[12 piece bucket]

A nice summary - the endless belt and where the belt points (aiming point), the size of the pully too, are the key variables IMO.

To Lagster's question I'll add - where are the two 'centers' of the pullys? How does that relate to your center of balance? Does that change if you change where the belt points? (aiming point)

The changes to 2-K are an interesting way to shift the original perspectives on the left shoulder center IMO.

I posted this in an earlier thread and it may have more relevance here. . . .

http://theserver.theschool.columbia....s_pulleys.html

Check this out for more on Pulley stuff.

5. Decreasing Pulley Speed

Main Idea: If you use a small pulley wheel to drive a large pulley wheel, the large one will turn slower.

Additional Information: With this model, we have a pulley with a small driver wheel and a large follower wheel. It's really hard to make a wheel like the big one turn - it would take a lot of force. But with a smaller wheel, we can use a process called gearing down to help. Gearing down decreases speed but increases force. Since it's easy to turn a small wheel at a fast speed, we use it to move the large one. A small driver wheel makes a large follower wheel turn more slowly. Since this is a pulley model, both wheels turn in the same direction.

8. Gearing Up

Main Idea: If you use a large gear to drive a small gear, the small one will turn faster.

Additional Information: Here we see a large driver gear and a small follower. We can move the small gear pretty fast on our own, but we can use a process called gearing up to move it even faster. Gearing up increases speed, but decreases force. A good example of a gearing-up system in real life is a 10-speed bike - when you shift into 10th gear, you turn a large gear with the pedals, which drives a small gear attached to the rear wheel. For this model, one turn of the 24-tooth driver produce three turns of the 8-tooth follower. This ratio of 1:3 is called the gearing up ratio

10. Increasing Pulley Speed

Main Idea: If you use a large pulley wheel to drive a small pulley wheel, the small one will turn faster.

Additional Information: In this pulley model we have a large driver wheel and a small follower. We can move the small wheel pretty fast on our own, but these pulleys use a process called gearing up to move it even faster. Gearing up increases speed, but decreases force. A large driver wheel makes a small follower wheel turn faster. However, unlike gears, in this pulley model both wheels turn in the same direction.

This was built with Lego's. I reckon you could raid junior's box and build you some different pulleys to see what happens. Also . . . if the belt is crossed up. The wheels move in opposite directions.