tilmann wrote: ↑
Tue Jun 18, 2019 7:31 am
When you watch racing today there is a permanent working on the bar: depower ... power ... depower ... power and so on. That´s wrong.....
This statement is wrong in 3 ways
1. If the kite is in one position, not sining, then yes, you are correct (so long as you are not changing course or encountering turbulence). If you are sining the kite even a tiny bit, you are changing it's position in the wind window and you must sheet for maxim lift from the foil section.
2. If you change course, even small upwind or downing changes to go above or under a racer in front of you (or to yield right of way), you DYNAMICALLY change the position of the kite in the wind window. This also requires sheeting. Since kites need a bit more room (not as much as you think) than windsurfers, more movement results in more sheeting.
3. Hydrofoils (if we are talking about racing), are sensitive to sideways pull and often times the kite must be depowered on a gust or turbulence in the wind. This, again, effectively changes the wind window and sheeting is necessary. While a rider can compensate for this with inputs to the hydrofoil, they can also compensate for this with inputs to the kite. Thus some approaches rely on sheeting the kite.
These factors can be reduced in higher winds as power (difference in velocity of water media vs air media) increases with wind speed. Apparent wind is typically referenced more in this situation since the wind is smoothed out by the forward motion of kiter.