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Look hereï¼Œa reluctance coilgun design from China

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LAN_403

coilgunner

Sun Mar 27 2011, 02:20AM

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

Hello everyone,I'm a student from China and now study in HIT(Harbin Institute of Technology,she is one of the most famous university in China which is major in military weapon design).
Last yerar I and 2 other classmates of mine envolved in a project which called"Reluctance Coil Launcher"ï¼Œwe have been working on this for 7months and now it is coming to an end.
1 We have 4 stages to accelerate a projcetile weights 55g(it is made of steel);
2 We totally use 27 capacitors to discharge the projectile.
9 for 1-stage(it has 3 groups in parallel connection and in each group there are 3 capacitors in series connection)6 for 2-stage,6 for 3-stage,6 for 4-stage.
3 Each capacitor has a parameter of 450V--1200uf(but we only charge one capacitor to 400V)
4 We use 220V/50Hz alternating current through a 220V--1300V transformer and a brtdge to charge the capacitors.They totally stores 2k Joules.
5 We use SCRs and have no cut-offs during launching.
6 We have a coil sheath made of steel around each coil to strength the magnetic field.
7 Each projectile has a diameter of 14mm and a length of 80mm.

Yesterday,we made a experiment and got some datas as following says.
1 It reached a speed of 82m/s(we choose the fastest data in all 10 shoots)and had an kinetic energy of 180J.
2 It had a efficiency of 9% totally(I think it is not a low efficiency)
3 We spent 105 pounds on this project(really cheap,Ehh?)

OK ï¼ŒI think this data will make our professor having a happy day.

Now I have some questions to ask you,my friends in Westen countries.

1 Could anyone tell me the data of the highset efficiency and highest kinetic energy in this Forum?(I have only heard of Donnie James'127 Joules shooting)
2 I have poor German/Russian,so I have no mind on theâ€œCoil Launch Fieldâ€in those two countries.Could any gentlemen do me a favour to tell me some datas of them?
3 My English is not good,but I dare to write this thread in this forum,I want to join all of you and be a friend of you.

The last word of this thread,I want to say it in Chineseï¼šå‹‡å¾€ç›´å‰ï¼ï¼ï¼ï¼ˆmarch forward courageouslyï¼‰
I have uploaded some pictures,could it be seen by others?

P Large MjDE 7b31000a9b375c41

Turkey9

Sun Mar 27 2011, 05:35AM

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

That sounds like quite the project!!! As far as I know, 9% efficiency is the highest I've seen on the forum. I did see >10% somewhere as a grad project. I'm not sure about the kinetic energy though, as you can get really high KE with a heavy projectile. You've also have one of the fastest guns that I've seen. I've heard about one that broke 100 m/s but have never seen documentation on it.

Could we get some pictures of this beast?

coilgunner

Sun Mar 27 2011, 10:25AM

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

Turkey9 wrote ...

That sounds like quite the project!!! As far as I know, 9% efficiency is the highest I've seen on the forum. I did see >10% somewhere as a grad project. I'm not sure about the kinetic energy though, as you can get really high KE with a heavy projectile. You've also have one of the fastest guns that I've seen. I've heard about one that broke 100 m/s but have never seen documentation on it.

Could we get some pictures of this beast?

Thanks for your reply,Turkey9,I've seen you in many threads.
Several days laterï¼ˆmaybe 2~3daysï¼‰ï¼ŒI will upload the photos of the â€œbeastâ€ã€‚It depends on how busy we are in future couple of days.
Emm,there is a forum in China which talks about Electronic Weapons,just like 4HV,but in none of us have made or seen an "Induction Coilgun"design there.
How about 4HV?Is any one here have been making an "Induction Coilgun" yet?
Btw,do you know some situations in Germany and Russia?

haxor5354

Sun Mar 27 2011, 01:48PM

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

Harbin Institute of Technology? å“ˆå°”æ»¨å¤§å¦ï¼Ÿ

Zero

Sun Mar 27 2011, 04:55PM

Registered Member #3588 Joined: Sat Jan 08 2011, 11:19AM
Location:
Posts: 36

Even if you are not able to read, the pics speak for themselves:

Godfather of Induction Coilguns AND homemade lasers (pulslaser.de)

coilgunner

Mon Mar 28 2011, 02:00AM

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

haxor5354 wrote ...

Harbin Institute of Technology? å“ˆå°”æ»¨å¤§å¦ï¼Ÿ

Hey,man,it seems that you know some Chinese!

H.I.T.means å“ˆå°”æ»¨å·¥ä¸šå¤§å¦ã€‚

Your translation have missed the word Technology which in Chinese means ç§‘æŠ€/å·¥ä¸š.

coilgunner

Mon Mar 28 2011, 02:01AM

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

Yes,I have been trying to read the meaning of threads through their pictures,however,I could not see every picture,some of them says"It couldn't be read"ã€‚I don't know why.

haxor5354

Mon Mar 28 2011, 12:20PM

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

coilgunner wrote ...

haxor5354 wrote ...

Harbin Institute of Technology? å“ˆå°”æ»¨å¤§å¦ï¼Ÿ

yep, i know my Chinese because I've spent my first 10 years in China

Turkey9

Tue Mar 29 2011, 07:02AM

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

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.

coilgunner

Tue Mar 29 2011, 03:56PM

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

haxor5354 wrote ...

coilgunner wrote ...

haxor5354 wrote ...

Harbin Institute of Technology? å“ˆå°”æ»¨å¤§å¦ï¼Ÿ

yep, i know my Chinese because I've spent my first 10 years in China

Oh,that is great!I have found a person who had been lived in China.Ehh,I really want to know some opinings in your mind about China and Chinese people.
You can also begin our conversation privatly through message in this forum,shall we begin it?

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