this strength is quite enough. The board was repaired after this so called 'load-factor method' testing.
P. S. This board was made from 2 cm 55 kg foam with one layer of 240 g cf, a couple of patches, and ud strips.
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merl
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Postby merl » Mon Aug 10, 2020 9:28 am
Sadly for us they moved to Croatia (near Slovenia border) in 2019. But this could be good news for some (although I didn't find them so cheap...)
Good point about the environmental issues. I think one reason HD foam became expensive is because they used to make it with
gasses like freon which is probably much more restrictive now.
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kollac
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Postby kollac » Mon Aug 10, 2020 1:39 pm
merl wrote: ↑Mon Aug 10, 2020 9:28 am
Sadly for us they moved to Croatia (near Slovenia border) in 2019. But this could be good news for some (although I didn't find them so cheap...)
Good point about the environmental issues. I think one reason HD foam became expensive is because they used to make it with
gasses like freon which is probably much more restrictive now.
For some reason I think downunder is actual familiar with Croatia...no?
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- downunder (Mon Aug 10, 2020 2:24 pm)
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RalfsB
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Postby RalfsB » Mon Aug 10, 2020 1:54 pm
I am thinking: what if the pocket board would be thick and narrow (like 109cm long, 10cm thick, 31cm wide); I am planning to use with a big wing (1100cm2). What would be the drawbacks of making it narrow? Harder to switch feet?
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TomW
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- Gear: TW Surfboards hydrofoil board 110
Gong Veloce M, 100cm carbon mast
Ozone Hyperlink V1 7m
Hyperlink V2 9m, 13m
Concept Air Wave 4,5m
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Postby TomW » Tue Aug 11, 2020 8:50 pm
RalfsB wrote: ↑Mon Aug 10, 2020 1:54 pm
I am thinking: what if the pocket board would be thick and narrow (like 109cm long, 10cm thick, 31cm wide); I am planning to use with a big wing (1100cm2). What would be the drawbacks of making it narrow? Harder to switch feet?
Definitely risk you will step off the edge of the board during transitions.
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- RalfsB (Wed Aug 12, 2020 9:35 am)
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