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Author Topic: rokkaku  (Read 745 times)
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rob103
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« on: December 26, 2013, 06:22 AM »

can someone splain to me the difference between a rok with the horizontal spars, and a rok with diagonal spars?
thanks
Bill
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tcope
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« Reply #1 on: December 26, 2013, 05:21 PM »

You mean besides the obvious difference? I'd say that is the only difference... as it's the only difference.

I'm not sure what you are looking for.
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Todd Copeland
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rob103
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« Reply #2 on: December 26, 2013, 06:47 PM »

I was more asking if the flight characteristics were different, it seems to me that a rok with the spars crossing the spine diagonally would flex completely differently (more) at the bottom.  would this configuration allow it to "adjust" to higher or gusty winds  still a 4 pt bridle or a 3 point? is there a good enough reason performance wise to add the extra weight (4 spars instead of 3)
thanks
Bill
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SparkieRob
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« Reply #3 on: December 27, 2013, 04:59 AM »

I've never heard of a Rok with diagonal spas before. Do you mean a Hex kite? A Rok is an extended hexagon so I'm guessing it could still work.

Are the bow adjusters across each horizontal points?

A Rok still only has 3 spas, one vertical and 2 horizontal. And if they were crossing over in the middle there would still be only 3 spas. If anything there would more weight/flex in the diagonal spas as they would be longer.

I think bridling would be interesting as a Rok pulls on the upper and lower horizontal spas whereas the sail would take a fair amount of the loading with crossed spas.

A Hex kite uses a 3 point bridle.
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thief
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« Reply #4 on: December 27, 2013, 06:35 AM »

There has been a redesign of the standard Rokaku by a few guys in Europe.....yes, instead of a I frame configuration there is a X for the spreaders...this also has a 3 leg bridle....
I know that Christian Baden Powell is involved in this...



wander around here: http://levitor-kites.blogspot.de/2012/09/rokkaku-applique-workshop-march-2013.html
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rob103
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« Reply #5 on: December 27, 2013, 06:51 AM »

Upon doing some further googling! This beautiful kite by Christian Baden Powell seems to be the only example I can find.


fascinating time lapse of it's making:https://www.youtube.com/watch?v=jpm0Ol3VNNI
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rob103
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« Reply #6 on: December 27, 2013, 06:56 AM »

Ahhh I can see the bridle a bit better on the tribal dragon rok. Also one of Christian Baden Powell's
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SparkieRob
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« Reply #7 on: December 28, 2013, 03:09 AM »

Wow! Very nice looking Roks. Would they potentially take higher winds as they are bridled mostly top half?
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rob103
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« Reply #8 on: December 28, 2013, 06:19 AM »

I'm getting ready to start a rok build to try out my applique skills or lack thereof. I am going to ask Christian Baden Powell to explain the framing and bridling. Anybody know if he's a member here?
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thief
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« Reply #9 on: December 28, 2013, 10:39 AM »

Christian is not.... There is a Facebook group dedicated to this style of rok...it has the files that Christian provides about his kite: https://www.facebook.com/groups/564655963564549/
« Last Edit: December 28, 2013, 12:27 PM by thief » Logged

Kites kayaks & corgis again!!!
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