To whom it may concern!
Revisions:
Due to the evaluation of this new setup of panshs a15 I gonna change this text always to the best result. Here you find a revision indication with a short text what changed:
1.1 - Tweaks for a15 in 18m and better tweak regarding tip connection (v1.0 tweak led to positive sweep of tips instead of parallel) This tweak is better and works general
1.0 - Original text
Actual Text:
Good news in setting up my panshs a15 (in 12m and 18m).
After fiddeling a lot I finally managed to make pansh a15's work for me with a regular bar.
I gonna document what I did here but to say what I did some informations first:
Summary:
a15 has a great canopy which is a genious fabric with lots of ideas.
Unfortunately the bridle system they supplied is not working well in relation with its kite design.
This mismatch leads to (in my view) horrible bridle setup and a looong depower stroke of more than 1m (front- to backstall) and a mostly useless Z bridle at a15 in 18m.
My fist attempts to solve this problem was to double bar throw
by using special mixer setups like
malabar or
funalex - both principally working - but with negative side effects (no reverse start possible) and so.
I finally came up with the 2:1 bar, which doubles bar throw virtually so for me being able to go on the water, handle this mega depower stroke and have a little fun (->
https://www.youtube.com/watch?v=tDRDpJXdzTg)
Interesstingly pansh website referenced my video with 2:1 bar - incredible... obvious without asking me in advance to use it - thats pansh!
So I permitted them after finding it out..
)
But I dislike 2:1 bars and I always was disappointed about this loose Z linke thing.
Myfinal goal was to make a nice kite flying with a regular bar - ready for water, and gusty winds!
Short things short - I rearranged the bridle system and "invented" an - in my nomenclature - "backweighted mixer". This is working 0 : 1/2 : 3/4 : 1 instead a regular mixer which works 0:1/4:1/2:1. This means a doubled B and increased C stroke and a functional reverse start option by NOT effecting A and Z!
BUT BEWARE: This works because of the special design of panshs A15 with a B position of connection points not as 25-33% of profile depth instead of nearly 50% of profile depth in reality (center of kite).
Let me show you how i rearranged the bridles:
In the drawing you find my try to show you the real connection points which are different from the original Lineplan of pansh on website. Do you see, that center B is nearly in the middle of profile?
We gonna take advantage of that.
The thing is, we have to find a bridle setup which is better but not so aggressive that the kite gets instable.
So main point here is to get a better relation between bar throw and depower of the kite.
Take a look on the mixer - it is "backweighted" now - find the difference!
)
Stability of the kite led to the requirement that the tension lines always have to be straight or back bend. You see - with the connection points supplied (at least in my in my generation of pansh a15) this is the case (I marked the tension lines in relation to the bridles) , we just combine the connection points another way than original.
1st Advantage: We get a good bar throw "stall to stall".
2nd Advantage: through rearranging the bridle system in the way shown the stability of kite gets better. A first video, where I let sit the kite on the ground at the edge of wind window -> not collapsing <- is shown in vid sniplets.
12m (swept tips V1.0) ->
https://www.youtube.com/watch?v=TfYh_hkxfOI
18m (swept tips V1.0) ->
https://www.youtube.com/watch?v=eoUfFyuEqZU (stable even with some slight errors in ECL trim lines, you can see at the tips)
3rd Advantage: We can get rid of this loose Z line thing an improved agility because of that.
4th advantage: Better mixer design good for kites with high profile depth (low AR)
5th Advantange: Less air flow during power/depower actions of the kite.
By connecting the bridles nearer to their geometric needs the kite profile, it is not bend so much during power / depower. This leads to the fact, profile stays the way it is and the air stays inside the kite.
The interesting thing is: Last generation of kites made a feature from that, That time they named it holy grail!
Unfortunatels the drawback is, that the profile has to refill air for a few secondes after hard power/depower movements. FOr exp: starting procedure - Effect: upstorke is "hanging". His is not good. Look at the speed 5 best maschine ever - a bridle setup like speed 1 again!
6th Advantage: After tweak you have a
mixer trim for B and C (don't know why pansh dont does it by default.
The next days I gonna show up with a vid being out on the water - hopefully the weather is good for that.
Lineplan and splicing plans and rearranging procedure will follow next days - here is some info, nevertheless:
It is pretty straight foreward - most things are prepared by rearranging the sleeved lines together in a different way.
Add some spliced pigtails here and LCLs there, the rebuild was recalculated last weeks to make it handable without destroying original parts to make it reversible.
All and all an effort of good 3h when you know whot you are doing...
For Documentation: Line Lengths (Beware: these are the original measured line length supplied ) This is just for documentation!
The
modifications are below that:
a15 / 12m:
- pansh_12m.png (15.75 KiB) Viewed 2892 times
a15 / 18m:
Modifications here pansh a15 in 12m (swept tips V1.0):
Installation:
Splice Pigtail between: and:
20cm YZ Z
40cm AXY A
Modification Mixer From: To:
0:1/4:1/2:1 0:1/2:3/4:1
ECLs 7,5cm a8
7,5cm a9
Splice Line
-12cm z5678 (new is just shorter than original)
-12cm b78 (new is just shorter than original)
Splice Pigtails
40cm Trimline B DC300 (start with line 60cm before knoting)
40cm Trimline C DC300 (start with line 60cm before knoting)
So you make the knots (top: knotted mixer line, botton: mixer pigrails, prepared):
Look at the mixer knots (with the rings) These are two possibble trim positions ("standard" and "race", "race is a flatter profile . The mixer trim positions I list below are the "standard" positions). Dont use the second knot for now. It seems to make sense only on B line and would be 3cm higher than standard, which would result in a profile 1,5cm more flat.)
New C line Original Length but stronger DC201
Starting Point for mixer Trim (a15 12m) :
Starting Point Mixer Trim for a15/12m (standard mixer Test)
A fix 0 (refernz point by definition)
B Trim: -1cm (trim me!)
Modifications here pansh a15 in 18m (parallel tips V1.1):
Installation:
Splice Pigtail between: and:
20cm YZ Z
40cm AXY A
Modification Mixer From: To:
0:1/4:1/2:1 0:1/2:3/4:1
ECLs 12cm a8
12cm a9
Splice Pigtails
40cm Trimline B DC300
40cm Trimline C DC300
So you make the knots (top: knotted mixer line, botton: mixer pigrails, prepared):
Look at the mixer knots (with the rings) These are two possibble trim positions ("standard" and "race", "race is a flatter profile . The mixer trim positions I list below are the "standard" positions). Dont use the second knot for now. It seems to make sense only on B line and would be 3cm higher than standard, which would result in a profile 1,5cm more flat.)
New C line Original Length but stronger DC201
Starting Point for mixer Trim (a15 18m) :
Starting Point Mixer Trim for a15/12m (standard mixer Test)
A fix 0 (refernz point by definition)
B Trim: +0,5cm (trim me!)
C Trim: -3cm (trim me!)
Z fix -20cm (check should be acheived by line modifications)
Reconnection of Z5678 may not be neccessary for good function (it may not be neccessary to connect it to C bridle.
But if you let Z1234 together with Z5678 pls. put a seperate pigtail of 10-12cm between Z and z45678
I check this in a next riding session (4 weeks?)
CU