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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!
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 
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.
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.
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.
it's interesting that 3 different boards from 3 different manufacturers have very similar entry rockers.
Justin...I am trying to understand the bottom shape on that Quad...is it double concave or tripple?
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.
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
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.
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.
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.
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.
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.
Measurements. How do you measure the cross section shape? Use a large set of calipers?
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.
