Control bar for t-foil trainer kite

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superlizard
superlizard
VIC
702 posts
VIC, 702 posts
18 Dec 2006 5:59pm
Hi,

I'm seeking a bit of advice on putting together a control bar for a trainer kite. First i appologise for a long message. Basically I'm very keen on getting into kite surfing, and planning to start lessons later this summer. So far i've been learning using a 3m (4 line) trainer foil kite with handle bars on land using a dirt board. Recently i upgraded to 5m trainer kite (also 4 line). Obviuosly this thing had a lot more power, so i was keen on trying it out with a control bar, however i don't have money right now to buy a new bar (and i don't want to buy just any old bar), so i tried making one my self out of strong wooden rod. I made it 60 cm wide, and made a hole in the middle. I measured everything the best i could and attached leading edge lines to each of the bar edges. I then attached the brake lines to the central line which i led through the bar and used it to hook it into my harness.

The bottom line is that i was able to launch and depower without issues, but stearing didn't work at all... which ever way i moved the bar, the kite was behaving irratic and turning in circles each time different direction. WHen i use separate handle bars, i normally steer by pulling one handle down in which case both leading edge and brake line from one side of the kite go down... however with a control bar both the brake lines are always the same distance, so i'm curious if this is what would make kite behave unpredictably?

Any advise/tips would be greatelly appreciated. I.e. what kind of bar would be ideal for a land boarding foil kite?

kitecrazzzy
kitecrazzzy
WA
2184 posts
WA, 2184 posts
18 Dec 2006 4:07pm
lines the wrong way around-LE lines go to the middle of the bar
superlizard
superlizard
VIC
702 posts
VIC, 702 posts
18 Dec 2006 6:22pm
Please forgive my ignorance as i'm still a newbie, but i though that when letting the bar away from you means depowering (stopping the kite), - which is achieved by lowering the back edge of the kite. So if the leading (front) lines are goind through the middle of the bar attached to you, won't that actually work opposite when you push bar away from you? Also i've seen some examples on the net that show the leading edge lines attached to the sides of the bar.
I could be wrong though. So does pushing the bar towards you is supposed to slow down and brake the kite or opposite?
captainkaos
captainkaos
WA
247 posts
WA, 247 posts
18 Dec 2006 10:25pm
center lines connect to leading edge as kitecrazy says.lines connected to ends of control bar go to trailing edge.when pulling bar to your body you will power up the kite because you are pulling the trailing edge down to hold more air.pushing the bar will raise the trailing edge allowing air to pass.definately this is the way for inflatables,but i havnt had to much to do with foils but im sure the trainers i have seen are the same line set up.someone will correct me if im wrong

kitecrazzzy
kitecrazzzy
WA
2184 posts
WA, 2184 posts
18 Dec 2006 10:42pm
attach lines to the rear lines so if you release the bar (unhook and let go) they go really short, its complicated for me to explain as i am 100% inflatable but it should work sort of like this

put a sheath on each of the rear lines about 10cm long max and tie a knot in it on the lines about a meter from the bar. now connect lines to these knots that pull in the knot towards the bar and pass through eyes on the end of the bar (corresponding side to the line) now tie the two lines together with another eye on it, clip your safety leash to this.
the effect is that when your hooked in these lines just run up to the knots on the rear lines but when you unhook the bar runs up the lines to meet the knots.
now before using this take it to some one with experience on foils to look at and make sure its all right.
put a stopper balls on the two lines running through the bar so you can adjust the amount of line it pulls in because to much will probably make it invert and too little with kill you or something
anyway put a quick release on everything
tobes
tobes
NSW
1000 posts
NSW, 1000 posts
19 Dec 2006 12:58am
Hahahahaha!
You can get some really bad advice around here if you ask the right question.
Superlizard, your homemade bar sounds like pretty much the right set up. I have a Flexifoil Bullet on a bar, the front lines go to the bar, the rear lines are basically just a safety, connected to a wrist leash. If your kite doesn't fly well only on the front lines, I'm not sure what the problem is.
Try it on the bar, with no tension on the rear (brake) lines.
Crazzzzy and CapnKaos have described the setup for inflatable kites and foils with a depower bridle. Nice try fellas.
good luck!
kitecrazzzy
kitecrazzzy
WA
2184 posts
WA, 2184 posts
18 Dec 2006 11:07pm
he didn't actually say what kite he had though but he said his kite is de powered by the back lines even though we dont know what kite it is it sounds like a flysurfer style kite, hell he could have a inflatable that hes trying to depower with the back lines but considering he said 4 line trainer foil its pretty easy to think its a fly surfer thing
tobes
tobes
NSW
1000 posts
NSW, 1000 posts
19 Dec 2006 1:20am
Fair enough crazzzzzzy, infact it sounds like he's already set it up like a typical open celled foil and that didn't work well, so your set up might actually work. You can steer a foil with the brake lines alone. As said, safety first if you're gonna hook yourself up to the power lines. A 5m foil can be as powerful as a 12m C kite.
I can't really explain why it doesn't fly well on the front lines, maybe its just crap?
superlizard
superlizard
VIC
702 posts
VIC, 702 posts
19 Dec 2006 10:57am
Guys thanks for all the advice. I guess i learned few more things from your responses. The kite i have is the "Feed the Rat" foil trainer kite (not inflatable). I bought it brand new from RPS in Melbourne, and paid 420 for it. It keeps (more or less) the flat shape when in the air, and flies very well with separate handles. I guess i might pop down to the kite store and run the setup by them to double check, given all the different suggestions.

But thanks anyway.
Macca Wollongong
Macca Wollongong
NSW
295 posts
NSW, 295 posts
19 Dec 2006 11:05am
Man, these guy dont have much foil exp.

You can conventionally rig a 4 line foil with depower like a waterkite, they need complecated bridle like the FF Sable or the Ozone example.

The foils have brakes on the trailing edge, an these are used to slow the kite, it doesnt depower it just slows it down, now when a water kite depower it acctully changes the angle of attack to depower, which cant be done on your foils.

So baiscally for a bar setup what you should to is connect your front lines to the bar, the brake lines thru the bar to your safty leash, and attach the harness loop to the bar. perferible a harness leep with a quick relese.
superlizard
superlizard
VIC
702 posts
VIC, 702 posts
19 Dec 2006 11:26am
Thanks Macca. What you suggested makes sense and that's what i've tried doing more or less. I guess then the next question i would have is if it's possible to steer the foil with LE lines only? Because when i launched the kite and pulled one side of the bar towards me (which was in essence pulling only the leading edge on one side), the kite behaved differently each time... sometimes it didn't react immediatelly, sometimes it was turning around it self in opposite direction, etc. It was crashing down, sometimes up side down as well. The launching and slowing down worked ok though...
Macca Wollongong
Macca Wollongong
NSW
295 posts
NSW, 295 posts
19 Dec 2006 1:33pm
in essence it should work fine, your doing the same with the handles, your only appling brake when you tilt your hands backwards with handles, most foils fly a lil better on handles, but it shouldnt be flying as bas as you say, try the handles again to make sure you havnt accedentley changes the bridle, Oh and with the brake lines on the bar make sure there is pleanty of slack in them, foils with a bar only use brake lines for relaunching and safty, they dont acctully have tention on the back lines when flying.
tobes
tobes
NSW
1000 posts
NSW, 1000 posts
19 Dec 2006 1:43pm
Yep. Slack brake lines to a wrist leash, front lines to the bar. I hope the hole you drilled through the middle of the bar hasn't weakened it too much. This set up is similar to kiting unhooked, both power and steering through the bar.
superlizard
superlizard
VIC
702 posts
VIC, 702 posts
19 Dec 2006 2:55pm
Thanks guys, i'll give it a go again...
VIC, 203 posts
19 Dec 2006 3:57pm
Hi Elvis

Put the back lines to the middle.
Make up a small length of rope/line to run thru the middle and put a pulley on it towards the foil and a stopper or preferably a leash on the end near your stomach.
Pop down to the beach at St Kilda and you will see a dozen feed the rat kites all flying on bars.Any old bar you can get tyour cands on works fine. You need a Y yoke with a pulley so the brakes can swivel to keep the kite in shape. It distors otherwise and folds a wingtip.

Go to my website and email or call me if you have any grief and I can run you thru it. The FTR kites do fly well on a bar as a trainer. I can send images if you need!

Cheers John
waveslave
waveslave
WA
4263 posts
WA, 4263 posts
19 Dec 2006 2:01pm
quote:
[i]Originally posted by superlizard

The kite i have is the "Feed the Rat" foil trainer kite (not inflatable). I bought it brand new from RPS in Melbourne, and paid 420 for it.



lol
Are you insane superlizard ?
You paid $420 for a toy kite and you didn't get a bar ?
Oh my God.

Why didn't you put that cash towards a real kite ?
Or lessons maybe ?
(I can't believe I suggested paid lessons).

At least lessons would give you some rigging knowledge.
You would then know how to string your Freddy Flintstone bar that you've fashioned out of wood.
Wood or carbon fibre tube....
A bar is a bar.
It will work if rigged correctly.

A bar is really just a stick with lines attached.
That's what makes wavekiting so cool.
Riding waves just holding a stick.
No fat arse sail rig in-your-face.
It's freedom on a stick.

But back to your custom wooden bar...
The hole that you've drilled thru the centre could make your bar suspect ?
It depends on the size of the hole,
the diameter and type of wood,
and the power of the kite.
The bar might snap.
You may have made a dud.

But back to my second question...
Why didn't you get a real kite ?

A real kite would actually teach you something about kitesurfing.
A real kite would allow you to fully respect the power of a kitesurfing kite.
A toy kite teaches you how to fly a toy kite.
Pull left, kite goes left.
Pull right, kite goes right.

But back to the wooden bar again...
It intrigues me.
For instance,
If I was camping at some outback in-the-middle-of-nowhere secret NW wavekiting spot...
And I somehow lost my only bar,
But I had spare strings, ropes, fittings, etc.....
I would probably fashion a wooden bar myself, out of necessity.

The stick would need to be strong bushwood,
about 40cms long,
with knobs at each end for winders,
and conveniently have a knot(wood knot, not rope knot) in the middle that I can poke out to make a hole.
(No drills in the rough outback).

It's bush kitesurfing.
Termites could be a problem though ?
superlizard
superlizard
VIC
702 posts
VIC, 702 posts
19 Dec 2006 5:16pm
Thanks John, i might try get in touch with you.

As for Waveslave's questions, well i quiet enjoy the concept of land boarding (dirt boarding) with a kite, because it's so easy, convenient and cheap, and you can get quiet a bit of a thrill from it. For example, in cold winter months, i don't need to spend 20 minutes blowing up the kite, getting into water gear etc etc, instead i'm set up in less than 5 minutes and cruising along. So i did get the "REAL" kite, and land/snow boarding the foil kites are a recomended option.

Secondly, this was my initial step towards ultimatelly getting into kite surfing as well. And as i said, i am planning to take some lessons too. But i want to have flexibility of being able to do something all year round. Especially on lighter winds, you can stil get decent speed on land. So it's all about variety for me really.

The 5 m foil kite i have is not a toy, as it can seriously injure any careless user. It has more power than a 5m C shaped water kite.

As for the bar, i obtained a bar made out of strong wood, and the hole is pretty small so that it doesn't weaken the bar. In any case it was just a quick thing so that i can get an idea of flying with control bar. I would also disagree that a bar is a bar, as i have read and seen various setups, types and costs of control bars. Also, as you said water kites are flawn differently to foil kites.


VIC, 203 posts
19 Dec 2006 5:48pm
I hear you totally Superlizard, I get on my board or get a quick kite at lunch with a foil. 5 mins and up and going - 20 seconds and it is stuffed back into the car and off we go all red faced and sweaty back to work[}:)]
A 5m foil is about the same as a 10m - 12m inflatable for power.

I was building broomstick bars for prototypes until I got the bar length and pulley system worked out for the FTR kites. I've still got several stubby broom handles with holes in them I could have given you. I was also using Aluminium/steel broom sticks as well but they don't cut it for the 5m.They did fit very nicely with the bar ends though

I had a heap of bars manufactured but most of them are gone now for use in the school. I might be able to rustle something up for you though.

I've also got some external depower clips so you don't need to drill the hole in the bar.

Cheers

John
superlizard
superlizard
VIC
702 posts
VIC, 702 posts
19 Dec 2006 5:58pm
Most prefessional advice i received so far. Thanks a lot. I already sent you an email directly, so hoprefully we can get in touch soon.

But that pooley mechanism sounds like what i was missing, beacuse distorting of the kite (given that back lines were same distance always) would have made it turn around uncontrollably all directions.
waveslave
waveslave
WA
4263 posts
WA, 4263 posts
19 Dec 2006 4:16pm
quote:
[i]Originally posted by superlizard

Basically I'm very keen on getting into kite surfing, and planning to start lessons later this summer.





I'm guessing you think you want to kitesurf but you're not too sure ?
Am I right ?
Is it you don't want to spend the cash on gear and then find out kitesurfing is not for you ?
Or maybe you don't know what to buy in the first place ?
That's fairly common.
It's a confusing affair when you don't know anything.

So, you take the toy kite approach and dick around on a public beach with a dirt-surfer.
Or is it in the park ?
Wherever ?

But it's not in the water, that's my point.
And kitesurfing is a watersport.
What you need are real kites and boards that are designed for water.
What you need is commitment as well.

And commitment you can buy......
by purchasing paid lessons.
After which you will feel totally compelled to further pursue kiting....
Because you've just spent a heap of cash on kitesurfing but have nothing material to show for it.
You're at the crossroads.

But you'll have more kite-savvy than before,
and from that, there's no turning back.
Good luck.
superlizard
superlizard
VIC
702 posts
VIC, 702 posts
19 Dec 2006 6:41pm
No, i'm 100% sure i want to kite surf, so it's just a question of when and the budget availability. So you don't need to convince me to get a lesson, as i've been through this stage a while ago.

I have read heaps about it, and don't want to start off by buying cheap and unsafe second hand gear either. And i don't want to risk my safety with a cheap-arse equipment. That's why in the mid time i decided to get into landboarding first which is simpler and more affordable. Plus you can do it anywhere and any time.

In terms of knowing what to get, i am doing my homework, and will consult professionals, and trainers after i get some lessons. So i don't see that as an issue.

It appears to me that you are a tad annoyed that i'm doing kite-landboarding. It's simply a different game, but this forum is closest to it that i could find, and that's why i posted the question here. I understand commitments and other things associated with kite boarding, and i fully appreciate the sport. But i also enjoy kite-landboarding as it has it's advantages.

And i do take all necessary steps to ensure safety of others (including avoiding public beaches etc).

Cheers

tobes
tobes
NSW
1000 posts
NSW, 1000 posts
19 Dec 2006 6:47pm
Sounds like you've never flown a 5 metre "toy" kite waveslave.

I don't know why you think landkiting isn't a good first step to kiteboarding. I think what Superlizard has done is exactly what we should be encouraging, ie get a trainer foil, fly that to learn kite control, bigger foils quickly teach respect for the power of the wind. KiteATB requires pretty much the same skills as kitesurfing, but maybe bigger balls. Check this video- (14mb, but worth it to prove a point..
http://www.kitesurf.com.au/videos/03_kiteatb_sequence_512k.mov
waveslave
waveslave
WA
4263 posts
WA, 4263 posts
19 Dec 2006 5:09pm
quote:
[i]Originally posted by tobes

I don't know why you think landkiting isn't a good first step to kiteboarding.



If landboarding was such a great first step to learning kitesurfing...
Then all the gurus would initially teach kitesurfing with a toy kite and buggy in the park.
But strangely they don't.

The gurus teach kitesurfing in the water at the beach,
with a real kitesurfing kite and a real kiteboard.

Look,
I'm not a card-carrying advocate of paid lessons.
I'm more into the informal approach of mates mentoring mates.
The fun approach.
But that is not always possible.

But it's amazing how spending big money on paid lessons raises the conviction stakes.
Harden up superlizard,
Get some conviction.
VIC, 203 posts
20 Dec 2006 12:57am
Hey Slave

what about guys who don't swim or don't like the thought of being 5km out and having a long swim home or paranoid of Da .dum....Da.dum... and a shark fin up your coit. Getting wet isn't everybodies thing.

Maybe he's a snowboarder looking for a crossover that fits better.
Different strokes for different blokes. Take a look at the guys in the snow in Europe and you'll change your tune about the future of kiting necessarily being on the water. Those guys have got a whole new dimension added to their kiting ...height - 100's of metres of height in fact.

I personally like it both ways.... kiting that ison land and water.

Man if you saw our beach on a half decent day with 100+ kites and then take a look at the local boarding park with 4 or 5 guys you'd probably think twice too if you like your personal space!

Still we are mostly birds of a feather and go the Lizard man for having made a choice which is unconventional but in no way wrong.

You go fly a fixed bridle kite and see what it teaches you about timing your boosting. You can't just pull in th bar to pop as there is nothing to power up.. you also can't just let out the bar and take the power off either.
You need to learn to fly!!!!!!!!!!

Still I may be wrong and perhaps I had too many scotch's tonight
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