Lord help me, here I go again...foilholio wrote: ↑Thu Aug 04, 2016 5:34 pmStand on the front main or line and pull the B main till it is fully extended or fully depowered. When like this measure from the top of the A main to the top of the B main, 2 of the bits you line up in a mixer test. It should be 25cm because it is a 421 mixer, C SPL is 100cm and 1/4 of that is 25cm. You can make it slightly longer if you want to compensate for upper bridle shrink . If you want to adjust B shorter in the profile say to make it more stable but maintain full depower, just add that to you calculation. Any shorter than 25cm or even at 25cm considering the upper bridle shrink, will be more stable depowered than standard. Generally though you can always pull on a bit of bar if you need more stability, that is though as long as the profile is set right or that way.
Oh aswell, if you can observe your bridles and Z is always slack even with the bar in, which seems common for flysurfers, try loosening C while keeping B level in the mixer test. This will allow the kite to possibly be more stable while also allowing Z to tension and camber more giving it more lift. Maybe not the best upwind but it is more how they are when original. Understanding B and C better has been quite enlightening. Merely looking at the mixer producing AoA or a complete profile with ABCZ is wrong I think. A majority of change is merely A and B. If C or Z come in too early you get stability problems. If B or C come in too early or Z too late you lack lift. The setting for best L/D is not the best for lift or stability but it is more stable.
25cm would be if I remember correctly to make sure the depower amount is correct when the mixer is at full throw. If you are using B C to compensate for other things you may go outside that. For example you had 2cm B shrink above the mixer you would need 27cm of depower throw to get full depower. You can possibly run out of too much power range doing such things though and affect reverse flying i.e. relaunch. more of a big kite problem though.
If you looked at the threads first page you would see
It is and good.
Well you may have missed the mixer test to level things out again after you do the Z mod, that keeps everything the same except you have now more depower. The only real obstacle you can run into is you run out of C adjustment and then need to make C extensions which is quite a bit more work than just the Z mod. You can also run out of trim at the bar, moving the pulley line position changes the sheet position of the kite at the same bar position.
Well nice to know you know it's there
There is two separate problems and this thread is trying to highlight the unknown and until recently unacknowledged problem( flysurfer has now mentioned it in a video), that is that when the pulley lines shrink they limit depower and a mixer test or even a long mixer test won't fully fix it. The long mixer test accounts for changes in the bridle above and at the mixer. It can either make the depower better or WORSE! and now I think about it, it is most likely to reduce depower even more. If you align A and Z at the upper bridles near the canopy, the effect because Z shrinks the most is the mixer will move to a more depowered state and you could then find yourself shorten B even more at the mixer to get ABCZ to line up at the upper bridle canopy. End result even less depower. but remember they are separate problems you can lengthen Z and still do the long mixer test or standard mixer test. You would be best to do a long mixer test first so you can then calculate the correct amount you need to lengthen Z and then repeat the long mixer test..Kamikuza wrote: ↑Wed Apr 18, 2018 3:20 pm
Gunnar's method and video makes the Long Mixer Test clear up to the point of setting Z the same as C -- why? Why even 2x C? Why wouldn't you set Z to the difference it should have been in the line plan?
For example, for the Speed3 15: A-B 8.9cm, A-C 25cm, A-Z 36.5cm... that is A1+A-main, B1+b1+B-main etc.
Zero the mixer. Add pigtails to return the differences to those above; surely that's a perfectly zeroed (blue printed? line planned?) kite?
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