Prof. Eric Laithwaite Inertial Propulsion & angular momentum of gyroscope

[agor95]

I have pondered several topics around this area of interest.

1. A non-exotic gyroscope propulsion method for a vehicle [ground based].
[energy in equals propulsion out]
2. Gamma, beta & neutrino wind conditioning of quantum experiments.

3. Magnetic spin compared to gyro-spin.

4. Halbach Arrays and asymmetries in mechanical systems.

But that's just me.

Regards

[Grimer]

Well now's your chance to ponder Laithwaite's insights and the very simple explanations they give rise to.

It was you who first drew my attention to the Laithwaite image below.



Which is why I .......... thinking that like cloud camper you might be able to appreciate the significance of the 3rd derivative.

That propellor like image represents the relaxation of the dynamic strains, the 3rd derivative strain energy which is concentrated in the offset gyro and because the material of the gyro is so stiff, well below the threshold of discrimination. This relaxation reveals the presence of two countervailing moments which explain the gross slowing down of the fall and rotation.

I have touched upon this before with Blender images prepared by my grandson.

Below is a screenshot from his latest video.



And here is the link to that video.

It shows the path of a 360° pendulum in the gravitational wind where the internal 3rd derivative strain energy is allowed to manifest itself as deformation if the pendulum bob is dynamically "annealed", so to speak.

The only thing missing is the 3rd derivative rotation of the red pendulum bob around the 2nd derivative path. Edwin hasn't been able to master that bit yet. :-)
Just as the 2nd derivative motion (acceleration towards the centre) is a right angles to the 1st derivative motion (velocity) so also the 3rd derivative motion (jerk, precession) is at right angles to the 2nd derivative motion.

You can easily make a model of this path by getting a length of plastic tubing, giving it a twist and joining the ends.

And as they say incookery programs. Here is one I made earlier.



The shear legs to hold the model up are made from bamboo kebab sticks and an elastic band. :-)

[agor95]

What I perceive in the first image is a rotating spring gyro.
The gyro is rotating away over the top and back along the bottom.

The gyro wants to rotate down due to it having more weight on the horizontal axis.

However like a front bicycle wheel when you learn to the right;
The wheel steers to the right.

That effect, in this case, causes a twist precession and the device rotates
around the stand. The gyro is moving towards us.

Now this twist movement causes the gyro to twist upwards.
Like the bicycle learning back up to vertical.
That is nutation in action.

So there are three partial differential equations lurking out there.

Also the overall weight of the device does not change in operation
or static. It's all conservation of momentum and rotational torque.

There is a possibility a combination of rotation, precession & nutation are
contributing to create another force that reduces C.F. while it precesses.
That being a pulling more to the centre than pushing out combined with C.F.

However it is tricky to prove at this time.

[agor95]

The last comment of my last post could be check with a simple experiment.

This is for any members that have a gyroscope.

In E.L. lectures he had a gyroscope suspended on a rope.

This experiment did not run until the gyro span down.

So the low C.F. effect declared was not proven in my mind.

Could this be done by a forum member.

The question is expected C.F. against the actual.

A toy car as the movable stand might be better for this test.

Thanks.

[Grimer]

This is for ant members that have a gyroscope.

Spider members would be better. They could spin suspended by a thread. :-)

[agor95]

Ho that's good :-)

Some of Eric's demo's could have been more robust.

1. The tray of ice that was melting.
2. The platform on the edge of the desk.
3. The one above - gyro on a rope from the ceiling.

4. Not showing the propulsion of a trolley.

This last one is of interest.

[Grimer]

At least he focussed attention on looking at more than two dimensions.

The propulsion of the trolley with the gyro is interesting I agree. One is tempted to dismiss it when one finds that the trolley is moving in a great circle. But this is like dismissing the Ventomobile before realising that on has to provide two earths reactions, the obvious one of friction on the ground and the less obvious one of a "keel" moment to prevent the device from slowly rotating relative the the wind.

It's curious that the supports for the BW were wide apart for no apparent reason. Was this to counteract a precession moment I wonder

[Grimer]

The above is a land yacht carriage I've built from meccano. We are already getting some interesting results. I'll make a video when I get a holder and tripod for my Cubot smartphone.

[Grimer]

This is the link to my grandson's gyro kit that we're using as a motor.

[agor95]

Hi Good work

From memory the gyro needs to be on a pendulum, in-line with it's rotation axis.

The pendulum should move from side to side across the trolley.

The pivot point is on a post/mast.

The pendulum should be allowed to lift up due to precession as it swings one way.

The torque due to forced precession caused the torque to lever up the gyro. No weird floating here.

The forward momentum is created as the gyro drops from the lifted position.

It should be stopped from swinging in the other direction during the return swing across the trolley.

Keeling is prevented with the wheels being wide apart and extra weight
being carried.

Note. this is a class 4 M.P. - Energy in creates propulsion out.

Regards

[Grimer]

Hi Good work

From memory the gyro needs to be on a pendulum, in-line with it's rotation axis.

The pendulum should move from side to side across the trolley.

The pivot point is on a post/mast.

The pendulum should be allowed to lift up due to precession as it swings one way.

The forward momentum is created as the gyro drops from the lifted position.

It should be stopped from swinging in the other direction during the return swing across the trolley.

I think device you are referring to is the one shown shown in the Heretic video at 7'32" from the start.

Personally I thought that demo was rather underwhelming. The offset gyro on a model railway truck is far more impressive. Unfortunately I don't have a link for that. Does anyone?

[agor95]

Agreed

This first example triggered Eric on the Gyro path.

However it was the first and not the last.

The others are not to be found.

So be that person

Note this is not the design you should follow
http://www.youtube.com/watch?v=vYliuFLMIHY

Regards

[Grimer]

I've been testing my Cubot smartphone in preparation for videoing the gyro mounted on the 3 wheeled trolley.

https://vid.me/4ndp

Edwin was the cameraman.

Looking at the video I couldn't help thinking that it looked as though the trolley was darting away from some prehistoric bird (my hand) about to attack it. :-)

[Grimer]

Having now carried out a few experiments with the three wheeled trolley I can understand why Prof. Laithwaite was so puzzled by the behaviour of the offset gyro.

He failed to appreciate the significance of the enormous strain energy content and the fact that the strain energy can be lifted up the gravitational potential with negligible relative loss.

The natural orbit of the gyro disc is at right angles to the orbit around the tower. A 3rd derivative precession motion.

In terms of terrestrial motion it is a polar orbit rather than an equatorial orbit. It is interesting to wonder what the effect would be of the moon having a predominantly polar orbit rather than a predominantly equatorial orbit. Perhaps there wouldn't be a magnetic field to shield the earth from solar radiation inimical to organic life on earth. Perhaps the magnetic field is a manifestation of the strain energy developed in the earths solar environment.

[agor95]

Now that is a point.

The centre of gravity of earth/moon is just under the earths crust.

As a result we have two tides 1. the moon's attraction 2. caused by the earth's rotating around this Centre of Gravity.

Now is the second effect causing the iron core to rotate [technical term alert - sloshing around]?