i dont think ar or shape flat wide thin whatever none of that matters much what matters are two things, 1) how much kite you have above you 2) decent jumping ability, doesn't have to be great just decent. The more kite the longer your hang time....
Well, again, no flamewar, but just a few thoughts...
a) ANY "big kite" just wont work. You can rida "foil\HA" kite in size of 18m on up to 25knots (Well, Toby can do this on his weight\small board). But im quite sure that 18m size Vegas or 18m size RPM with rip Toby apart on such wind and sent him (or any other imaginary kiter) to the downwind on a ultimate pace.
b) Your idea (if i get it right?!) that "shape doesnt really matter, but only the square meter\size does" is quite un-proved & lacks of explanation:
1. You can sounds the same way if you say that "no matter where you have 5.0L engine... on a Ferrari F50, on Toyota Pick-up or on a School Bus - they all move\accelerate\stop\pull the same
No they are not. They have "same\big size" - but they are so so different.
2. In the first post on that threat there is a basic "aerodinamic explanation" of why HA\LA kites do what they do, what cons\pros they have & why....
"Aspect ratio refers to the lift
of the kite.
For low\moderate aspect ratio kiteboarding kites:
...it has more power in lighter winds for its size since it flys more downwind of the pilot.
Jumps tend to pull you downwind rather than upward higher loftier jumps. The kite will provide more of a yank downwind rather than a upward lift straight up.High aspect ratio kiteboarding kite:
...A high aspect ratio kiteboarding kite will fly far into the wind so the effective "edge of the window" is further upwind.
It can also produce higher jumps as the kite is further upwind when you send it.
...Also, it slightly more manageable on the upper limit of its wind range than the Element as you can send the kite further upwind and thus reducing the kites power."
Again, with all respect. But i refuse to take you "Its only a size that really matter" theory.
Otherwise there will be a lot of Freestyle champions on "foil" shaped kites..... and also a lot of people who will win course-race championships on a 21m North Vegases.
What other theoryes you have - That you can go upwind on a 18m Vegas with a 145x45cm board on a 25 knots?