Gravity Wheel

[Calloway]

Georg Kunstler,


<when, I say when it will turn with higher rounds per Minute, then the pendulums will describe a circle path, then they will not push the sliders anymore.>



Not true Georg, The pendulums swing to the inside on the left side in cw rotation. The pendulums on the right side swing out and away from the wheel. ccw the opposite happens. Pendulums swing in on the right side and out on the left side. This makes the wheel bidirectional. Look at this way. Cw on the left side the pendulums are pulled by the wheel which brings them in. The right side centrifugal force is moving the pendulums out and away from the wheel. You have to actually see this on a wheel wih pendulums attached. Cheers

[dradford]

Georg Kunstler, when aCalloway wrote that he pushed one of the sliders, this was when he was experimenting with the weights to see where the unbalancing needed to happen, he doesn't need to push the weights every time he wants to start the wheel!

[Georg Künstler]

Hi Calloway,
oh, i see it now, you are right. the pendulum is travelling to the Center, when you have a low Speed. So it is not swinging, but driving.

So the pendulum is hanging strait down and with the Rotation of the Wheel it is pushing the slider.
The resistance to stopp the pendulum is driving the slider.

Still a feedback Loop. A Driver drives the Driver function.
Pulsating function. The correct timing is required.
Difficult to handle but feasible.

Very good, worth to invest more time in this construction.

You have found the way, the rest is Engineering work.

[dradford]

Calloway, do all the pendulums hang at the same angle, all the way round the wheel? I can easily adjust the animation to show that - in fact, it was much more difficult trying to manually adjust each pendulum to a different angle on each frame.
I can't find a single example of a pendulum hanging from a wheel on the internet anywhere, not a simulation, a diagram, or a video - it's as if nobody in the world has ever tried it before!

[Georg Künstler]

Hi dradford,

I tried it. have a look to

https://www.youtube.com/watch?v=0pu3ln7pKKk

The pendulums are always straight down during the turn, if you turn it slowly.

[dradford]

Hi Georg, I think you would get a much more realistic result if you used string and weights on the end, not ratchets. I wouldn't describe those as pendulums, so your results aren't going to be what real pendulums do.

Plus those ratchets are too long for the diameter of the board they are mounted to, to be anything like Calloway's design, and there is no video of the board turning, is there? Just get some bits of string and some small weights, and put those on the board and spin it, then we can see what the pendulum does. Or maybe Calloway will put up a video soon.

[Georg Künstler]

Hi dradford,

the function which Calloway is using is not the pendulum function.

The pendulums are there as a Driver, to push the slider sidewards.

What I showed that the pendulums in my case the ratches are hanging straith down during a turn. I know that my pendulums as you say will only turn in one direction, but I can make you also a Picture and a Video of a 8 pendulum weights construction.

I will See what I can grab from the barn in the evening, I know there is a construction what fullfills your Need. Then you have your better example.

[agor95]

I have update the Calloway sim to v0.4

Also placed a double pendulum on the helper site.

https://steampunks.ddns.net

I had to clear my cache history to get the new version of the page.

Hopefully you will not need to do that.

I will try to get the pendulums in the Calloway to use the double pendulum behavior.

Also get the reload working.

[Georg Künstler]

hi Agor95,
I have watched your animation.
Great work.
As I understand the construction the down hanging sticks should shift the sliders sidewards.
The sliders are, so to say in the way of the hanging sticks.

The sticks have their travel speed, sidewards, and contact the sliders and shift them. if we have a pendulum weight, then the weight is lifted against gravity, and that only because we delay the normal travelling Speed.
Now gravity's Task is it to bring it back to the original Position.

[Calloway]

Guys, When the wheel is at rest all pendulums hang straight down. When the wheel begins to turn cw the pendulum weights attached by a cord to the outer diameter of the wheel lag behind on the left side and swing inwards while turning. On the right side centrifugal force pushes them out. The pendulums are not really "swinging ". They "swing" with the wheel inwards on the left side and swing out on the right side. There are 2 different actions taking place to the attached pendulums as the wheel turns. This is where momentum is added to the pendulum weights as the wheel turns. This added momentum is what allows them to easily push the slider pairs. It's like swinging a weight tied to a string over your head with your hand. How David slew Goliath. Centrifugal force adds to the weight of the pendulum weight. (if that makes sense). Cheers

dradford, Yes, the angles are all the same on the pendulums cords as they swing.

[agor95]

Thanks you for letting me know you can see the demo.

The Calloway demo is at version 0.4; so in the process of construction [draft].

It is all in a neutral state and with no pendulum interaction with the sliders.

This allows me to add behaviour like the pendulums moving and affecting torque of the disc.

That is when we have to set the 'Moment of Inertia' of the disc and pendulums.

Also the center of mass of the pendulum etc.

You will see on the site a Double Pendulum.
That is guiding me to put the math's into the Calloway Demo.

note. All masses are in green and fixing points in yellow.

P.S. Can anyone remember this pendulum behaviour being posted on the forum before Calloway. If not then Calloway get the credit for the effect. It almost looks like a 'ponderance' of the swinging pendulum.

[Calloway]

Agor95, I can't see anything when I click on the link at steampunks. It brings me back here to the group page. Something I'm doing wrong? Cheers

[agor95]

First rule of 'Information Technology" IT - It is not your fault it's the computers.

https://steampunks.ddns.net

Never had that problem before - can you click on the https above?

Note: The Steampunk on the last post is a Screenshot image.

P.S. if you click on agor95 on the left of my post. you will see my profile and there you will see the link to the above web site.

Cheers

[Calloway]

Agor95, Got it! My bad. I just didn't know.. Looking good. Thanks

[Georg Künstler]

Hi dradford,
as promised the pendulums on a disk, one weight is being lost during the years.

But still you see the movement of the Pendulums.
https://www.youtube.com/watch?v=lkxuRXeoK-g