Measured

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Gestalt
Gestalt
QLD
14964 posts
QLD, 14964 posts
10 Apr 2020 6:34pm
thought i'd measure all of my boards to see what went into their design..

First board is my sons 2013 JP Young Gun 85lt freestyle wave. a couple of kids have used this board and it's an excellent design.

glaring issue is the rail shape is not consistent from side to side. it's not out by a little bit either. the point that the rail goes from hard to tuck is about 300mm different on the left side versus the right side. maybe it was shaped by a kid!






Tardy
Tardy
5354 posts
5354 posts
10 Apr 2020 5:14pm
made for a goofy footer then ?
Gestalt
Gestalt
QLD
14964 posts
QLD, 14964 posts
10 Apr 2020 7:26pm
yep.. looks like it.
Imax1
Imax1
QLD
4950 posts
QLD, 4950 posts
10 Apr 2020 7:28pm
Cobra.
The rail tucking dood didn't give a s..t and didn't know what he was doing . He doesn't sail or surf , probably can't swim .
Getting paid peanuts and getting sick doing what he's doing . It's sad . That's why there's no pics anywhere of what goes on in that factory . Even though the big boys broshures say so , Eco friendly my ass !
It been a while since I've ranted , I feel better now
Gestalt
Gestalt
QLD
14964 posts
QLD, 14964 posts
10 Apr 2020 7:36pm
it will be interesting to see what my other boards are like. you might be able to unload a few more times before we are allowed out.

I just wanna cut the nose off this board....my son likes the nose because he gets bigger jumps.
olskool
olskool
QLD
2463 posts
QLD, 2463 posts
10 Apr 2020 8:19pm
Ahhh, the ol assymetricals are back in vogue! Just at other section of board...
Ben1973
Ben1973
1008 posts
1008 posts
10 Apr 2020 7:45pm
Imax1 said..
Cobra.
The rail tucking dood didn't give a s..t and didn't know what he was doing . He doesn't sail or surf , probably can't swim .
Getting paid peanuts and getting sick doing what he's doing . It's sad . That's why there's no pics anywhere of what goes on in that factory . Even though the big boys broshures say so , Eco friendly my ass !
It been a while since I've ranted , I feel better now


I cut in half a well know big brands board which came out of the cobra factory. Big lumps missing from the foam and one layer of glass had never seen resin
sailquik
sailquik
VIC
6171 posts
VIC, 6171 posts
10 Apr 2020 10:02pm
Gestalt said..
glaring issue is the rail shape is not consistent from side to side. it's not out by a little bit either. the point that the rail goes from hard to tuck is about 300mm different on the left side versus the right side. maybe it was shaped by a kid!



Hmmm, that is really interesting.

Does the board go faster or turn better on one tack or the other? If not, that might be an indication that rail shape in that part of a board doesn't make any real difference anyhow.
Gestalt
Gestalt
QLD
14964 posts
QLD, 14964 posts
10 Apr 2020 11:25pm
i'm not sure. can't say my son or his friend would notice. they both really like the board.
we need to remember it's a freestyle wave board. wave on the left freestyle on the right.... haha.

i'll put a hose on the rail tomorrow and see how it releases.
Gestalt
Gestalt
QLD
14964 posts
QLD, 14964 posts
11 Apr 2020 10:25am
Starboard Flare 111lt 2012. 2345x66 slot box.
my son uses this as his lightwind bump and jump board. straps as measured are set as close together as possible.
adults would have them further apart. remember these measurements are nominal only and won't be exact.

this board is a bit of a classic.





NotWal
NotWal
QLD
7436 posts
QLD, 7436 posts
11 Apr 2020 12:34pm
Gestalt said..
thought i'd measure all of my boards to see what went into their design..

First board is my sons 2013 JP Young Gun 85lt freestyle wave. a couple of kids have used this board and it's an excellent design.

glaring issue is the rail shape is not consistent from side to side. it's not out by a little bit either. the point that the rail goes from hard to tuck is about 300mm different on the left side versus the right side. maybe it was shaped by a kid!







Taking after his old man. His first board is asymmetrical.
Gestalt
Gestalt
QLD
14964 posts
QLD, 14964 posts
11 Apr 2020 1:07pm
Well spotted dave!
Gestalt
Gestalt
QLD
14964 posts
QLD, 14964 posts
13 Apr 2020 11:06pm
next, 95lt quad wave board.





Gestalt
Gestalt
QLD
14964 posts
QLD, 14964 posts
13 Apr 2020 11:09pm
it's interesting that 3 different boards from 3 different manufacturers have very similar entry rockers.
mr love
mr love
VIC
2424 posts
VIC, 2424 posts
14 Apr 2020 2:37pm
Justin...I am trying to understand the bottom shape on that Quad...is it double concave or tripple?
Gestalt
Gestalt
QLD
14964 posts
QLD, 14964 posts
14 Apr 2020 2:52pm
hey martin.

it's double concave inside a mono concave. the way the 2 concaves relate means the line i'm showing is notional only. with a double concave inside a mono concave the double concave is deeper near the rail. with this board the concave centre flows out where the rear fins are.

there are a few manufacturers that use this type of bottom shape. I didn't put the board manufacturers name on this one. while it is not their current shape I think the latest model fairly similar.
Gestalt
Gestalt
QLD
14964 posts
QLD, 14964 posts
14 Apr 2020 3:03pm
I need more time on this board. it's a pure wave board I use for high wind bump and jump and it's been a poor season for high winds. the concave setup has a feel to it which I don't mind. one thing is for sure I need more volume in the tail for my weight. whilst I love carving this board it takes me a while to get it up to speed because the tail sinks.

next board is a thruster board in the rack
mr love
mr love
VIC
2424 posts
VIC, 2424 posts
14 Apr 2020 5:05pm
Also has generous rocker which will make it a bit tougher to get it up but I guess with that complex bottom it id hard to measure
the true rocker as it will vary all over the place.
Gestalt
Gestalt
QLD
14964 posts
QLD, 14964 posts
14 Apr 2020 5:30pm
yeah it does.

to make a blanket statement,

I guess mono concave boards are harder to get right. you need more rocker to turn because they have no V but that causes drag which effects early planning and speed. to overcome that deeper concaves are used. getting that balance right must be difficult.

a V bottom seems simpler,, the rocker can be flatter along the stringer for early planning and speed and heavier along the rail for turning.
i know things are not as straight forward as that but that's my observations so far.
Gestalt
Gestalt
QLD
14964 posts
QLD, 14964 posts
14 Apr 2020 5:37pm
good point re rocker.

the rocker shown is along the centreline of the board. so in the case of the V bottom boards would be the true rocker profile.
in the case of the mono concave board the true rocker is the stringer profile plus the concave depth along the stringer. also the mono concave has 1mm of V in the tail.
mr love
mr love
VIC
2424 posts
VIC, 2424 posts
14 Apr 2020 9:01pm
Yep interesting shape.
Gestalt
Gestalt
QLD
14964 posts
QLD, 14964 posts
18 Apr 2020 8:26pm
65lt Tri


hoop
hoop
1979 posts
1979 posts
18 Apr 2020 6:55pm
Gestalt said..
next, 95lt quad wave board.






Hi Gestalt,
Are you going to build this ?
Gestalt
Gestalt
QLD
14964 posts
QLD, 14964 posts
18 Apr 2020 9:39pm
nope. too small for me.
I'm measuring my boards so I can understand them further. thought it would be interesting discussion but apparently not. probably do a longboard and then stop.

it would be good if people measured the boards they are commenting on.

am currently working up a design tho.
Gestalt
Gestalt
QLD
14964 posts
QLD, 14964 posts
18 Apr 2020 9:41pm
hoop said..



Gestalt said..
next, 95lt quad wave board.







Hi Gestalt,
Are you going to build this ?




sorry didn't realise you quoted the 95lt board. thought you meant the 65lt..

not building it I already own it and use it when the winds up.
Mark _australia
Mark _australia
WA
23676 posts
WA, 23676 posts
18 Apr 2020 10:12pm
I wanna know why hoops is asking
If he's interested so am I

My personal preference (waveboards) from all I've ridden and a few builds is a lot of rocker and then deep concaves to flatten out the centreline rocker to get it up and planing. Makes a fast board, but once you get it over on a rail it turns well as you start to engage a rail with a lot of curve.

Tons of ways to skin a cat though, and boards with an almost opposite approach are legendary wave riders.

When starting out, I compared a lot of rockerlines for a surfboard build and made my own that worked well. That first rocker template fits SO MANY factory boards its crazy. There really is so little difference, and so much comes down to the feel u like and its made by tiny tweaks. Now and then a legendary board comes along that so many people love and its usually middle of the road in all design parameters. My thoughts on bottom shape for waveboards are stolen from one of those boards (pretty much) that everyone loved.




olskool
olskool
QLD
2463 posts
QLD, 2463 posts
19 Apr 2020 12:48am
Measurements. How do you measure the cross section shape? Use a large set of calipers?
Mark _australia
Mark _australia
WA
23676 posts
WA, 23676 posts
19 Apr 2020 5:02am
^^^ yeah and its not fun.
Gestalt
Gestalt
QLD
14964 posts
QLD, 14964 posts
19 Apr 2020 9:45am
yeah I don't have large calipers (wish I did) so use another method.

stringer thickness measured by placing board on levelled horses. then measuring down from the level to top of horse.

rails I use a square and metal ruler to find the apex of the rail and the tuck distance.
the curve of the rail I take 2 dimensions from the square
that gives me 4 points

rocker is with metal ruler and a level. I set the level on the flat section of the rocker and mark the board to find the length and distance from the tail. then measure down from the level at measured points along the stringer. fins straps and other fittings measured with a tape and metal ruler.

when I draw the boards up in 2d cad I set them out from the flat.
Gestalt
Gestalt
QLD
14964 posts
QLD, 14964 posts
19 Apr 2020 9:56am
Mark _australia said..
I wanna know why hoops is asking
If he's interested so am I

My personal preference (waveboards) from all I've ridden and a few builds is a lot of rocker and then deep concaves to flatten out the centreline rocker to get it up and planing. Makes a fast board, but once you get it over on a rail it turns well as you start to engage a rail with a lot of curve.

Tons of ways to skin a cat though, and boards with an almost opposite approach are legendary wave riders.

When starting out, I compared a lot of rockerlines for a surfboard build and made my own that worked well. That first rocker template fits SO MANY factory boards its crazy. There really is so little difference, and so much comes down to the feel u like and its made by tiny tweaks. Now and then a legendary board comes along that so many people love and its usually middle of the road in all design parameters. My thoughts on bottom shape for waveboards are stolen from one of those boards (pretty much) that everyone loved.






it's an interesting shape the for sure. the board gets very high reviews so it definitely works. my own opinion is i'd like to see the v longer in the tail.

most of my boards are based around a v and double concaves.
Gestalt
Gestalt
QLD
14964 posts
QLD, 14964 posts
2 May 2020 9:19pm
boredom made me do it. i'm converting the 2d drawings above to 3d.





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