A wind-powered, Magnetic rail car(?)

1. Nov 30, 2011

deathbymanga

I have an idea where a car can be lifted up using magnets and sent forward using wind, but I'm not a licensed Engineer. So I was hoping I could get some help from these fine colleagues of mine.

Say two magnets are positioned at a perpendicular angle away from each other and inside the angle would sit the car. The cement that lines our roads would have iron molded into the material so as to provide a magnetic field. Can Magnets emit a Diamagnetic field, so as to repel the iron, instead of attracting it?

The only problem I have is that unless I put another magnet behind the car, the car will have no logical way to move forward while suspended in mid air. and if the car cannot move, no wind is made, and ergo, so wind-power.

...

But what if I put a propeller on it to blow wind into a sail to send it forward. There could be a turbine underneath that collects passing wing wind, while it moves forward like a boat.

2. Nov 30, 2011

Staff: Mentor

Welcome to the PF.

Here is a pretty good introductory article to magnetic levitation for transportation:

http://en.wikipedia.org/wiki/Maglev

There are several ways to make the car move. You could put a sail on it and use the ambient wind (is this what you are suggesting?), or you could carry batteries or fuel to run a propeller or turbine for propulsion, or you could use the electrical techniques discussed in the article to provide the propulsion.

3. Nov 30, 2011

deathbymanga

I was thinking of using a propeler to blow wind into a sail using electricity to power the fan

4. Nov 30, 2011

Staff: Mentor

If the fan is mounted on the ground, it will blow the vehicle a little ways until the vehicle moves away from the fan's wind. You would get no net motion if you mount the fan and sail both on the vehicle. You could get net motion if you mount the fan on the vehicle and point it away from the vehicle (no sail involved).

5. Nov 30, 2011

deathbymanga

wind would get blow from the fan and hit the fan, isn't that how it works?

6. Nov 30, 2011

Staff: Mentor

7. Nov 30, 2011

deathbymanga

I meant fan blows and wind hits sail, but then is there a way to propel the car any other way?

8. Nov 30, 2011

Staff: Mentor

As I said in post #4, if the fan and sail are both mounted on the vehicle, you will get no net force to move the vehicle. The fan has to be pointed away from the vehicle as shown in the picture to generate a net force.

I mentioned a couple other ways to move the vehicle in my post #2. Have you read the wikipedia article yet?

9. Nov 30, 2011

deathbymanga

yes, but the only difference is that the trains are on tracks. My proposal is to place magnets capable of emitting a Diamagnetic field under the car and line the roads with iron so as to preserve the amounts of magnets and create a more free-range transportation system.

can a propeller send a car through the air if the car has no friction?

10. Nov 30, 2011

Staff: Mentor

There is no such thing as a diamagnetic field, AFAIK. You need to read the wikipedia article about how maglev works.

Do planes fly?

11. Nov 30, 2011

deathbymanga

I read some, the thing was long.

And diamagnetic is real, but I got the definition wrong, Diamagnetic controls non-magnetic metals like gold and mercury.

But a normal magnet can repel? And how fast does a fan have to spin to push a free-floating car?

12. Nov 30, 2011

Staff: Mentor

Yes, there are diamagnetic materials, but not diamagnetic fields, AFAIK.

It would spin about as fast as it does for fan boats like I posted the picture of. Fan boats use gasoline-powered engines to drive the fans.

13. Nov 30, 2011

deathbymanga

but an electric fan will work just as well right? how fast can a free-floating car move if it is propeled by winds moving at such speeds?

14. Nov 30, 2011

Staff: Mentor

You will have the propulsion from the fan, and wind resistance holding you back. The terminal velocity of the vehicle will depend on how powerful the fan motor is, and how much wind resistance there is. Again, think airplane...

15. Nov 30, 2011

DaveC426913

As fast as a hovercraft or fan boat.

But why bother with a fan? It's not very efficient. You've got a connection with the ground (via the magnetic field), why not use it?

16. Nov 30, 2011

deathbymanga

well, how fast can a car with a fan spinning at 600 RPMs move?

17. Nov 30, 2011

deathbymanga

And do what, mix a magnet to the back and front to make it go in those directions?

18. Nov 30, 2011

DaveC426913

Kind of depends on the size of the fan now don't it?

19. Nov 30, 2011

DaveC426913

Just do a little reading on maglev. It covers levitation and propulsion in one swell foop.

20. Nov 30, 2011

deathbymanga

can't you explain it to me? it is very long and boring

21. Nov 30, 2011

DaveC426913

Perhaps you should take up a hobby that is more interesting to you.

22. Nov 30, 2011

deathbymanga

and you need a coil in the ground to propel the car forward, that devoids the purpose of the car. it is designed to move with iron implanted in the cement

23. Nov 30, 2011

deathbymanga

thinking and listening is fun reading and writing is boring

24. Nov 30, 2011

DaveC426913

Alas, thus is the route from childhood 'play' to adult 'do'.

You will accomplish very little in your life if you choose not to get educated at the things that interest you.

25. Nov 30, 2011

deathbymanga

well, how does this adult here explain how propulsion is made possible without propulsion coils