I can’t find any, nor can I see how parabolas can be used in surfboard stringers.
Please can someone show me a parabolic shape in a ‘parabolic perimeter stringer’ ? . . . because so far I have come to the conclusion that there aren’t any. . . and that makes my BS detector use a lot of oil.
Here are a few ‘parabolic’ quotes. … it is noticeable that none of them ever mention where the elusive parabola is hidden:
“Future Shapes’ unique parabolic design represent the cutting-edge in new surfboard technologies”.
I think silly hit the nail on the head. The term ‘parabolic’ has name recognition from the snow-ski industry. ‘Perimeter Stringers’ is probably a more appropriate name, but it doesn’t sound as cool or technical.
Thank you Tom Bloke for getting this one cleared up, I’ve been scratching my head over this since Firewire started advertizing, finally figured the parabola must be somewhere on the rail profile or in the flex or who knows where? and i was giving the stupid Company credit for some techno knowledge/truth because their product looks pretty good, fooled me, now I don’t like them anymore and I think their product is phoney
for once, I agree with you Roy and I was actually going to start this thread a few days ago.
y=mx2+b
perimeter; yes; parabola, no.
though…there have been some perimeter stringered boards recently that have had the thickness of the stringer progressively thicker towards the middle of the board and thinner, if at all existent, at the tips and tails.
still. I call marketing BS; just another cool phrase for the sheep to swallow.
Show me parallel lines on the rails of a parallel template.
It more or less describes the shape as contrasted to the the traditional form it’s being compared to.
Maybe there is a better term like perimiter stringer but then someone would complain that the perimeter is on the outside.
Good watchdog call but we all have to read between the lines, everyday, everywhere.
Yep, that’s my take on 'em. Just “describing” the shape of stringer without being overly verbose. I guess they could be called the “stringer roughly following the outline of the surfboard but inset about an inch or two from the rail.”
I guess they could be called the “stringer roughly following the outline of the surfboard but inset about an inch or two from the rail.”
Right on! Now that will sell.
Well, at least it is more accurate.
I see what Tom’s talking about. There doesn’t seem to be a parabola to be found. I guess I’m just so jaded that I don’t get worked up anymore when some marketing jargon isn’t accurate.
I like the idea of the one post that maybe the parabola is in the curve of the stress distribution. Now that could easily be defended by double talk.
Here’s the right place for perimeter stringer stuff
BUMP. . . … . courtesy of the Old Hat Factory
We have been doing balsa boards with flexible perimeter stringers since 1996, in fact the third board we ever made had a perimeter stringer and was flexy, a concept we were promoting since 1995.
