Gravity Motor Patent 7/10/08

[mondrasek]

Hey mondrasek

Close. The idea is to have the magnet arrive at the switch well before 6am.

This puts the mean centre of the magnet orientation above the axel, theoretically causing gravity to attempt to correct it.

It should also reduce the amount of negative torque as the weight shift of the magnet across the horizontal is moving left to right, the same direction the bottom half of the wheel is moving (in a clockwise spinning wheel).

It should work, in theory, but we've seen what happens to a lot of theories over time, so take it with a grain of salt for now. But I definitely see the advantage in such a setup.

shakman

EDIT: Ooops, messed up the underline 

Either I am not quite following still or I think you are mistaken.  The maximum torque due to gravity and the imbalance will be provided when the Center of Gravity of the wheel is directly to the right of the axel when spinning clockwise.  In your cD representation this is the case.  In order to move the CoG above the axel as you suggest you need to rotate the cD imbalance counterclockwise some.  This in turn moves some of the heavy side "D" to the wrong side of the axel.  Same with the light side "c".  So the light side gets a bit heavier and the heavy side gets a bit lighter.  This gives less imbalance and less torque due to gravity.

Am I stil misunderstanding?

Clanzer,

Welcome home and thanks for the links to your Halbach Array videos.  I'm sure Dudeman will be amazed and call me once he sees them.  And it looks like I'll have to learn about the tri-force gates.  That's a new one for me.

[xee]

@Clanzer
I would think that you would want to make the magnets as long as possible in order to generate the largest possible change In center of gravity for the wheel. Your magnets look pretty short.

[shakman]

Either I am not quite following still or I think you are mistaken.  The maximum torque due to gravity and the imbalance will be provided when the Center of Gravity of the wheel is directly to the right of the axel when spinning clockwise.  In your cD representation this is the case.  In order to move the CoG above the axel as you suggest you need to rotate the cD imbalance counterclockwise some.  This in turn moves some of the heavy side "D" to the wrong side of the axel.  Same with the light side "c".  So the light side gets a bit heavier and the heavy side gets a bit lighter.  This gives less imbalance and less torque due to gravity.

Am I stil misunderstnading?

Clanzer,

Welcome home and thanks for the links to your Halbach Array videos.  I'm sure Dudeman will be amazed and call me once he sees them.  And it looks like I'll have to learn about the tri-force gates.  That's a new one for me.

The idea is to have magnets (weights) towards the inside of the wheel all the way around the wheel except for a section from 12-12.30 and 4-5. This means the greatest amount of weight is on the upper part of the falling side of the wheel.

A simple experiment you can set up to see my logic for having the majority of the weight at the upper falling side of the wheel:

Connect a weight to a point at the rim of a wheel. Turn the wheel at random then hold it still and let it go. Repeat this experiment several times. Putting the weight at the upper right quadrant of the wheel should produce the best results (EDIT: for clockwise momentum). The idea is to emulate this effect with the weights in the arms.

The biggest problem with the current design is that the weights at the bottom of the wheel will move further out than those at the top, putting the CoG below the axel. Gravity will win.

My idea is just a theory as I said, but one definitely worth exploring IMO.

Regards,

shakman

EDIT: Clarified a few things and fixed some typo's. Mutli-tasking here at work - the brain went off on a few tangents.

[CLaNZeR]

@Clanzer
I would think that you would want to make the magnets as long as possible in order to generate the largest possible change In center of gravity for the wheel. Your magnets look pretty short.

Hi Xee

They are 1.5 " long and as the video shows, fires a fair distance. If anything I fear they will travel too far LOL
These are strong magnets and weigh 80 g a piece and can easly take a chunk of skin out with one false move hehe

I am going to setup a tube tommorow on a wheel and find the best travel length that suits there weight and the speed that I estimate the wheel will run at.

Love TK's video with the wire and have a few other ideas I want to try along the same line. If it does not work out too well I will go down the latch route.
As TK said it is making sure the Rotor magnets do not make full contact with the wire, or else you will not get enough force to launch them again.

As usual only experiementing will show.

Cheers

Sean.

[CLaNZeR]

Wow just had a nice result.

Neighbour knocked on the door and parcels had been delivered to them

Now got my bits ready for the weekend.



Gonna replace the metal screws in the pipe clips for plastic ones BTW.

Building big wheels seems to be more fun, must admit, Less CNC'ing as only need to mill out the end caps  !!

Cheers

Sean.