Kiteus Maximus wrote:
The part below where you say you "have no facts"...is where you should have stopped. This is basic physics. This isn't an "opinion" discussion. It's physics 101.
Just research kinetic energy. Energy of motion
If you want to debate the optimal level of flex in a board to provide the optimal amount of pop then that's a different story. Bottom line is a stiff board does not provide better pop than a board with more (the right amount) of flex.
I must say, I dont think anyone of you are right here
I have no facts (yet) about this, but the stored energy in the board would be almost nothing at all IMO, so a too soft and too stiff versus a medium soft board, does not contribute to "energy" in any significant level whatsoever IMO.
I think (I dont know exactly, I admit, just my intuition and experience) that the difference is purely the dynamics of "correct" flex for a given board in given conditions (and maybe for a given rider too), will allow you to make the most efficient pop that gives you the best release and takeoff
So just as with kites and waveboards and everything else almost - I think it is the overall combination of physics and dynamics that is essential for giving the best (individual) board, so not about stored energy really, but all about getting a clean harmonic dynamic feel in the board, when you load and release
Just my thoughts...
C'mon, is this a joke ?
You've written something completely wrong several times, I have to say now, sorry
A spring (a board that flex'es) can NOT store kinetic energy, it can store potential energy.
Not known "fact" (at least I havent measured it precisely yet):
How MUCH energy is typically stored in a flexible board when we load max and jump - meaning what is the size of this additional height, board flex will be able to give you ?
It seems you make exactly the same misconception as those saying you "store energy in your kite and lines" when you load for the pop to a high jump, which is pure bollocks and wrong, and some who has not understood the complex nor the simple physics at all, and definitely no experience, just thinking "intuition", and being wrong
This is very normal and the most natural thing, and I understand this, so no problem about this for others - but you are making some harsh provocative statements that seems very unpolite and not from a physics book of this world KM
I gave the board flex and energy/height some further research now:
If you got a board, and you load it up with 5 times your own body weight (meaning you hold 400kg + your body weight if you are 80kg), and the board flexes down 20cm where you stand - then this stored potential energy in the flexing board will only allow you to "pop" somewhere between 30 and 50cm !
And holding more than 5 times your own weight, around 4-500kg, is extremely high - almost on the verge to frontlines breaking, so the effect will more likely be smaller than 30-50cm
which is the absolute max possible if you take a sane look at it.
I can easily show the physics and relatively simple calculations for this, if you want - but in this very case I would like you, Kiteus Maximus, to do it first, thank you
So IMO board flex does not really add any significant height to jumps at all !
I will still say, that the way a board flexes, does not really have an impact on the height because of the flex/energy alone, but the board flex contributes hugely to the height in order of giving the best dynamics for the individual person, in order to make his/hers release and pop (actually a rapid directional change with small loss is the goal) as good and efficient as possible
This is also what the other posters has experienced and write here - that the flex has to be "suitable" for them individually and not too much
The idea of physics is to explore how things work, and share with others how, and what you discover - and discuss if doubts.
To share with others, is the whole idea
I must say, I can not see the purpose of stating things "out of the blue" and putting others down