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Author Topic: World lightest fullsize kite - The Wraith  (Read 1708 times)
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ae
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« on: December 22, 2013, 01:44 PM »

From today's indoor meeting,
A short video of my Wraith, the world lightest full size kite in flight.

https://vimeo.com/82510838

Wingspan 102.4 inch
Weight 1.66846 ounces
« Last Edit: December 23, 2013, 12:17 AM by ae » Logged
adx1592
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« Reply #1 on: December 22, 2013, 02:36 PM »

Oh my god.  Tongue Smiley
More info on specs/where to buy one should they be forsale/what are they capable of?

This looks fantastic. Great!
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-Devin Cobleigh-Morrison
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« Reply #2 on: December 22, 2013, 04:09 PM »

 Smiley

...So Andre, you specialise in building the very fast and the very slow.


I can't help wondering, what would happen if Jon Trennepohl built an Ocius SUL with the sail made of whatever the white lightweight fabric is called (Cuben?).  - The kite would weigh 7x7 = ~50 grams from its Skyshark Zero frame alone, + the tail weight.  But there would still be a substantial weight saving (>~1oz) in sail material.  - One could have a kite with the frame strength and rigidity of Skyshark, the standoff depths for tricking, and an overall weight significantly below that of current stunt SULs.  As the remaining weight would be concentrated in the spars (i.e. much in the nose, tail and leading edges, for maintaining angular momentum), perhaps it would trick (almost?) as well as an Icarex fabric kite.

Devin,   Of course I was very impressed with your indoor flying of the Aura.  - So much so that for perhaps 15 minutes this morning I was thinking about giving in and buying an Aura SUL.   But on re-watching and repeat watching your and Joe's videos, it dawned on me just how much movement you were putting in, much more than my old legs would be happy to do nowadays, and how our Benson Inner Spaces were a nice half-way house to a more sedentary indoor flying style, and from its outdoor performance in dead calm air (haven't had the chance to fly it indoors), I suspect a well broken-in Ocius SUL is as well.  Once one gets used to the style, it seems that the Ocius SUL is as trick capable as a heavier kite, so perhaps one could loose some of the weight of the sail, and still be able to do all the tricks, perhaps even slower at times....     

Why not a Cuben version of an Aura SUL rather than an Ocius SUL? - it is that the Ocius SUL has a better sail area to weight ratio and so seems a better starting point.
« Last Edit: December 22, 2013, 04:39 PM by damp_weather » Logged
adx1592
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« Reply #3 on: December 22, 2013, 05:10 PM »

Damp_Weather,
Actually the aura is more suited to trick like a bigger kite, and is liter as is. The indoor Aura is 4oz on the nose, the SUL is 4.8 and the UL is 5.4 or somewhere around there. Because the Aura has been flatted out to fly indoors (if you can slow the video down, look at how far in the standoffs are) I think the combination of a flatter sail, lighter kite, etc would make the best option for the lighter material kite. The Aura is smaller then the Ocius, yes, and the Ocius has a bigger sail area. However it is smaller and lighter, but built and balanced in a way to trick faster and trick like a bigger kite, and take as much of a beating.

Another thing to take into account is the tricking and what goes into getting a kite out of a slack line maneuver, specifically pitch based ones. Because the kite is almost always going forward towards you all the time and theres no wind to blow it backwards to put tension on the lines (cascades, commetes, JL, anything with a rotational based throw, running to the kite to catch it, if the maneuver is executed above the pilot, etc). Theres lots of moving there, and also to get a kite to come out of a turtle in a rotation or 2 takes some movement too, especially if its locked on its back. Two different styles, apples and oranges. I figured there enough slow and floaty indoor kites out there and the one thing that the US is missing is an american made indoor trick kite (others include the W.S. Itrix, L'atellier Double Zero, and the LevelOne Amazing, but thats it. Nothing in the US really) so we figure we could fill that gap a bit as well. I would like to see what we can do to lighten it up more. We are thinking about cutting down on some material on the LEs and other things as well. Nothing will match up to an 8foot kite that's just over an ounce, however.  Cheesy (thats what I prefer honestly, as I usually will go to a PDSUL on 20foot lines).


----
    Andre, I would like to talk to you sometime about your design approach to indoor and light wind flying. That kite reminds me so much of the PDSUL it gets me excited, haha. I would love to try one of those out at some point, and keep one in my bag if you ever decide to produce them. This thing looks fantastic.
« Last Edit: December 22, 2013, 05:24 PM by adx1592 » Logged

-Devin Cobleigh-Morrison
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« Reply #4 on: December 22, 2013, 05:12 PM »

Very nice kite and flying.
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ae
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« Reply #5 on: December 23, 2013, 02:10 AM »

Another little video of it,
different pilot, different point of view
and sadly the camera seems to have a problem with focusing it at times...

https://vimeo.com/82540759
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damp_weather
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« Reply #6 on: December 23, 2013, 03:22 PM »

Devin,

Thanks for the explanation.  It is very helpful and almost all understandable.  You covered some points that I was thinking of asking about in the other threads - e.g. I didn't appreciate that "Aura Indoor" was different from the Aura SUL.

Quote
and trick like a bigger kite
...That's the bit I don't understand.  (For example, is it referring to the tow points being far apart so that the pulls are same as for a bigger kite with the tow points relatively closer together?)
Perhaps something for the other Aura threads, to avoid diverting from Andre's Wraith.  Sorry Andre.
« Last Edit: December 23, 2013, 03:27 PM by damp_weather » Logged
Krijn
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« Reply #7 on: December 24, 2013, 01:14 AM »

... and the one thing that the US is missing is an american made indoor trick kite (others include the W.S. Itrix, L'atellier Double Zero, and the LevelOne Amazing, but thats it. Nothing in the US really...


hmm, I owned some indoorkites (the amazing is very nice), but the two left are from america!

a synchro and a reflection (see picture)





found some big sport halls nearby, i'll give them a call soon

Krijn
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Krijn
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« Reply #8 on: December 24, 2013, 01:15 AM »

the wraith looks very slow andre, cool!

but i assume it is too light for some tricks?
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ae
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« Reply #9 on: December 24, 2013, 03:13 AM »

Hi Krijn,

tricks are severely limited, because as you noticed the weight and then the frame fragility. You would most likely pull the frame apart in mid air if you pull to hard.

Tricks wasn't in the design book at all. Smiley
All it supposed to do was been able to fly, because a kite that can't fly is a sculpture, and to be lightest one.

Both goals i think where more then just meet.
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adx1592
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« Reply #10 on: December 24, 2013, 07:32 AM »

I owned 3 echos and a reflection and they're near impossible to get JL's and some pitch based stuff to look kind of close to decent. The Synchro I haven't flown, but I'd assume its a rotational based monster. Not sure about pitch, doesn't look like it based on the build but I could be wrong.

Andre, what kind of tricks have people pulled out of the kite? It seems like theres a few really, REALLY nice rotational based/floaty things it can do, maybe on longer lines or so. Looks like a pinwheel would be to die for. Whats your experience with anything like that?
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-Devin Cobleigh-Morrison
ae
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« Reply #11 on: December 24, 2013, 09:08 AM »

David,

Rotational tricks seem to work, if you can get the kite through the rotation and without snagging the lines. Helicoptor, very careful axel and such. But since i don't fly tricks, the kite isn't designed with tricks in mine at all Smiley

Got another video of it

https://vimeo.com/82593565
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John Welden
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« Reply #12 on: December 25, 2013, 12:02 PM »

Thats an amazing kite. Great job.

I'd love to see close up pictures so I can understand more about it.
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stapp59
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« Reply #13 on: December 25, 2013, 12:18 PM »

Nice kite!  Good to see folks still pushing the boundaries of design and construction.  Keep the info coming  Smiley
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Steve in Indiana
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ae
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« Reply #14 on: December 25, 2013, 12:50 PM »

Alright, since you asked, some details

Frame is custom made for me

that is one part of the leading edge,
The full tubes i got where 108cm long and about 5g each.
For the leading edges i cut the thick ends off and for the spreader the thin end.
total leading edge weight is 7.8g per side.

For the upper spreader i ferruled then bot of the thin ends i had together.


All ferrules where made from cut offs to save on weight



Standoffs are made from 1mm pultruded tubes.

Spreader/leading edge connectors are made from thin PTFE tubing


The sail is made from 11.4g/m2 cuben fiber and sewn together, because with a thin thread the seem is lighter then glued Smiley total weight for the sail is 12.6g.




And the final result


 
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