Energy from gravitation

[Gravitator]

Maybe this one is more realistic. The cable lengths are not exact as they should but I hope the idea can be still found.

[Marctwo]

Phase 4:  The 2 750's are only 1/2 purchase so will not be able to lift more than 750kg.

I do find multi-purchase systems very interesting but in the end they still balance out the same as single purchase... no matter how complicated you make it.

[TinselKoala]

By "purchase" Marctwo is referring to the moment arm. The pulleys act as simple levers. The torque available is the product of the horizontal distance from the weight to the fulcrum (axle) and the weight. For pulleys the arm is always the radius of the pulley. So the radius of your pulleys has to be taken into account. Say your inner wheel (pulley) is half the diameter of the outer pulley. Then the moment arm for weights suspended from it, is half that for weights hanging from the larger outer pulley.
The quantities that you should be working with are moments, not simple weights. Moment = weight x arm. Arm = radius, for pulleys.

[Marctwo]

Yes, cheers TinselKoala.

The 'purchase' I refered to is just the leverage ratio.

[Gravitator]

Thank you for your help.Learning by doing Now I have gone little future with this idea and so far it looks like it might work.
IF my assumptom is near the right. Can anyone tell me how much will the 40 kg weight move if 100 kg moves 1 cm?