how is it that some major brands STILL cant make a good QR??? or even one that works for that matter!

not brand bashing here. I didn’t make the vid but I do think it shows how some brands need to lift their game and put safety and quality ahead of production costs and profit margins

ah yes the gr8 tree mystery is finally solved

Correct me if i'm wrong but wouldn't the pressure between the kite and rider be more relative to the weight of the rider. Isn't 200kgs a bit OTT

Wouldn't a 80kg rider would be getting dragged or airborn with 80 kgs or so of pressure from the kite.

So how the **** you could ever get that much pressure without wedging yourself behind a rock and doing kiteloops is beyond me. If you need to release by the time theres 200kgs of pressure your probably already dead.

If your kite can only lift the 80kg weight of the rider how do you boost???? Where do you think that power comes from??
I can lift an 80kg person on my shoulders but there is no way I could throw them 30 feet in the air for 10 seconds
For your kite to move your body weight of 80kg even 1 cm it must be pulling minimum 80.01 kg or more.
How does your kite pick you up and throw you around like a rag doll without generating way more than 80kg of pull??
How do people snap lines mid air?? If your kite can only pull 80kg??
Why are most lines rated for 150kg -250 kg??
Psylor I think your kite might have more power than you think! I think most people don’t realize how much power a kite can generate.

I’m not saying 200kg comes up a lot but it DOES happen! And it would be nice to know that your safety system is going to work.
The vid shows it is easily possible to achieve this level of safety so you have to ask the question “why doesn’t every brand???”

PS I didn’t make the vid but I know the guys that did and it is on the level whether you want to admit it or not.

Benni don’t go getting all defensive here. That’s great that your QR works well for you when you are self landing but even in the most “overpowered self landing” situation you are not going to get that much power in the kite are you

I don't understand why there isn't a common standard for quick releases.
and using the car thing - like seatbelts.

Well Steve,

If you can take a video of yourself dangling in midair, and releasing yourself easily with one hand, then I'll buy whatever you're selling

Incidentally, I don't think that the bungee pressure has anything to do with it, as mine will release easily under light load (20 kg or so). The design of my release means that the higher the load, the higher the force needed to slide the collar away from the pin.

It's obvious number 3 is a cabrinah QR. If it was so hard to open, wouldn't there be people attatched to those kites in the trees?????????

Just tried the same test with a spare chicken loop I had lying around -- and this one took almost no force at all! I did it with one hand easily.

This one is the style that has a couple of rings, with a loop of rope and a pin that goes through the lot.

I found a picture of it online:



I'll be retrofitting it to my bar thisafternoon! Thanks again Damo, your post could possibly have saved my life.

The first chicken loop is a north iron heart three. I changed to the trust bar about 6 months ago as my other bar was falling apart. It uses a hinged pin to hold the chicken loop so the load won't make it harder to open if anything it makes it easier

poor relative said...

I don't understand why there isn't a common standard for quick releases.
and using the car thing - like seatbelts.

At these still early times in our sport I think it's good not to have a common standard chicken loop. With open slather you will find different developers heading in different directions and in the long term the end user gets a better design.

Damo said...

how is it that some major brands STILL cant make a good QR??? or even one that works for that matter!

The INDUSTRY doesn't really care. ^^^
After 10 years the INDUSTRY still can't make a fail-proof donkeydick. lol.
That's why I make my own chicken-ring and dick.
By the way, did they do a test on death-leash releases ?
The death-leash release is the second stage release you need to pull after the chicken-loop release.
So much to do, hey ?
But that death-leash release is a tricky one though.
You can't find it or reach it in the panic when you're getting death-dragged on your back along the bitumen carpark.

I think it time to stop protecting brands and look at the issue... Its obvious that the majority here are not educated in the area of engineering or you would not be making the assumptions/ statements that you are.

As a Mech Eng with a Masters in performance base solutions, I agree the test can be improved, but its a good case study and something that should be put into practice. How many kiting companies actually undertake such a test prior to releasing a new QR... To be honest, outside of the lab and bringing in the human factor, it could be the dif between life and death...

All brands should be tested and we should have an Aus Std...

My 2 cents...

The one on my 11m REV can be released by flicking your pinkie across it.

As I found out today...

BrisKites said...

poor relative said...

I don't understand why there isn't a common standard for quick releases.
and using the car thing - like seatbelts.

At these still early times in our sport I think it's good not to have a common standard chicken loop. With open slather you will find different developers heading in different directions and in the long term the end user gets a better design.

totaly agree, they need to compete to develop the best designs and safest. Otherwise the development would slow down.

Well testing to 400kg does seem a bit OTT, but if you are VERY fat, it still works.

Kitepower Australia said...

I can easily see that the Cabrinha quick release in the video is an older one and that the bungee in it has been replaced.
If the bungee has been replaced, then of course the release pressure could be higher, why did they use such an old release?

Neil Pryde have had the release tested to the french standard, they have international product liability insurance (unlike most brands). We use the releases frequently in our school and I use them personally to self land frequently too, they do not require 25kgs of force to release.

Looks like a bit of brand bashing to me.

PS, just grabbed a brand new quick release and loaded it with all the force I could apply, then had my diminutive partner pull the release, took well under 10kg to release, so I'm calling total BS on the test in the video. The release is not a stock standard release, its been modified by them or the owner.
Who are the people doing the test?
Are they involved with the industry in any way? (all the boards in the background are North, so they look like a North dealer???)

I'm going to take a video of us testing the cabrinha release and post it asap.

The French standard is that under a 200kg load, the release should operate with no more than 10kg force, so if it has passed that, something doesn't tie up.

http://www.kiteattitude.com/us/kite_attitude_bar_questions_answers.htm

I have Cabrinha and Nobile kites. The Cabrinha release has always been easy to operate, but I haven't had anywhere near 200kg load on it.
The chickenloop and release on the video look like they are from years ago. Maybe the way they are pulling it is twisting the QR so that it bites onto the powerline sheath?