firewire

Good Point!

Are you refering to what is know as, “Rocker Fallout”?

This can occur even if the blank as a stringer, to a lesser degree, however it still occurs.

Even the so called perfect board (Magic Carpet) can be digitally scanned then cut on a cnc machine and still not work as well as the orginal.

Like you mentioned many Pro’s like only one out of a batch of 10 boards that all look relatively the same?

If you use blanks with the correct deck rocker (EPS, XPS or PU) your chances are greater of reproducing the magic.

There are many professional board builders who have random blanks (2nd’s) without the correct rocker dropped off to the cnc cutting services.

Once these boards are cut, rocker fallout takes place. Then the shaper’s complain that the cutting service mess up there file or the machine sucks?

The same file cut made with a blank with the correct deck rocker will yeild a closer result to the model. If making stringerless epoxies vacuum bagging using a

rocker table comes in handy. There is also rail volume to consider however I’m getting off track and will leave that one alone for now.

Aloha Greg

How ya been! Good to see you here on Swaylocks. I have been enjoying yours and Berts discussion.

Quote:

For these pro boards to be so close yet to ride differently enough for them to reject them, then these tiny shape changes from one board to the next (of boards meant to be the same) hint at shape being so critical it’s ridiculous, whatever the structure…back at this point again!

thats funny, ive been in the same boat with up to 4 identical boards , with different structure and each has had insanly different performance features …

i think an appropriate comment now might be , Know thy medium …

or spend years trying to figure it …

we just built 3 identical boards for someone we all know , and i mean identical down to a fibre of timber shaving , same glass , same amount of resin down to the gram , same everything except they were all made with different sandwich material combos …will keep you posted on that one …

i think something that all designers are chasing is consistency …

being able to deliver magic time and again …

ive seen and measured boards so identical that i couldnt physically measure a discernable difference … yet why did they go different ?

im claiming wood …

it would be the most likely source of any major difference in flex return and feel , because everything around it can be reproduced or at least measured to be so close that the differences should be indiscernable …

when i have gone out of my way to find magic wood , then put it in the shape that i favour , it always ends up being magic …

every time i have built a board for a customer by going through the same selection process , the results have been magic …

who tests stringer wood ??

something outside the control of most board builders …

take the wood away all together and you get consistency , only problem there is its consistently bad …

maybe we just have to accept that the magic only comes randomly …

magic trees ??

who knows , i have to say , who gets bored trying to find the elusive magic formula …

regards

BERT

Quote:
Quote:

For these pro boards to be so close yet to ride differently enough for them to reject them, then these tiny shape changes from one board to the next (of boards meant to be the same) hint at shape being so critical it’s ridiculous, whatever the structure…back at this point again!

thats funny, ive been in the same boat with up to 4 identical boards , with different structure and each has had insanly different performance features …

i think an appropriate comment now might be , Know thy medium …

or spend years trying to figure it …

we just built 3 identical boards for someone we all know , and i mean identical down to a fibre of timber shaving , same glass , same amount of resin down to the gram , same everything except they were all made with different sandwich material combos …will keep you posted on that one …

i think something that all designers are chasing is consistency …

being able to deliver magic time and again …

ive seen and measured boards so identical that i couldnt physically measure a discernable difference … yet why did they go different ?

im claiming wood …

it would be the most likely source of any major difference in flex return and feel , because everything around it can be reproduced or at least measured to be so close that the differences should be indiscernable …

when i have gone out of my way to find magic wood , then put it in the shape that i favour , it always ends up being magic …

every time i have built a board for a customer by going through the same selection process , the results have been magic …

who tests stringer wood ??

something outside the control of most board builders …

take the wood away all together and you get consistency , only problem there is its consistently bad …

maybe we just have to accept that the magic only comes randomly …

magic trees ??

who knows , i have to say , who gets bored trying to find the elusive magic formula …

regards

BERT

When I see firewires in a surf shop now. I can’t help thinking the same thing I think when I see a Christian fish on a business card…Watch Thy Wallet.

Quote:

Oh yeah, love the humback foil idea, not attractive but yes a valid direction to try for sure. Mad looking things!

Yes those humpback foils go against the convention of aesthetic, flowing curve in a deckline for sure…

And the pics piss on my bonfire a bit…Is there anything left to try which has no precedent? Jeez, I’ll have to keep going…

Dug up these shots of the double concave deck I’ve mentioned…I spose it relates to the humpback, but its also something stimulated by the rail wood stiffness of a composite sandwich…

Josh


Hey Burt, congratulations on the nic carroll story. I hear you have gone out on your own. All the best, I hope you make a financial success of it.

Quote BB

no , not in the least do i regret that saying structure is more important than shape … i still stand by it …

I read that article in some airport somewhere and don’t have a copy to refer to however, at the time you were quoted as saying something like (after trialing a bunch of the new tech and obviously different shapes) Taj wanted the same shape he had been riding. Kinda indicates that for all the hype about the advantage of structure over shape, it contradicts your assertion that structure is more important than shape.

More interesting is GW’s comments that structure can turbocharge a shape…

Good structure on an average shape can give the perception of great advancements…… lotsa warm and fuzzies as we have seen here in the archives, that could mask the fundamental of getting the shape right first.

Gary

Quote:
...Is there anything left to try which has no precedent? Jeez, I'll have to keep going...

Josh

:slight_smile: That’s how I felt when I made the Peanut and then learned you & Bert had both done 'em too.

But your double deck is new to me. Looks insane. Is it a twin, or is the center fin just out for the pic?

Hey Benny,

Its pure twinny, not even any centre plugs… but big raked twins, 70-30 foil, made from bagged corecell with a fin-panel spine.

Its one of those ones where you learn to utilise the slide in small surf…I can whip those quick slippy little mid-face turns before angling back down for the real bottom turn, build speed, you know? The lightness at 2.1kg, the looseness, its all great up to 3ft, but cutbacks often end up sliding parallel to the wall. Its fun, but also refreshing to go back to a thruster and crank a real roundhouse where I know the tail will hold.

The aim with the double concave in the deck is that the bottom will get squeezed into a double-concave when the rocker increases under pressure. Now admittedly thats hard to measure, but even regardless of the theory, the archbar formed by the middle peak of the deck concaves gives a really solid connected feeling underfoot.

Going back to a conventional deckline lately for a board to be presented to “Normal” people, I found the extra height off the water of the domed deck so much more kinda floaty and disconnected.

I’ve made myself 4 of these DCD boards, and the best one is the ugliest for sure!!!

Josh

Josh-

I’ve been riding a double concave deck, I call it the camel deck, and anyting else just seems obsolete.

Maybe we are doing it for different reasons, but it’s still a winner.

I’ve shaped them for a handful of people and they all dig it. It just feels natural under the feet. Hard to slip off.

Don’t think it will do well in a retail shop scenario though. Looks a little strange. Even some “real” surfers think it’s too strange…? Oh well.

I’ve been doing them on P/U boards to stiffen the suspension and have some other experimental things going through right now.

Not sure if I’ll ever shape myself a crowned deck again…

Tim Stamps

www.surfboardsbystamps.com

hey josh lowering centre of gravity is always going to work iv been trying to do it forever’’ you just showed me how

bit hard on thruster might glass back fin

you guys doing a fantastic job keep up good work

                                        huie

"im claiming wood … "


Hi Bert -

I’d like to second that if I may.

Amazing Tim, amazing…Now I don’t feel like such a freaky loner!~

Josh

Good stuff, Josh & Tim. I know just the wave for it.

I surfed today on one of those beachie waves that finds itself on a bar, moves through a bowl, and then finds a shallow bit… the wave face will be about 6’ tall and all of a sudden you see a bulge throwing out of the middle of the face. You can either go low & get barrelled (and then slammed) inside the little 3’ bottom section, or you can ride high and kind of skim/float over the bulge & right under the lip.

I’ve been trying to figure out what to shape for that wave, as when you see it you have to have your response & your equipment really dialed. The right skinny rail and the right low volume (so you can drop it if you want) are critical, but those are hard to find when you also need to be able to pump high if that’s the better call, not to mention get in early enough to set up for the whole thing.

Now, I think I have an idea. Many thanks…

hey Nik …

[=1]

Quote:

[ 3]I read that article in some airport somewhere and don’t have a copy to refer to however, at the time you were quoted as saying something like (after trialing a bunch of the new tech and obviously different shapes) Taj wanted the same shape he had been riding. Kinda indicates that for all the hype about the advantage of structure over shape, it contradicts your assertion that structure is more important than shape.[/]

i will explain how that one came about …

i took these 3 boards to the goldy in feb 2005 …

one was modeled off one of Tajs favourite merricks , Nev threw a few numbers at me for the other , obviously being hand builds , getting them exact is not one of the easiest tasks …

these were the first introduction to the feel , as these boards circulated around the ranks over the next few months …

the rails were thinner than most crew were used to , because the last thing i wanted good surfers to feel was a boat …

in the process , there was a cautious approach because ,the fact the shape was different meant there was a mental barrier of thinking, " is this the best shape for me"?

i also had in that lot ,a full concaved deck which i rode , most crew saw that one as a novelty as well …

but in every case , even tho crew rode boards outside there normal dimensions , they could feel something going on with the flex that intrigued them and offered moments of inspriration , so it was a logical move to then go back to as close as possible ,a reproduction of a favourite shape …

this is the ideal starting point as you then have a feel for what the materials are doing …

from there again you can come back to shape as a means of tuning an unfamiliar medium as you become familiar with it …

so rather than blindly follow what others thought of the tech and what curves they thought should work best , Taj took it right back to basics and started from the only thing he knew to compare it too , his favourite shapes , for me it seemed pointless as i had covered that ground already and wanted him to ride what i had found to be effective , but for Guys on Tajs level ,to get to the level of sophistication they are at with there shapes , they really have to know there boards inside out ,if they are to have any chance of making progressive steps with design …

but they have to know the design trail that lead them to a certain point of the highest performance , because sometimes we can go on a tangent or even backwards in design , get a worse result and need to know where the last starting point was …

there had to be a logical line of understanding in the development of design changes …

so throw a guy on new materials , with different contruction and a shape different from the norm , then if its not right or better than the best board he ever had , what is the next move for a design change to improve things ???

have nothing to fall back on …

so credit there for taking the safest route to the quickest understanding of what is happening under his feet …

thats where the concave deck feels so right with composite sandwich , i did this last week , i had 3 new boards , all identical except different deck lines , one had a normal dome deck ,the other 2 were variations of the concave …

i also had 3 sets of fins to try , so i found this nice little quiet beachie on the central coast , parked the van near the waters edge and ran in and out 9 times changing fins and boards …

heres what i told someone else about the experience …

Quote:

I got some insane little beachies yesterday , surfed for nearly 4 hours , had 3 identical boards with subtle differences in deck shape , surfed all 3 boards , all with 3 fin combos , so it was in and out 9 times …

I didn’t learn anything new , but it was nice to get a refresher …

O I suppose I did learn something new , I can say tho , rolled decks just feel wrong …

thats why Taj now has dents shaped into his decks by FW , so his feet are bedded down …

fully concur with Josh , that the domed deck feels like your trying to surf with an air mattress between you and the bottom of the board , the concave deck lets you so close to the bottom , combined with the composite structure offering extra stiffness for the given volume and you have something that feels everything ,seems to respond so much earlier and makes you feel locked in , young crew who are doing rotational style airs are loving them , because they can go into a harder rotation and still feel like the board is sticking with them …

i hope that offers some insight into the comments i made …

in the pursuit of design understanding , there has to be incremental , logical changes, or else you can get lost in space …

regards

BERT

[/]

Another for Tim…

when you shape concaves into the deck do you match the concaves to the bottom or do you make the bottom flat and let the bottom find its own contour.

SC,

The bottoms are flat or subtle conc…

The location of the concaves in the deck will determine the changes which occur when the board flexes.

There is a critical variable which I don’t want to give away here…ooooh…

Josh

I would also think that the concaves shaped into the deck would stiffen the flex in the board the same way rail channels would.I have never ridden anything like what you are making but it would seem to make sense.I also like the way that it would feel under your feet kind of like a worn in poly but more durable.

Yes SC,

though the stiffening factor is but one of the effects…

One of the ones Bert and I made recently and which is earmarked for you, has a concave deck, so you’ll get the real thing!

Josh

Hell yeah and I can’t wait.What you and Bert are doing with surfboard design is amazing .I never thought that so many variables could go into making the magic board.The pictures of that double concave board are truly inspiring.I don’t understand why more mainstream shapers like merrick and rusty don’t try these kind of inovations.I feel like Sunova is the future of better surfboard design.Peace Karl