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### how much force is involved in kiting?

Posted: 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?

### Re: how much force is involved in kiting?

Posted: 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?

### Re: how much force is involved in kiting?

Posted: 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.

### Re: how much force is involved in kiting?

Posted: 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

### Re: how much force is involved in kiting?

Posted: Mon May 06, 2013 7:58 pm
you guys are doing too much thinking and not enough kiting

### Re: how much force is involved in kiting?

Posted: Mon May 06, 2013 10:04 pm
Loscocco wrote:you guys are doing too much thinking and not enough kiting

+1

### Re: how much force is involved in kiting?

Posted: Mon May 06, 2013 10:15 pm
Use the force...

### Re: how much force is involved in kiting?

Posted: Tue May 07, 2013 2:17 pm

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

### Re: how much force is involved in kiting?

Posted: 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

### Re: how much force is involved in kiting?

Posted: Tue May 07, 2013 8:26 pm