Author Topic: Balance of Handsticks  (Read 2250 times)

Chiok

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Balance of Handsticks
« on: April 02, 2007, 08:43:01 PM »
I was wondering, as a wide range of diaboloing enthusiasts and professionals, I thought I'd get a census if possible.

After making a few of my own handstick designs, there have been good and bad aspects of each.  The most important point I'm concerned about however is where the balance point of a handstick should be.  A lightweight stick is all well and good as is a heavy stick but where the centre of gravity lies is also important as it determines the "swinging" characteristics of the stick especially during stick releases and other such moves.

Some say CoG near the handle end is good as it gives more swing, some say near the tip for better accuracy, and some say in the middle for all-round goodness.  From all your various stick experiences, where is the CoG on your sticks and where would you like it to be for what reason?  I'm just finding my new sticks to be a bit on the feeble side when it comes to mini-genocides...

Thank you people,
Chiok
www.gravityvomit.co.uk - Gravity pulls down, we throw up.
University of Bath Juggling and Circus Skills

nev

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Re: Balance of Handsticks
« Reply #1 on: April 03, 2007, 10:33:42 AM »
Personally I'd say about 3/5ths of the weight at the handle end seems optimal.  Too much weight on the tip end makes stick release stuff harder as the handle tends to flick around too quickly once it passes the tips momentum.

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              ↑      
             CoG

Ps - anyone know a source for carbon fibre tube as I've had a few breakages from stress at the tip end (the kite stuff I've been using is a tad too thin on the wall)
www.Diabolomoves.co.uk/diabolos/ - shop for Sundia diabolos, Handsticks & String

Chiok

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Re: Balance of Handsticks
« Reply #2 on: April 03, 2007, 11:58:39 AM »
Loving the diagram.  That's an interesting result of 3/5ths, quite precise (not quite two thirds, more than a half).  I've found having too much weight at the handle end causes the opposite effect (unsurprisingly) with the stick being difficult to swing around.

As for carbon fibre tube, the only other use of tubes that I know of is in archery arrows as it's more and more popular over the specialist wood and aluminium varieties.  If there's an archery range nearby, maybe you can blag some arrows that have been telescoped (that famous Robin Hood shot) or some that are just a bit useless and perhaps scavenge some from there.  Or buy them direct from a supplier if you can find out what you needs are.  If you're fortunate and they have the right weight requirements, you can get thin aluminium shafts layered in carbon fibre for super strong and light sticks.

Chiok
www.gravityvomit.co.uk - Gravity pulls down, we throw up.
University of Bath Juggling and Circus Skills

-Leo-

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Re: Balance of Handsticks
« Reply #3 on: April 03, 2007, 12:22:30 PM »
Yeah I'd say somewhere in the region of Nev's suggestion, maybe pushing it out to 2/3's of the weight. I think that this will give the stick a nice swing while maintaining the 'accuracy' Chiok spoke of.

-Leo
Behind your back is your front.

JC

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Re: Balance of Handsticks
« Reply #4 on: April 18, 2007, 07:33:20 PM »
If I take my 350mm Henrys Carbon Sticks, I see that the Center of Gravity is in the place
you could find in Nev´s diagramm.

On the other side think about the infinite suicide, the center of gravity is the axle of the diabolo.
The string and the hand stick is in line and always tangential to the axle.
So I think the momentum is this

Momentum [Nm] = m [mass in kg] x v²[speed in (m/s)²] / radius [in m]

If the weight of the stick = 0g (no stick ;)) you have no momentum.
So I think most depends on the weight of the stick, speed and radius are flexible.
www.diabolonet.de - email to: diabolo-kits@web.de
MONOBOLOS, Henrys Circus, Vision and MB Finesse with round shaped axles

 

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