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From zero to...board. Done.

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sijandy
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Re: From zero to...board

Postby sijandy » Mon Sep 14, 2015 7:33 pm

downunder wrote: Weight 1820 grams atm.
I still don't know how you get away with using so little glass without it being way too flexi or snapping. Can you post some pics to demonstrate the flex?

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downunder
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Re: From zero to...board

Postby downunder » Tue Sep 15, 2015 2:26 am

Bille wrote:
downunder wrote: ...

One thing: all costs up to now are about AU$25-35. And that is a big, BIG, value for money :thumb:

TBC
Forget about the money ; that sense of Pride, for your workmanship, is
what it's all about ?

GOOD JOB !!! :thumb:

Bille
Thanks Bille. Yep, that is a food for the soul.

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downunder
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Re: From zero to...board

Postby downunder » Tue Sep 15, 2015 2:41 am

sijandy wrote:
downunder wrote: Weight 1820 grams atm.
I still don't know how you get away with using so little glass without it being way too flexi or snapping. Can you post some pics to demonstrate the flex?
Ha ha sijandy

still not a believer?! Ok, I'll make a vid after I finish this board. I've used 220+120 grams FG on top for this one, it would be even lighter with only 220.

Mind you, the tips are just 3mm for like =>10cm, than steady going thicker. And I can't bent it with my hands (do not want too much pressure since not glassed both sides).

sijandy
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Re: From zero to...board

Postby sijandy » Tue Sep 15, 2015 4:32 pm

downunder wrote: Ha ha sijandy

still not a believer?! Ok, I'll make a vid after I finish this board. I've used 220+120 grams FG on top for this one, it would be even lighter with only 220.

Mind you, the tips are just 3mm for like =>10cm, than steady going thicker. And I can't bent it with my hands (do not want too much pressure since not glassed both sides).
I'm struggling lol, vid will be good when you've finished. As a reference, if I suspend mine between to points approx. 2inches from the tips and then stand in the middle of the board between the inserts I get maybe 40-50mm of travel with a little light bouncing.

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downunder
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Re: From zero to...board. Done.

Postby downunder » Sun Sep 20, 2015 3:30 pm

Since the board top is now finished, I am about to do the bottom (already done one week ago).

One thing: if glassing separately top and bottom, the former should be glassed immediately after the first one. Otherwise the exposed wood might wrap, twist and worse if not epoxy sealed.

Drilling footpads holes before glassing. I am pre-drilling with a tiny "pilot"holes first to know where to drill from the top:
DSC02919.resized.JPG
Than I drill the top. This are the gloves and breathing mask, *always* using it when drilling a FG:
DSC02920.resized.JPG
If drilled from the bottom all the way through, the fiberglass on top will break into the pieces. It is much more neat if we drill from the top:
DSC02922.resized.JPG
The result with a bamboo veneer insert cover:
DSC02927.resized.JPG
Here we go, inserts all in place and the bottom glassed with a nicely saturated 120g FG:
DSC02929.resized.JPG
The added weight is: SS inserts 39 grams, and 46 grams FG. Plus epoxy.

After vacuuming and taking it out of a vac bag, I've splashed more epoxy on the bottom to seal it completely and get the mirror shine. I also sanded the rails.

The board:
DSC02930.resized.JPG
DSC02932.resized.JPG
DSC02933.resized.JPG
DSC02935.resized.JPG
DSC02935.resized.JPG (121.12 KiB) Viewed 1763 times
DSC02936.resized.JPG
DSC02938.resized.JPG
DSC02934.resized.JPG
Or before glassing and drilling and sanding rails:
DSC02918.resized.JPG
The board is *now* 1997 grams. Remember the target of 2kg? :thumb:

If I leave it as is, it will be less than 2kg. If I spray it with a PU varnish, it will be more. Some varnish will go on it, not sure how much atm.

Either way, it is light. Very light for 130x38cm.

Flex? Will see in a vid...

Enjoj!

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Re: From zero to...board. Done.

Postby rynhardt » Sun Sep 20, 2015 8:12 pm

Awesome, dude! Can't wait to see how it rides!
:thumb:

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Re: From zero to...board

Postby plummet » Mon Sep 21, 2015 1:38 am

downunder wrote:
sijandy wrote:
downunder wrote: Weight 1820 grams atm.
I still don't know how you get away with using so little glass without it being way too flexi or snapping. Can you post some pics to demonstrate the flex?
Ha ha sijandy

still not a believer?! Ok, I'll make a vid after I finish this board. I've used 220+120 grams FG on top for this one, it would be even lighter with only 220.

Mind you, the tips are just 3mm for like =>10cm, than steady going thicker. And I can't bent it with my hands (do not want too much pressure since not glassed both sides).
Looking good man. Remember too sijandy. Down under is not a large guy. He doesn't need to make a strong board for a heavy dude.

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Re: From zero to...board. Done.

Postby matth » Mon Sep 21, 2015 2:11 am

Very impressive!!!!!

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downunder
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Re: From zero to...board. Done.

Postby downunder » Mon Sep 21, 2015 12:22 pm

Thanks everyone

I promised some flex info so here it is! It takes a lot of guts to do this :cool2: I am 60kg:
Screenshot from 00023.MTS.resized.png


However, I propose some standard method for measuring a flex:

1) The board might stand on some wood pieces 39-40cm from the middle:


DSC02942.resized.JPG
Basically, this would eliminate any flex in tips which is highly flexible anyway on some boards.

2) The weight might be ~20kg with 2 concrete blocks placed in the middle.

This is with no weight:
DSC07196.resized.JPG
Flex with 19kg on top:
DSC07197.resized.JPG
If I see this right, flex is 5mm.

Removed a handle from my 120/40cm board, same setup:
DSC07195.resized.JPG
DSC07194.resized.JPG
Flex 6mm.

How's that sandy? :)

sijandy
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Re: From zero to...board

Postby sijandy » Mon Sep 21, 2015 1:01 pm

plummet wrote: Looking good man. Remember too sijandy. Down under is not a large guy. He doesn't need to make a strong board for a heavy dude.
Me neither. Unfortunately, from your pics I think I have my answers. Was hoping you had some mad secret techniques I could steal lol but I think our methods are pretty much the same, your boards are simply smaller and super flexi. Surely with that much flex you must get a lot of distortion and negative rocker? For comparison, I suspended mine on blocks roughly 2inches from the tips and stand in the middle (70kg) and get 15-20mm travel. The only way I've managed to keep the weight down is carbon fibre, just expensive and a s**t to work with. ps - what's with the two diagonal strips?


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