from São Paulo to Michigan

[murilo]

This is a very fast report!
As some will remember, I'm building a model using that same chain I got at years ago.

From march, this is the first time I return to tell some stuff about.
In other thread, I got a discussion with JimMich, where he said that the under wheel in my draws was not ok, and the lighter side should block to the heavier, since momentums was not favorable. He said this as a point to invalidate to ALL conception. Jim has a very sharp and fast trigger!

My arguments was that the trelisses should discharge - or conduce -the reverse resistance to inside, or in touch to the periphery of the wheel, thanks to complex triangles compositions.

My model is going great:
- the transparent acrylic blade columns work very fine, and chain may move freely up and/or down, as one wish.

- the whole iron skeleton is fine, equilibrated and strong enough.

- first of all I concentred efforts to the ''U'' partial mounting, since it's very basic to the avalanchedrive concepts.

- my draw and constrution of that wheel was just terrible and very badly done. The track between wheel and chain failled many times and I almost got some violents ''avalanche-pinchs''. The danger is allways there... gravity acts, as you know, very fast.

- then, I started to work with device, at first, in horizontal position, much safer than vertical. The track - wheel-chain - kept real bad and I simulated the tracking by others means, holding the chain in 5 vertices to the wheel and hooks.

- the wheel has 250mm diameter and the chain 120mm width, and we got: 15kg at radius 125mm, against 7,5kg at radius 245mm, and all stuff bracked. The lighter hold to heavier, as said our wise Jim.

- wise Jim couldn't say why it wouldn't work in that play of forces and I got it now: the natural behavior of gravity follows to *the easier way*, that are those external arms, or locks. Very simple!

- BUT, nothing will replace to the pleasure I have in ''talk'' and ''listen'' to my model! Nothing! What did I wonn, for the while?

= the blocked ''U'' set shows easily that the reversion concept is great and, even blocked, that ''U'' acts as a free bascule. With my hands I can make it move up and down, as wished. The two columns will follow to the movements, up and down... beatifull!

= this shows me that *when* I build a wheel with the radius with the double of chain's width, and bigger weight will be applied at a ''radius'' not exactly the half of the resistance weight moment, as present model, the result will be an evident surplus to heavier side.

= other profits came from this experience, and more than ever I know that my project will work well. Enough to start that bigger wheel.

= best of all, as a complete surprise, I got much more to think about. At contrary of my previous mind, I found to an *impossible* avalanchedrive second generation... :)))))) Not discribed at my patent require!
My brain keeps frying and burning, and my bag full...
Best regards!
M. SP aug/25th - I hope and will thank if you'll have enough patience to reach at my painfull english -

[jim_mich]

Murilo,
One thing is very true... your English is painful! I understand maybe 80 percent.

this shows me that *when* I build a wheel with the radius with the double of chain's width, and bigger weight will be applied at a ''radius'' not exactly the half of the resistance weight moment, as present model, the result will be an evident surplus to heavier side.

No! Different weights and different dimensions will not make it work!

I found to an *impossible* avalanchedrive second generation... :))))))

Good Luck.

[murilo]

Jim... ''maybe 80 percent'' is quite a progress!
Suposing I have had a first grade mechanic tecnician near me, distroying to all ideas I could have, my live should be really poor.
The experience one can get - with the personal right for to be wrong - dealing to a real device is priceless.
I'm outlaw and happy!
Thanks for the wishes.
regs. M.