Tony Smith wrote:

> I'm not sure how it would scale up (bigger load in your case).  As you
> know, double any variable and the amount of aggravation goes up
> four-fold.  

Oh, yes... :)

> You'd need to build a test rig.  At it's simplest, it's a motor with a
> (long) worm gear, some steel cable (even thin stuff can handle a few
> hundred kilos) and a pulley.  

I may just try this. This or a belt. (I'm a bit partial towards the belt.
Probably easier to avoid slipping.)

Gerhard

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