Is there anyone who has a good idea of how to shorten lines on a trainer kite?
I have a 3m kite which I must use on a windy day that is coming soon. I´m thinking that it should be possible to shorten the lines somehow rather than taking a smaller trainer kite with less good aerodynamics.
I do not recommend doing a teaching session in high winds. And definitely make sure you do not give a 2.5m kite to a person under 55kg (125lbs) in high winds. I had one of my students try to teach his son on a 2.5m in high winds and his son got beat up pretty bad. After that, his son never wanted to fly the kite again.
But my main reason for not teaching in high winds is that the student learns almost nothing. With a first session in high winds, then moving onto medium or light winds, the student has no skills to cope with those lighter winds and gets frustrated. This is because light and medium winds require you to keep the kite off of the edge of the window by working it. High winds never teach you how to work the kite.
For the best skill development, go out on a few days when you actually think the wind is border-line not enough. Getting the kite up, and keeping it up in these marginal winds teaches more than you could ever learn in high winds.