double pendulum lever

[mr_bojangles]

yes, apolgies, i forgot to throw that key in there

the last drawing i  posted is to scale for a pendulum with a height twice that of the lever it rests upon

the idea is to lock the counterweight in place and keep them there while the lever torques

then pendulums can be released and whatever energy is gotten out is put back into the pendulum

the SI unit for torque is the Nm, which is why i chose to do my calculations in this fashion

in a couple posts earlier i used feet and pounds



picture how much energy it takes to get the pendulums back to equilibrium

now instead of picturing two, picture one with twice the weight

we must now move it 10* to get it back to starting position


since we already know how long the pendulum is, we know how much torque it produces

more to come later, P-motion, just try plugging in your own numbers for your own calculations, mine arent really textbook calculations

i would recommend starting with the first drawing ratio

make the lever 4, make the height of the pendulum 4, and just use "x" for the weight

it shouldn't look like anything special until you remember you have the option to utilize a gear system to gain greater distance with the same force (respectfully)

[mr_bojangles]

i find it odd with the simplicity of my idea that no one really has an opinion on it their willing to share, comments as to why people think it won't work are the most helpful, unless it is a way to make it more efficient, being best case scenario

all well, il keep this in the back of my mind for a while, less someone has anything else they would like to add

[overtaker]

Get well soon Jim!

[mr_bojangles]

@Jim

i like the way you think, thats a clever observation


my goal for this is to extract energy from the lever

essentially, unbalance the lever using the weight of the pendulums, and instead of using direct force to manipulate the mass of the counterweights to induce an unbalance effect on the lever, use the already shifting position of the pendulums counterweights


if instead of a string we use a rod, it gives us the flexibility to stop and lock the pendulum at any position we want,

so first we lock the lever, let the pendulums swing into position on the other side of the axle, and then lock the pendulums, allowing a force to act upon the lever,

and possibly if timed correctly, we could use the torque of the lever to act upon the pendulums at the bottom of their swing to continue the process


do you think this is possible? so far i know i can make a system that produces a torque on the lever with a force equivalent to the weight of both counterweights to reset itself, however with friction this means it would not run itself, due to the delicacy of this process

ive got another way of doing this without pendulums, but i wanna run through some numbers first, if they come out to be what i think i might PM to get a second opinion before posting anything major


until next time....

[grayone]

mr_bojangles

My Step Dad gave me permission to show you his triple pendulum to be food for thought. The center lifts and drops to try to help accelerate the pendulum but this did not happen as planned. But if it helps open some new thoughts in peoples minds. He said go ahead and show it.

Michael

OH yes, Copy wright 2010, The shifting pendulum set, by Alan Bauldree