Tesla & Power transmission

1956 - on a farm without streetlights or electricity close to the med wave AM and short wave radio transmission towers. A 40 watt florescent tube glowed sufficiently to be able to read.

At that stage my dad had a book published in 1935 that believed it would be possible to power a train via Tesla transmission,

It depends on whether you're interested in efficiency. Charging the battery in an implanted medical device doesn't require high efficiency. Powering your house does.

Agreed! I am never against research, but to even hint at wide spread use at the efficiency levels they a currently achieving, they better stop even talking about the efficiency levels of current automobiles and appliances. -- JHF

Yep. Dental fillings have been receiving am radio stations for almost a century now. Just not much efficiency there.

Tesla was very smart, but sadly went down the broadcast power blind alley. What killed it was the need to have a sufficient power density inside the radiative sphere so that an anenna would have enough aperture to intercept enough power to operate the device.

One of the Lyn references spoke of 40% efficiency at running a 40W bulb. This was between with 60cm between the powered coil and the receiver coil.

In his experiments Tesla ran right into this problem, and was defeated by it, as we are today. I think it will only work with 'gimmick' solutions. I see all manner of people yapping about their success where Tesla failed. In fact he did not fail at low power/small distance solutions, he did as well as they do today, more or less.

We will never see freight trains run by broadcast power...the losses would be too large for economic viability. Of course, if power is free and you can waste 99.9% of it you could create a field a few miles across where power could be drawn from that field with a coil. The power density might be risky to people/birds/small animals...

Never say never.

Electric Power concentration is being studied.

Arturo Pérez

What about the people that claim that magnetic fields from power lines gives them head aches and cancer?

I know that we are already immerse in a soup of EM (Electro Magnetic) waves but its density will have to be increased when we will power all our gadgets from the air. What will the health effect be? Are we playing with fire?

Note that Tesla himself exposed to intense electrical fields didn't have a very healthy end of life. Were his mental problems caused by stress or EM fields? We don't know but should thread carefully before engulfing us in even denser EM fields.

yes, we might not like living in a field where one kilowatt could be drawn from the field with a 1 foot coil. Runner might experience shorted turn blood heating, horses might be pushed sideways at racetracks and bees would fly in spirals ( as in a cloud chamber...I realize the allegory is not precise), and birds would break new ground. We would also be free of overflights by aircraft

I think the car's exhaust gases are more dangerous than EM and there is so far no any real proof that EM is bad for human body.

Seriously, it's hardly a dream; it's been done many times. But, it's not very practical for general use.

I remember an old Mennonite farmer nearby who was caught stealing borrowing power from the high tension lines on his farm by induction coil. This was the late 60s.

I worked on a project in the NIH 6T MRI facility in the 90s. We desperately needed to drill a hole. The MRI staff told us we'd need to sacrifice a drill. We took one in, it turned on by itself, it ran at probably 10000 RPM, and it burned up after about 20 seconds. Impossible to control except by moving around in the field.

In the 80s, I built a large air core transformer for transit use. It was about 60% efficient.

In the 60s, I worked a few days in a grid tie-point substation that had lost it's ground during the big blackout. Everything in there was powered, including things like the gas tanks of the trucks. Not a very safe place.

So, in general, why do it?

So,is there a hope to run electrical cars in the future in the streets receiving their electrical power via transmission through air ?

Is it a good idea?

Good prophecy,but it will be fulfilled

But the body of the car should be electromagnetic wave protected to protect the driver.

Any car manufacturer going to use the "Guest"s idea should first get a permit from him for his idea.

If you can power a car with 500mW, maybe.

No. Not in any practical sense.

I think this project can be use practically in the high ways(free ways)where there is no population, and through small streets the car's charged battery can be used.

Isn't that called "radio"?

I am personally consider Nicolas Tesla is the greater scientist not Albert Einstein ?

How many member agree with me?