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Old 12-31-2010, 12:31 PM   #28
Erick Mead
 
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Dojo: Big Green Drum (W. Florida Aikikai)
Location: West Florida
Join Date: Jun 2005
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Re: Direction of Groundpath

Quote:
Mike Sigman wrote: View Post
If that's true, we should be able to discuss what it is that is spiralling. It can't be intent; that's pretty easy to establish. So what is it that is spiralling? Spiralling from where? All at the same time? Sounds like some sort of mixed up idea of directional-jin/kokyu, but somehow something else is being substituted for the intent-driven jin/kokyu. So what would that be? That would be my original question.... "how does it work?". I.e., WHAT is spiralling?

If it's a true perspective it can be explained physically.

M.
... More things, Horatio. ... What it is, is spiralling in 90 deg. offset opposing spirals -- torsional shear stress, a potential which when released creates an unlevered action that the mind learns to lead and then to drive -- like surfing.

This:

Old version of Yin-Yang symbol:


-- is just the plan (top-down) view of the spiral stress depicted this:
http://www.aikiweb.com/forums/attach...9&d=1215185239

All shears cause rotation or rotational stress -- torsion. Shear stress in torsion in a cylinder (like the torso or limbs) is composed of a simultaneous compression spiral at right angles to a equal magnitude tension spiral -- and the stresses are maximal at the surface and diminishes to zero at the center -- which is what the old version of the diagram shows.

Cordially,

Erick Mead
一隻狗可久里馬房但他也不是馬的.
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