Pulleys and Linear Travel Calculation

This link gives the basics of pulley operation.

Thanx JohnDG. I had seen that site B4. The mech. advantage of pulleys is always focused on forces, but is that also applicable to linear as well? In other words if you have a pulley system that provides a MA of 2 or 3, is the distance moved 2 or 3 times as well?

Cadguy

If it creates a MA of 2 or 3. The distance would be approx. 1/2 to 1/3 respectively

As phoenix911 indicated, the positional and mechanical advantages are inversely proportional.

The only place this is (obscurely) referred to in the post I gave was right at the end, where it says something like " ... since W = FD".

This means "Work done = Force x Distance moved".

You wish to move an object 24' with a ram that extends 10' 6" ... so object moves 2.3 times the stroke length?

Why use a pulley system and indeed can you?

Regards Woody

Yes Woody

Using a hyd cyl to winch a container on a truck. New venture but has been done many times by different means ... all with pulleys (sheaves).