Hpr wrote: ↑Mon Jan 22, 2018 7:34 am
Don't you adjust the trim (or angle of attack is probably more accurate) every time you move the bar by simply changing the length of the back versus front lines? So whether you have a strap, cleat or other system on the rear lines (or front lines on some of the newer bars) or moving the bar itself it's really the same thing. In this context, talking about having a 'short trim range' and 'trim system is largely redundant' (because of the 'short trim range') and then saying the kite has a huge depower throw doesn't make sense to me.
Anyway, my point remains. Without a trim system you will need to have the bar at different positions in differing wind strengths (for the same pull or sweetspot).
Well yes. The strap/cleat/whatever simply offsets the same relative trim (AoA) position to being closer or further away, for ergonomic purposes.
So when I talk about a short trim range, my C2 17 needs about 20cm to go from fully powered to 90% depowered. I normally use about 5cm of that, i.e. 100% to 75% power at 10k, 75% to 50% at 12.5kn, 50% to 25% at 15kn, 75% to 90% depower at 17.5kn. Let go of the bar and it goes to 99% depower at 60cm of trim.
All of this is completely within my comfortable range of motion, hence I don't use a trim strap.
Whereas my pulley bridle 5 strut 11m, needs about 3 times the range on the control bar. So for this kite I would use a trim offset system (Z-rig).