Just had crazy argument with my friend about it, so need some advice from you, folks
When you pop with kite steady at 45°, you have different forces, that give you height. I think they are:
1. Pull from your kite
2. Pull from stretched lines
3. Push from your legs
4. Small kicker from wake under your board
5. Your body as spring, that contracts and extends
These forces all together give you height. Question is which one is biggest? Specially when you jump like 2x body height.
Aaaah - interesting
2. Nope - they will most likely stretch less than 5-10cm, which would be the max benefit in height then.
3. Yes, although quite limited as humans are not able to jump more than around 1m up.
4. This is the "pop" (the wake gives nothing IMO), will describe below.
5. To a small extent, yes. Would not call it a spring, but you can lift your bodyweight with muscle work.
Of course redirecting the kite will give by far the most amount of jump height
But if there is no "spring effect" in the lines, how come you can pop with kite parked ?
Three reasons - the obvious is the body work as you can make a (very) little jump, even without the kite.
But the primary is, that when you pop, you actually change direction and head upwind, you and your board.
When you do this, you slow your forward/halfwind speed down and upwind instead, and you also change direction so your speed is higher to the wind.
BOTH of these factors will increase the AOA on the kite, thus the kite will lift more
For those curious: Try to draw the vectors wind speed and rider speed, and see what happens to the AOA if you change direction
So it is not the same as a stiff wire cable park jump, as when you pop with a kite, you actually increase
the lift just like if you had pulled the bar in.
Third and last, you get a little pendulum effect too, just like you do on a cable park.