dave...... said..dbabicwa said..
Go back to school. You forgot about the wind in your diagram which will cause uplift (or side lift in your piccy). .
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Your diagram shows you have no idea. You might know the "how", but no idea on the "why". Please dont take this as a personal attack, you have missed some of the key fundamentals.
Thanks. The pic demonstrates how it looks like when you hold a kite straight in the air, vertically. Try to narrow the kite holding it on a tip.
If you tension a "longer" line ("longer" side of a "triangle"), the kite will push the helper on a left side because the air pressure will shift down causing uplift on the lower side.
If you tension a "shorter" line, the kite will bend above the holding point coz the pressure shifted on upper side. As seen many times.
Only when the lines are of equal length meaning the kite is slightly put under angle you can launch the kite. Agreed?
This pic has nothing to do with the lines but the distance. It is impossible to launch a kite from this pic...Only if you narrow the bar drastically you might (yes, from experience, read below). Basic geometry, not trigonometry or triple integrals.
I've actually did the above once by a mistake. One steering line was shorter by 30-40cm, yes 30-40! And ridden it for 1 hr. Every single turn was a almost a loop. Try it...
It's interesting how raising this question raised so many red thumbs. When someone can actually die or be badly injured it sounds like the pilot is to blame. For the helper holding a kite tip or tripping over.