Marquess of Worcester

[agor95]

https://youtu.be/QyRPgUwbqQ0

I don't know how he really does it, but it's not bad. :)

A++

Very Good and Magnificent.

I just need too carve out the inside.

Regards

[agor95]

... here is where I did an early investigation into cams. The same principle applies. The forces are reasonably easy to calculate.
viewtopic.php?p=74506#p74506

Thank you for linking this valuable resource material.

There are several main negatives and this leverage issue / cams is one of them.

The lifting of the weights is simple. So long as you move a weight way from the inner position and back again on the downward side.

This little imbalance pumps up the rotation rate.

That will balance the wheel and a new weight will be available at the top.

Regards

[agor95]

The description of the Marquess' wheel makes no sense to me. Why would you want the weight to move further from the center after passing the diameter line of the lower side? Is the line horizontal or vertical? Also he uses the word 'hung'. So I suspect it is a simple corded OB wheel.

I am really ropey on hanging weights. Just trying to calculate the force vectors etc.

Odd, I posted a relpy to your quote but it does not seem to be present?

Anyway the diameter line is more likely to be horizontal.
The further from the center makes sense if the hanging weight could swing like the first image but the second image with confined weights has useful qualities.

Note. The weight at the top has been accelerated laterally and then is decelerating. That can be seen more in the bottom right quadrant
in the first image.

Regards

[agor95]

Here's a pic of the Marquis's wheel from the Ord-Hume book mentioned in earlier threads about this wheel.
...
In many ways this very simple and easy to follow illustration drives the message home, or should do !

It looks like three weights should be the minimum number that can be used.

It does beg the question did Bessler do the same with eight?

Regards

[Tarsier79]

No, because it doesn't work. One of the problems, the weight doesn't magically suddenly hang from the other point. The other suspension point has to lift compared to the weight, the rotation of the wheel lifts the weight. Even if there is positional over-balance, the negative torque of lifting each weight into position will counteract most, if not all positive torque.

[agor95]

Thank you for your reply for it is what most readers would post.

I am looking at a simplified version of the Marquis' Wheel.

That will help too confirm the above understanding.

Regards

[vlmmoa55]

It does beg the question did Bessler do the same with eight?

Regards

8 is not a random number

there is a reason for this (part of a principle)

there are still some parts of my project being delivered

it's coming soon and as soon as it's ready, I'll put everything on the forum

[Sam Peppiatt]

agor95,

The problem is; if you turn the wheel a little bit there are 18 weights above the axle, and 22 below it. Which means it wont work--------------------Sam

[agor95]

agor95,

The problem is; if you turn the wheel a little bit there are 18 weights above the axle, and 22 below it. Which means it wont work--------------------Sam

Have you calculated the torque for each weight so you can confirm they cancel out?

Well I am reducing the wheel design to 3 compartments.

Then we can confirm this understanding.

Regards

[Sam Peppiatt]

Hi argo95,
No, I have not. What a fantastic wheel it must have been------------------------------------------------Sam

[WaltzCee]

8 is not a random number

This is true. There are 8 significant rates of change in torque in a full circle.

Even if there is positional over-balance, the negative torque of lifting each weight into position will counteract most, if not all positive torque.

That has been the death of many excellent designs.

I suppose that is the real problem to solve.

Lifting with a pendulum doesn't solve the problem.

[agor95]

This is an image below of the base structure of a simplified Marquis Wheel.

The 40 components on the second image have been reduced to 3 components. For aesthetic I have used the AP frame to connect the square components to the hub.

As the model is 3D and can be aminated and test readings taken then graphed.

I have all expectations the understanding posted will be supported.

P.S. I am working on the anchor point rope and weights.

Regards

[Tarsier79]

Agor, what modeling software are you using?

[agor95]

Agor, what modeling software are you using?

The modelling software I am using for this topic is 'GlowScript Offine'.

P.S. There are others in the tool box.

Regards

[Sam Peppiatt]

agor95,

Even if you give it the benefit of the doubt, there will be 19 weights above the center line and 21 below. Don't you see? The wheel will be bottom heavy / OOB by 100 pounds. There won't be any torque----------------------------------Sam