i had seen on tv that if you put a coil around a plastic pipe you can charge it and use it like a solinoid is this correct. :?

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yup.

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yep

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A solenoid is a long thin coil of wire. Depending on the application there may be several layers of windings to the solenoid.
To produce this coil of wire, you need a former of some kind, on to which you can wind the wire.
Here the plastic pipe is the former.
As simple as that!

JimB

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At my coil gun i used the plastic tube of an ball pen.

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this is a long bit os drain pipe. and i have wraped around 3 core wire.
will a car battery do? it don't work. if a put a magnet on top if just twitches when i put current throught the wire any ideas? :?

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How many turns of wire have you put round?, you need a LOT!.

There are many sites about coil guns, try reading a few.

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im not quite sure, i have done half the pipe with 3 core wire. there is i layer if tha is what you mean.

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I just made an coilgun yesterday and its still asembeld on my desk.

Capacitors are the key!

I used four 10 000 uF 64 V.I got an iron rod flying at 30 km/h

I had to put some heavy stuff on the platform to keep it from sliding backwards and off the table.

The capacitatator are in a voltage dubler and are charged to around 100V i have an 0,2 Ohm coil so there is about 500 Amps of curent rushing trough the coil.I used 1 mm wire and it got a litle warm after fireing.

You can see a comented photo of what did in the "show us your workbench" topic

I can tell you more if you want.

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This is how it looks like to switch 500 Amps whith two coper wires.

I now put the switch in a cardboard box so that the bright flash dosent blind me.

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i could never charge it to 500 amps. at 100v i have a 19000 MFD cap.
and a 22000 uF cap will they do on a car battery?

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could a use a rectifier to carge some high voltage caps and use that?

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That's not much of a solenoid!, it won't generate much of a field at all.

You might notice that other people are using ball point pen sized tubes, LOT'S of coil windings, and 100V capacitors with discharge currents in the 100's of amps.

This is a far more realistic approach, by using a drainpipe and three core mains cable, you probably couldn't afford to buy the wire to make a decent coil?.

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U used an ball wiret tube and about 3 m of 1mm wire for the coil.

To get the same power you wod need silishly low resistance coils and horibly high curents.

Tell me the values and voltages of big caps that you have.

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30v

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