David Diamond Gravity Wheel

[jim_mich]

David Diamond Perpetual Motion Gravity Wheel

Look at this closely. I DARE YOU to tell me it won't work!

http://my.voyager.net/~jrrandall/PatentUS3934964.htm

The patent has expired. Anyone can build it. With a little engineering improvements I think it could be a viable product. The improvements might be patentable.

[Jonathan]

It doesn't work. All I can say is that it has something to do with the increase of pressure with depth, but I don't know why, I'm not good with bouyancy stuff.

[jim_mich]

I just spent the last two days crunching numbers and I say it works. I found it referenced on another site and they used the law of conservation of energy to prove the open ended version won't work. They used some formulas that were based on conservation of energy. And if you make the assumtion that energy out MUST equal energy in, while ignoring the potential harnessing of gravity, then of course the equations must balance to zero.
They make a snide remark about how the inventor could have saved his money.
Their equations used the open cylinder version. But David's closed cylinder version is undisputable. THAT is why the patent was issued. Ether energy in the form of gravity can be harnessed by this device. If everyone is told it won't work then no one builds it. If an investor asks his scientist consultant if it would work, what do you think the consultant would say? He would say perpetual motion is impossible, don't put any money into it.
Poor David was doomed before he got started.

I will build it. It may take me a while but I will build it.

[jim_mich]

Number crunching time...

Pistons 4 inch diameter x 4 inches thick made of steel. (less toxic & less costly than lead)
Piston end surface area = R^2 * pi = 12.566 sq.in.
Piston volume = R^2 * pi * L = 50.265 cu.in.
Weight of steel = .2816 Lbs/cu.in.
Weight of piston = V * Wt_cu.in. = 14.155 Lbs. if using steel.
Weight per piston each square inch = Wt / A = 1.126 psi
Weight of H2O = .0361 Lbs/cu.in.
Height of posible water column = psi / Wt_H2O = 31.202 inches
With two pistions, one pushing, one pulling = x2 = 62.404 inches = 5.2 foot column water.
Allow about 15 percent for losses = 54 inchs = 4.5 foot column water.
We will make the center to center sprocket distance 4.5 foot.

How far should we allow the pistons to travel?
Lets say 4 inches, same as piston length.

So we push/pull 50.265 cu.in. of water on each rotation.
Weight of water pushed/pulled = cu.in. * .0361 = 1.815 Lbs. each unit.

We space the units 6 inches apart.

Number of units per side = 54 inch water column / 6 inch spacing = 9
Weight of water shifted = 1.815 * 9 = 16.335 Lbs.

We use a pulley about 8.5 inch diameter would allow 4 pistons all around pulley.
We will need 11 units, 22 pistons.

Torque = Wt_on_rim * R = 69.423 in.lbs. torque

Now how fast would it turn? That gets more complex. How fast can gravity accelerate the pistons and the water? How much inertia is involved? How big are the pipes? How much resistance to the water flow? How much friction? My poor brain is starting to melt.

I did not double checked the numbers. Could be errors. No guarantee.

This is a simple gravity wheel just like a water wheel. I stand to get 'egg on my face' if I'm wrong. Put I'm sticking my neck out here. I feel confident.

[MrTim]

Hmmm....
You might want to get a copy of "Curious Mechanical Movements" (Lindsay Publications)
They have a lot of these (non-working) buoyancy-type machines in the PM section. Congreve's sponge machine is, well, strange....

Desaguliers demonstration is also in there (required reading/understanding in my opinion), which can also be conveniently found in the 'Ideas' section of this very website!

[Patrick]

Go for it Jim!
Keep us posted on the progress. Maybe you will find a new and improved version.
--Patrick

[Jonathan]

Hey all, I massivly misunderstood how it is supposed to work, and I think that if it works, I have an improvement: no chain!
All you need to know is that none of the pipes connect to a pipe that has a different letter.

[grim]

Hi Jim

I think he's moving volumes of air in the cylinders, not water. Reminds me of a toy called the Cartesian Diver Doll. A little doll of a diver with an air bubble trapped inside went into a tank of water filled completely full and sealed with a flexible membrane. At rest, the diver came to the top. If one pushed down on the membrane he pressure transferred to the diver's air bubble thru the water, compressed it (less volume) and the doll sank. Let off the membrane, the doll rose as the air expanded (more volume).

If the pistons, as it seems here, are switching volumes of air between them on opposite sides of the fluid filled chamber, then you are correct and there's a real good chance that it works.

Regards

grim

[jim_mich]

I also thought of just a wheel. It has its advantages being simpler, but less efficient. You want the 'tip over' location to be close to the top and bottom, which a chain or belt would do. But it might work as a tabletop 'proof of concept' model.

I've got a few ideas for improvements but will keep them quit for now. I would love to tell all about the improvements but now is not the right time.

I'm working out details for a 'proof of concept' model that anyone with access to a machine shop could build. Am trying to make everything as simple, plain and inexpensive as possible. I tend to want to complicate things. Keep it simple. I must remember, keep it simple. If I can eliminate any machining and use stardard parts, I will.

If the 'proof of concept' model works I'll make a whole bunch of them so anyone who doubts can be shown one.

[jim_mich]

Jonathan,
A wheel version will not work. I'm concerned now whether a chain version will work.

Look at where the center of gravity is for the combined weight/fluid and it is then plain the as the weight drops and the fluid rises the center of gravity of the two combined also drops.
Look at the two pictures I'm posting. The dot representd center of gravity of the weight/fluid.

[jim_mich]

Ah Ha!! Caught you! The above is wrong!! The wheel will work!
This is the logic that that other site was using. They even infected my thinking for a moment.

I'll show you why next post. I need time to compose with real numbers.

[jim_mich]

Please forgive me! I must stick a big gag in my mouth. Nothing sinister. But you see I'm an inventor. And I know what I can say freely and what must be kept quiet until patents are filed. Believe me when I say I've made a big break thru today. I've only run rough test so far. I'll be building working models over the next few weeks and months. Sorry to leave you all for a short time. I'll be lurking but not posting much until I can release all at the right time in a positive manner. I will do my very best to make sure 'the secret' is not supressed and is fully revealed.

I'll be back!!

[Jonathan]

By rough test do you mean you have a working model, but it is very crappy?

[Stewart]

Hi Jim & Jonathan

Bessler also experimented with buoyancy. In MT108 he uses weights and pockets of air in similar way to what you've been discussing here. In his design the inflated pocket at the top emerges from the water and becomes fully deflated by the weight before entering the water again.
Jim - I hope you're progressing well with your own experiments.

All the best
Stewart

[TommyK]

Sorry to burst your water bubble, but it won't work.
Water always finds it's level and so too does this device.
I have built numerous buoy wheels and they all come to level.
Now this Bessler wheel on the other hand will work.