Ok, I will only try to give some tips for the people who wants to learn how to loop a kite.
I am not a pro, but I have been looping kites for 4 years now, and my favourite sessions are 40 knots, 7m c-kite, 20m lines and throwing megaloops.
Until I really learned how to do them properly, I had 3 injuries during these years, because it is not a trick you can fail in hard conditions, and because it is a trick that nobody really explain in a detailed howto, or in most cases, explain in wrong ways (some people think that a kiteloop or megaloop trick is only steering the bar)
Once you master it, the risk decrease a lot.
So, to minimize the pain of learning stages, I will try to give my personal tips (I would appreciate them if somebody had told them to me in the beggining):
GEAR:
Type of kite: C-KITE, or hybrid kite that loops good (not all the kite loops good, even not the same kite in different years loops the same).
Kite size and lines: 7m better to start with loops in my opinion, but with less than 27 knots to avoid injuries.
Proper wind to learn: 22-27 knots.
Proper wind to throw big loops: 27-32 knots
Proper wind to megaloop: more than 32 knots
Meters of lines: 23-24m (take 20m when you will master the loops, not before)
Proper way to learn before make a kiteloop: master your kite behavior, make surface downloop transitions to know the loop behavior of your kite, etc...
WHEN START THE LOOP:
- A tip that I always hear and makes me nervous...
NEVER START a kiteloop in the highest part of the jump (kite needs tension in lines to return to the zenit, so if you look all good kiteloops or megaloops, in the highest part of jump, the kiteloop is already in its lowest part (half loop done))
If you start the loop in your highest position, the tension of the lines that made you go up is not there anymore (you are not going up anymore, you are at the apex!), so when you will throw the loop, the kite wont have tension in lines, and will not recover the zenit at time and will not catch you before you crash your bones to the water!
You have to start the loop in any moment BEFORE the apex, to take profit of the line tension. If you are doing it right, you will see that in your highest point, the loop will be at his lowest (half loop).
WHERE PUT THE KITE TO START THE LOOP:
If you master the loops, you can start the loop in any position between 30º (angle between water and lines of kite) and the zenit.
But, if you are starting to learn them, always start the loop at 12 (zenit) (and, in any case, doesnt stop the loop until it do the entire loop, in any case!).
But here I have to explain a little better: when I says 12 or zenit, I mean 12 just above yourself! doesnt start your jump putting the kite from 45º! start the jump with the kite at 11! with a correct pop and good wind, from 11 to 12 is good enough to throw a proper loop.
Important tip: think about that... in the position where the kite is when you start the loop , is the position where the kite will finish the loop... so if you are not used to make the pendulum at high speed and throw a second loop to make a good landing, dont throw a low kiteloop! try to make the softer pendulum, and this is throwing the kiteloop in the highest position (almost as an heli loop).
So for first kiteloop attempts, throw it at 12, jumping from 11, and throwing the loop with the turning radius the most narrow or closed you can (I will explain that later).
HOW TO THROW THE LOOP:
In the moment you decide to throw the loop, you have to do it with full comitment! Think that if you dont finish the complete loop, the crash is hard, this is not deciding in the last moment to stop a sbend and crashing...
So, in the moment you decide doing the loop, take the bar down all the way (only pushing down the bar, not steering any side of the bar, to assure the bar is all the way down) (in fact you already have to have the bar down beacuse you had jump from 11 to 12) and just after steering as much as you can the side of the bar.
Tip: if you make the loop jumping to the left side (with the right foot in the rear position), a useful tip is to put the front hand (left) in the middle of the bar, and the rear hand (right) in the extreme right of the bar. This will make the turning radius the most closed way (be careful when you jump because if you are not used to, you will steer the bar to the right just leaving the water).
If you dont push the bar all the way down before steering the right way to make the loop, you may not finish your loop and crash!
Later, when you master kiteloops, for megaloops, you can control the force of the steering to make the circle wider and loop the kite at the same height than you... but this is not a good tip for begginers, sorry.
IMPORTANT TIP: just when the kite finish the loop and looks start pointing to zenit, release the bar all the way up and you will see the kite start moving again to the zenit (or the direction you had stoped the loop), and catch the bar all the way down again to soft the reception before landing.
HOW TO LAND A LOOP:
Main tip: learn how to land high jumps (or normal ones) with a downloop. Learn how to control the momentum or the pendulum, making a downloop to do the landing and continue riding away.
Ok, now you should know how and when to throw the loop, but when the loop finish, what we have to do?
In first kiteloops with not much height, this is not so important, you can finally steer the kite left or right just before landing, because you dont have to throw a loop in a height that you could not land it without the help of the kite (22-25 knots and a 7m), and your downwind speed wont be too much, your kite will be out of the window droping while you are going downwind in the landing, but you can do a downloop with the kite out of the wind window to have it in again, or edge your board and get tension in lines to control the kite before it falls down completely.
If you start to throw loops with a normal height, you will have to resend the kite after the loop to the zenit to take profit of its vertical force to soft your landing.
But now it appears the difficult tip to explain: what should we do with the kite once it is at zenit again or once we make the landing (normally with a high speed downwind...)
So, making the same exemple than before, if you are jumping to the left size, and make the kiteloop to the right, you will normally finish your jump like a transition (for that reason is a good thing to master the downloop landings (except if you had not make a strong pop and the horizontal left speed you had win against the loop horizontal right force, so in this case, you will have resend the kite to zenit and throw just before landing a second loop in the same sense than the first one (to conserve tension in lines, because you are landing to the left, not to the right like a transition).
So, lets put a normal case of a big loop now. You go left, throw kiteloop to the right, and you have make a good pop before jumping (this would stop a little bit your left horizontal speed and increase tension in lines to make a good take off, this will makes you go higher too) and you land to the right, like a big transition jump (a kiteloop or megaloop is finally the same than a transition jump, but with a momentum and increased downwind speed due to the loop).
Lets continue, you jump, you can send the loop from 45º if you are in high winds (35 knots or more) loop the kite, release the bar, and now this is the key tip!
KEY TIP: if you are making a big loop, the kite will catch the zenit before you catch the water, so you have to resend a second loop. For that reason we will resend the kite after the half loop, but not to the zenit. We will resend it a little bit to the right (in this case of transition jump = jumping left and landing righ size ) and WAIT (this is not an easy part when you are learning megaloops) until the kite will be above you or even rear you (this will decrease you downwind speed) and make an heli loop or downloop just above you (this will help making the vertical kite force to make a soft landing.
Extra info: for megaloops, a key tip is the speed you have before jumping, go as fast as you can, while you can control and do a strong pop and strong tension in kitelines! Enjoy Kitelooping!!!
Lol... I just wanted to make some simple tips, and I finally wrote a book. XD
Sorry, but it is a little difficult to explain this things.
I hope you will find this text useful
I let you a video to finish the explanation: