rydo said...

Posted - 14 hours, 14 mins ago
rydo said...

I am thinking about building a mutant based on the cardboard wave. I want to keep construction reasonably simple for my first board so was going to use a few layers of thin marine ply resined together to form the rocker. Then to seal the timber I think I will use marine varnish.
For the front fins I will just use standard tt fins but for the rear thruster setup I was thinking I could resin some fcs plugs into the ply Then I could cut down some old fins to the right size.
does anybody know if this could work?




Quote;
Yes, it would:

downunderbloghr.blogspot.com/

However, you'll need a fiberglass not varnish. One jump and it will break if only varnishing...Being there, done that:)


How thick was your board?
I Have already laminated two pieces of 6mm together. Surely this is enough without glass?
It has a slight concave through the middle and from what I understand this will add to the stiffness/strength?
It is still under weight so I will have a better idea of how ridged it is tommorow.

12mm with 6mm Marine ply and 6mm bamboo. If you check my blog you'll see...

That is a heavy board you're building. How heavy is it now?
It should be ok with no glass if u never ever jump:) It's the tiny voids in a ply which under stress will crack and finally break mostly under foot straps.
You can't do anything about voids I guess. Only glass can help.

But than you need a vacuum pump to glass it properly.

Hey plummet what's ya specs? What are you trying to achieve?

Righto. I have to ride it full speed backwards at wave lips and boost to the moon. Then i want to land slash onto a wave a ride that bastart like a surfboard upwind to get back to the same spot to do it all over again... that is the wholy grail for me. I much prefer to jump and ride waves upwind than to a down the line wave run and spend 3/4 of my time tacking out to see and back to do another wave run.

So.. .. .. ...

I want a more TT style mutant that rides a wave face ok and offer some nice bottom turns and slashes.

Its going to be a cross between the carboard wave and the decay cutlass board.

142 x 43. I'll make from solid vertically laminated bamboo 5mm core with 500grm triaxle class top and bottom making it about 6mm total thickness. I'm looking at 35mm rocker on the back half and 70mm on the front half. and 3-4mm of concave also.
Running a surf style fin in the middle and normal tt fins on the side of the 3 fin thruster set up.

I'll have binding locatition from centered to 10cm off center towards the rear.

Thats my plan so far. If yourve got any ideas to tweek my design i'm all rears.

Plummet said...

Hey Plummet, how do you make diff rocker on front and back?

I might laminate my bamboo today...

Plummet said...

simply make a press with different rocker front and back. The question is how much springback do i account for when making the press. So for i'm allowing 10mm.

Thanks for that.

Got it under vac pump today.

downunderbloghr.blogspot.com/

Can't wait to see the result.

dbabicwa said...

Plummet said...

simply make a press with different rocker front and back. The question is how much springback do i account for when making the press. So for i'm allowing 10mm.

Thanks for that.

Got it under vac pump today.

downunderbloghr.blogspot.com/

Can't wait to see the result.

Checked out your blogspot. Super impressive!

interesting. and mine is a morph between the cutlass and a cb wave. plus with my own weird cravings.

for a start i have used 1 x 5mm piece of vert laminated bamboo as a core. its going to be thin. will it flex too much? i dont know. i've used 600grm triaxle top and bottom with a 450 grm 150mm wide carbon stringer.

the proof will be in the riding in about a weeks time when the wind comes back!

interesting db.

Looks like your useing plain weave cloth while i'm using triaxle. In theroy I will have more stiffness per gram off glass than you construction as more of my fibres are running lengthways and i have zero runn at 90 deg.

but as you say the worst case scenario is that i have to slap another layer or 2 or Glass on there.

i wanted a more flexable board. so i may just be getting it!

PS no i never recieved a pm from you.

PSS looks like your using carbon/kevlar mix. if you axe the kevlar things will become alot easier to work with. carbon by itsself is no harder to cut and sane than glass.