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Look hereï¼Œa reluctance coilgun design from China

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coilgunner

Tue Mar 29 2011, 04:04PM

Registered Member #3788 Joined: Sun Mar 27 2011, 12:28AM
Location:
Posts: 11

Turkey9 wrote ...

I'm currently working on an induction coil gun between other projects. I've seen it mentioned in theory but have only seen one that has been built, the one that was posted previously. Pity, IMHO.

""
Sry,I don't understnd the word "it" in your sentence"I've seen it mentioned in theory..." and the meaning of "Pity, IMHO".
Could you explain it for me?
Then,if "the one"means induction coilgun,I have known many of its kind.For instance,the Sandia National Lab in America,they have been leading the world's coilgun developing for nearly 25 years.

Barry

Tue Mar 29 2011, 07:48PM

Registered Member #90 Joined: Thu Feb 09 2006, 02:44PM
Location: Seattle, Washington
Posts: 301

Here is another induction coilgun with research project details that you may find quite helpful: Pulsed Linear Induction Motor by Braam Daniels in South Africa. Download his PDF and settle in for a nice long read.

Cheers, Barry
BTW - Trolls, dont bug me. Ur flames will only roast my marshmellows and I laff at ur failure. 8DD

Turkey9

Tue Mar 29 2011, 10:42PM

Registered Member #1451 Joined: Wed Apr 23 2008, 03:48AM
Location: Boulder, Co
Posts: 661

Sorry, by "it" I meant an inductance coilgun. "IMHO" means "in my honest opinion". I think it's pity because it's a promising type of accelerator that has not been worked with much in the hobby world other than disk launchers.

Barry: Thanks for the link! I saw that project on your site years ago but had forgotten about it!

coilgunner

Thu Mar 31 2011, 05:39AM

Registered Member #3788 Joined: Sun Mar 27 2011, 12:28AM
Location:
Posts: 11

Turkey9 wrote ...

Sorry, by "it" I meant an inductance coilgun. "IMHO" means "in my honest opinion". I think it's pity because it's a promising type of accelerator that has not been worked with much in the hobby world other than disk launchers.

Barry: Thanks for the link! I saw that project on your site years ago but had forgotten about it!

Thanks for your explaination.
Another question:how could I upload my pictures and make it seen by others?(I have uploaded two,but now it cann't seen even by myself)

coilgunner

Thu Mar 31 2011, 05:42AM

Registered Member #3788 Joined: Sun Mar 27 2011, 12:28AM
Location:
Posts: 11

coilgunner wrote ...

Thanks for your explaination.
Another question:how could I upload my pictures and make it seen by others?(I have uploaded two,but now it cann't seen even by myself)

1301550142 3788 FT111672 P Large Mjde 7b31000a9b375c41

1301550142 3788 FT111672 P Large Ne1w 51150003df7a5c44

1301550142 3788 FT111672 P Large 1dro 3a99000097dc5c43

guitarlord66

Thu Mar 31 2011, 08:12AM

Registered Member #1805 Joined: Sat Nov 08 2008, 06:29AM
Location:
Posts: 67

That looks great! Do you have any video's of it in action?
Also I find it strange the way you made the projectiles.

Turkey9

Fri Apr 01 2011, 04:24AM

Registered Member #1451 Joined: Wed Apr 23 2008, 03:48AM
Location: Boulder, Co
Posts: 661

You'd probably get a few more m/s if you didn't make the projectiles look like rifle cartridges. You want the full diameter of metal at the front of the projectile to minimize the air gap between it and the coil. Try just a simple cylinder with a flat from or slight taper.

coilgunner

Fri Apr 01 2011, 05:19AM

Registered Member #3788 Joined: Sun Mar 27 2011, 12:28AM
Location:
Posts: 11

Turkey9 wrote ...

You'd probably get a few more m/s if you didn't make the projectiles look like rifle cartridges. You want the full diameter of metal at the front of the projectile to minimize the air gap between it and the coil. Try just a simple cylinder with a flat from or slight taper.

Yeah,you're right,we use a projectile with a flat top and with this kind we got 30%more efficiency than 9% at present.The following picture will show its shape.

coilgunner

Fri Apr 01 2011, 05:20AM

Registered Member #3788 Joined: Sun Mar 27 2011, 12:28AM
Location:
Posts: 11

Ehh,I will upload my shooting video about a week later.

haxor5354

Fri Apr 01 2011, 11:48AM

Registered Member #2063 Joined: Sat Apr 04 2009, 03:16PM
Location: Toronto
Posts: 352

how heavy is the coil gun it self? looks as big as the size of the table

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