how much force is involved in kiting?

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how much force is involved in kiting?

Postby behindThePeak » Mon May 06, 2013 8:50 am

awesome day yesterday. my hamstrings are wasted; which got me thinking: has anyone done the math on how much force is involved in kiting? riding over-powered feels a lot like pulling a heavy deadlift and i'm wondering what the equivalent amount of weight would be.

something like: kiting at X mph windspeed with a Y m2 kite = lifting Z pounds.

i suck at math; but i know we have some engineers on this forum. who has a formula for this?
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Re: how much force is involved in kiting?

Postby CdoG » Mon May 06, 2013 10:24 am

Were you riding a surfboard?
I blew out my hamstring real good last year just riding hard on my surfboard
Not that over powerd juat slashing around
last week I tweeked it again on the surfboard
I was very lit up on my 9m a couple weeks ago and blown off the water on my twin tip
And my hamsteing was just fine
so you might want to look into force of different boards?
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Re: how much force is involved in kiting?

Postby buckidge » Mon May 06, 2013 1:14 pm

someone should invent a force platform (http://en.wikipedia.org/wiki/Force_platform) that's waterproof, battery powered, and fits on the deck of a kiteboard.
"A ship is safe in harbor, but that's not what ships are built for"
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Re: how much force is involved in kiting?

Postby jrg » Mon May 06, 2013 1:31 pm

buckidge wrote:someone should invent a force platform (http://en.wikipedia.org/wiki/Force_platform) that's waterproof, battery powered, and fits on the deck of a kiteboard.

Might be easier to put a force gauge on the lines.

This my guess for a 12m kite in 25mph wind seeing 50 mph apparent wind (wind + some % of kiter speed + some % of kite speed right before liftoff for a jump - I suspect this is high)

Assumptions:
12 m2 kite
50 mph kite speed (25 mph wind + kite motion)
1.2 lift coef (high)

Lift - 1/2*air density*velocity*velocity*area*lift_coef = ~1000 lbf
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Re: how much force is involved in kiting?

Postby Loscocco » Mon May 06, 2013 7:58 pm

you guys are doing too much thinking and not enough kiting
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Re: how much force is involved in kiting?

Postby le noun » Mon May 06, 2013 10:04 pm

Loscocco wrote:you guys are doing too much thinking and not enough kiting

+1
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Re: how much force is involved in kiting?

Postby OliverG » Mon May 06, 2013 10:15 pm

Use the force...

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Re: how much force is involved in kiting?

Postby MehYam » Tue May 07, 2013 2:17 pm

Calculating force from your couch:

1) watch vid of someone boosting
2) dead reckon the mid-jump velocity
3) calculate acceleration a = dv/dt
4) dead reckon the weight, plug it all into F=ma

Special thanks to my high school physics teacher
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Re: how much force is involved in kiting?

Postby zgur » Tue May 07, 2013 4:18 pm

Cdog - it may be time for you to do a little Yoga to get those hammies more flexible....

aging is so awesome - your muscles get more limber/stronger....recovery periods shorter....o2 processing capability goes up....

But you do appreciate things more.

Get sum, Z
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Re: how much force is involved in kiting?

Postby CdoG » Tue May 07, 2013 8:26 pm

Yup your right Z


And I do remember you doing yoga before during and after kiting sessions
Years ago
Do you still do that?
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