Exactlyfoilholio wrote: ↑Fri May 26, 2017 1:28 amWow ok, you not only came up with an awesome new mixer, but you have rearranged the bridles massively at the tips! What I can see you have done at the tips is basically move all the bridles forward -> on the mixer. So B->A@Mixer C->B@Mixer Z->C@Mixer, you then don't connect to Z on the mixer with the tip bridles, and you also have removed some of B at the tip, B5 and B6.
Yes, V1.1 is my test bench for that.foilholio wrote: ↑Fri May 26, 2017 1:28 am
The effect of all this will be lower ratios for the kite at the tip. So the center of the kite is 432, the tip becomes 320 compared to the center. This should make the tip more stable and reduce bar pressure! Now the really interesting bit, I think this is what the new Flysurfer Sonic Race has setup on it. So you are really onto something! I think this type of bridling helps resolve a long standing issue with foil kites (or foils with quite a cord change on the span) where the tip is pulled too much compared to the center and stalls early, or becomes unstable.
The reduction of profile depth from center to tip will increase the the angle at a given barstroke generally.
But the supliers handle this problem by implementing aa additional gear:
Bar throw is implemented 100% (direct) at the center of kite, but reduced by cos(alpha) at the tips.
alpha is the angle between vertical and the line supplying the tip bridle.
When this all (profile depth, connection points, angle effect) doesnt match, the kite produces tip stalls.... Hmm, sounds complicated.
By implementing z5678 at C I use the advantage of backweigthed mixer (Here I have 75% gear, standard mixer hasent) AND because backbend tension lines look cool! (.... just kidding)
Had some thoughs about that too, but I think market acceptance could be a problem.foilholio wrote: ↑Fri May 26, 2017 1:28 amA small idea I just had thinking of the 3 pulleys on the Sonic Race you could ADD an extra pulley back to the front of the mixer. This pulley you could use to drive B at the tip, giving you 321 at the tip. So basically the mixer would have 4:3:2:1 ratios. You could even then divide the kite up further and have say 432 at the center then 321 then 210. Interesting. All this should make new kite shapes possible, especially with more taper on the span, i.e. smaller tips.
But as FS starts with this, well see.
A8 +7.5, A9 +7.5 (correct), B78 - 12 (added this info in post a minute ago), Z5678 -12 (correct)foilholio wrote: ↑Fri May 26, 2017 1:28 amI am going to sum up the changes you have made so far, to check I understand them correctly.
12m A15 V1.0 Kiter_from_Germany Mod (all units cm)
@the kite. A(Amain)+40, Z(Zmain)+20, A8 +7.5, A9 +7.5, Z5678 -12
move z5678 to C (main), move c78 to B (main), move b78 to A (main), remove(delete) B5,B6 and B56.
@the mixer. Swap pulley lines to change ratio from 421 to 432, added 35cm long adjustable B and C (mains).
I guess they are in addition to the existing B and C (mains)?
The settings for the mixer are A0,B-1,C0,Z0 or just B-1?
But this V1.0 mod results in the swept tips (they are stable but not parallel which brakes a little
Mixer Result is the same than in V1.1:
A: 0 (Reference Point)
B: 0 (-1 ... +0,5 for trim reference)
C:-3 ( Trim against a nicly engaged Z1234, when powerd Z should double bend compared to C = trim ok. Start with C trim)
Z: -20 (Is true - we get rid of loose Z. Important: Z5678 is connected to C otherwise this wont work!)
To avoid this: just important remark: By rearranging the mixer you have to change B and C line. C will be the new B line.
C material is not capable to handle this. You have to refabic it. My actual suggestion is to prepare "C+mixer_C" and "B+Mixer_B" lines from high quality lines 300kg, for example Liros DC 300. The new combined lines should be 60cm longer than there original replacements to prepare the aditional mixer length.
From here I just comment your text:
18m A15 V1.1 Kiter_from_Germany Mod (all units cm) (correct)
all the same as 1.0 except A8 +12, A9 +12, (correct)
no shorten of B78, z5678 (this is the differenc to V1.0 they stay at original length)
Mixer settings are A0 B0.5 C-3 Z-20 (correct)
Optional can leave z5678 connected to Z but will need a 17-20cm extension (expected)
Gonna recheck my post this weekend - to get my errors out. Thanks for hints.
Reverse start: No problems with that, cleanly and easy reverse start.
Last remark: I gonna make a vid from that - I just have to resplice some lines so that they look understandable, when im hovering along my kite with the camera, describing what to do .... all takes unfortunately a little time