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[wouter]

Hehehe.
i am going to make a CS for myself, 76kgs.size 42
a 6.05 shortboard for mediocre waves 1-6 foot
i reckon a skin on bottom of 1mm balsa and 1.5mm balsa on top.
But how thick should i make the rails if i clamp a lay'up of balsa sheets on them?
And should i reinforce the joint of top skin to rail? and bottom too while we are at it.
Cheers guys
Wouter

[Benny]

Hiya Wouter,  most of the guys making shortboards are bagging on the bottom skin, then the rails, shaping the deck & rails together, and then bagging the top skin over the edge of the rail for a little reinforcement along the edge.  Sand that joint smooth, then lay up (or bag on) both sides' outer glass.  I think your balsa schedule sounds fine - I use all 1/16" top & bottom balsa on longboards, which I think is the same as 1.5mm. 

[admin]

hey wouter
i use either 15mm or 12 mm
id go with 15 for your thinner skins
adds a bit more strength and allows for a less critical tolerence when final rounding over the rails

i use 3 to 5 mm for the deck skin
and 2 to 4 mm for the bottom
and dont reinforce anything underneath
if i was using thinner skins id look at reinforcing around the rails if the boards were coming out to flexible

im in the thick skin low density core school

paul cannon

[scot]

Hehehe.
i am going to make a CS for myself, 76kgs.size 42
a 6.05 shortboard for mediocre waves 1-6 foot
i reckon a skin on bottom of 1mm balsa and 1.5mm balsa on top.
But how thick should i make the rails if i clamp a lay'up of balsa sheets on them?
And should i reinforce the joint of top skin to rail? and bottom too while we are at it.
Cheers guys
Wouter

Hey Wouter, i am thinking of doing the same thing but for better quality waves.
I am a similar weight to you and 170cm tall.

what is you outline going to be like?
How thick and wide are you going?

My thoughts are curvy rounded pin (probably like a CI black beauty) outline.
6'0 x 19.5 x 2
my 'normal' pupe would be 6'2 x 18 3/4 x 2 1/2

what do the experts think? 

Benny, what thickness rails do you use for your longboards? would you thin them out for a shorty?



scot

[wouter]

Thanks everybody!!

2 Scot ;
Will be going for 6.04 and with 19.5-20.0 width and a swallow tail.
4.5 nose rocker  and 2.2 tail, with some copied rocker of the profile page i once printed from pipedreamsurfboards.
want to keep thickness down, for sensitivity and flex. i never made a compsand, so i do want to be sure it flexes, since flex is sometime killed with all the heavy wood and glass.
Wider board that are thinner will flex a bit more since there is more water pressure over the whole surface.
cheers.
wouter

[paul cannon]

hey wouter
an often overlooked issue is
vacuum pressure (i never go over 10 hg) pref about 6 or 7
and excess resin on the inside

thin skins will allow for a flexible board using balsa
but the decks compressive strength will be reduced imo
but its still fine because its still way stronger than pupe