The lifting 4 times more weight 4 times more distance doesn't work with scissors in any configuration that has been shown. Ant showed us with his work that stabilization of the jacks are important by layering. Scissor lifts do give good lift and stabilization but require a strong motor to run the lift.james.lindgard wrote:@All,
With scissors, if one set is on each side of the weight like A and B, then it will be stable just like with a scissor lift. The amount of force needed to lift it would probably mostly depend on how fast it lifts. Bessler did say 4 times the weight and 4 times as high if I remember correctly. Scissors are about the only thing that would allow for that.
One reason why is leverage. If 1 n-m of force is used, 1 kg @ 1 meter, then if a 4 kg weight is lifted 50 cm's, then the weighted lever would only need to drop 12.5 cm's. Leveraging allows for this because scissors amplify one movement many times.
In something that is easier to work with, having the same weight as what is on a lever being lifted 4 times as high is 4 times the work. And while one person has claimed that this has been tested, I'm not so sure about that.
I'm not sure amplify would be your best choice of words. For each section of the scissor jack (to make it simple all the same size for each section) requires a multiple of the weight being lifted to the base weight section at the bottom to lift with plus you need to add the weight of the jacks themselves, then extra weight above that will finally be able to lift the weight on the end up. Real life test are better than math equations alone in this game.
Pointing out the toy page is good for I am sure there are some who may have not noticed that before
Here is a post of Stewart's from 2005 and then click on it to go to the string (Apologia Poetica) that is very interesting to read. The question to what you have brought up is being looked at.
http://www.besslerwheel.com/forum/downl ... er=user_id