Georg's way to the one directional wheel

[Georg Künstler]

to buildt a one directional, slow moving wheel, we need to understand the rolling of an eccenterweigth. When a eccenterwieght is rolling along the surface it has always a different weight on the surface(ground). This force is variating. Jonathan and others on the board can pass the formular to the board.
I buildt some cheap examples of these roller. Have a look, and understand that force is variating on the ground by rolling.

Next step, when formula is available on the board.

the future has begun

Georg

[Gravmaster2000]

A continuous pendulum (in essence) , with no direction changes... I HAVE thought of putting something like this (or 2) in a wheel and timing the weight pulses to the wheels rotation, but there is more to it then that...right?
I DO agree that "shake" and imbalance (even if total forces are 0 for a full cycle) is the key. Everything today is built to minimize vibration...

Good luck everyone, The Gravmaster (miester?)

[Jonathan]

It is true that the apparent weight changes because of centrifugal force. For a wheel where the excentric weight is at 12 and falls clockwise to 6, the apparent weight as a function of the angular position from vertical is F=2W(1-cos(t))<sin(t),cos(t)>+W<0,-1>.

[Trev]

Georg, How do we use that to make a one directional wheel?

[Jonathan]

If it worked, there are many ways. Take a parallel beam balance like the one I drew in the other thread. Place the roller on one platform, and an equal but dead weight on the other. On the ends of the first platform, place stops with springs attached, so that the roller, once started, will keep oscillating back and forth. The centrifugal force will cause the whole device to wiggle, and this would be rectified by a ratchet. The device that the ratchet drives would have some mechanism to give the roller a little push now and then. The problem is that if the centrifugal force is exerted through any distance it causes the roller to loose kinetic energy. I see a similarity between this incarnation and the device that Madmax posted about.

[Georg Künstler]

next step is now to couple two eccenterrolers in the demostrated way.
one weight up, one down.
When siderolling the force on ground is constant, but each side has different weight at different time. Someone should pass the formula for this.

This coupled rollers had the name teeter tauter, I had asked for this name a long time ago on this board.

Next and last step if formula is available.

The future has begun

Georg

[Jonathan]

There is not enough information for a formula, it is necessary to know how it will interact with the rest of the device. For example, if both rollers interact with the same part at the same time, always, then the force is merely the weight. But if half the device is on one side of a lever, and the other half on the other side, then it will be a complicated expression, depending on a few more details.

[Georg Künstler]

more information to complete the formula.

the future has begun

Georg

[etjoe]

Georg, wow, you have some serious prototyping skills. Very nice work!

-e

[jim_mich]

Georg,
I see you used many wood dowels. This makes a rippled wash board effect when the inner wheels roll. Is this an intended effect? Are the ripples needed?

[Jonathan]

Well now it's too complex to come up with a good formula! If there were no dowels, and no bumps, would there still have to be springs in the teeter toter?

[Georg Künstler]

Hi Jim_Mich,
the rippels are needed for both wheels, uni directional and bidirectional.
Have a look to Besslers original drawing and you will see the dowels. Count the dowels.

to all,
of course we can use springs in the teeter tauter wheel. But this will make the formula more complex. I only asked for a formula for the teeter tauter without a spring.

the future has begun

Georg

[Trev]

the rippels are needed for both wheels, uni directional and bidirectional.
Have a look to Besslers original drawing and you will see the dowels. Count the dowels.
Georg

Hi Georg,
Which original Bessler drawing do you mean, I don't remember any with dowels.
Is the wheel complete now or are there other parts still to be added?

Trev.

[Stewart]

Hi Georg

Have a look to Besslers original drawing and you will see the dowels. Count the dowels.

The dowels/pegs could just be there to secure the stretched canvas.
However, post a video of your wheel turning and I might think otherwise! ;)

All the best
Stewart

[Michael]

Hey Georg,

Do you think maybe the dowels were really hollow, similar to organ tubes and the weights that that hit them actually caused a reverberation, maybe even a resonance effect, that this energy was then used in another way to power the wheel?


Reg.

Mike