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Hybrid ThorJack

Post questions and info about hybrid (compressed gas with fuel) powered cannons here. This includes discussion about fuels, ratios, ignition systems, build types, safety, and anything else relevant.
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Unread postAuthor: Petitlu » Sun Jun 17, 2012 2:06 pm

:D :D

But given the preparation it takes, I will do more shooting on the same day!
Besides, I have regretted not having had two missiles ...
and I will have to buy another aquarium!
:lol:
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Unread postAuthor: jackssmirkingrevenge » Mon Jun 18, 2012 2:45 am

I has tungsten!

Roughly 3mm by 20mm, average weight of 1.52567g grams according to the laboratory balance... expect some miniature APFSDS shortly ;)
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Unread postAuthor: Petitlu » Mon Jun 18, 2012 2:51 am

Great!
you got your order!
1.5g is light compared to my rod 20g!
diameter is a bit like concrete nails ...

Need to try a APFSDS! :D
Delrin with a sabot?

EDIT :
http://cgi.ebay.fr/4-Pure-Tungsten-Rod- ... _504wt_899

:cry:
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Unread postAuthor: jackssmirkingrevenge » Mon Jun 18, 2012 3:31 am

Petitlu wrote:Great!
you got your order!
1.5g is light compared to my rod 20g!
diameter is a bit like concrete nails ...


Well they're much smaller, by expect some good results at high velocity :)

Need to try a APFSDS! :D
Delrin with a sabot?


Not sure if I will make plain brass or delrin fins, or a whole brass body with a tungsten core like I did for your last projectile.

http://cgi.ebay.fr/4-Pure-Tungsten-Rod-Electrodes-1-4-x-1-1-2-Tesla-/360423701788?pt=BI_Circuit_Breakers_Transformers&hash=item53eaed3d1c#ht_504wt_899


These are more expensive than the ones you bought though no?
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Unread postAuthor: Petitlu » Mon Jun 18, 2012 3:44 am

much more!
but this is pure tungsten
  and not carbide ...

http://www.ebay.com/itm/5MM-X-50MM-ROUN ... _500wt_969
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Unread postAuthor: jackssmirkingrevenge » Mon Jun 18, 2012 4:11 am

... but tungsten carbide is better! In armour piercing ammunition this is the alloy they use ;)
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Unread postAuthor: Petitlu » Mon Jun 18, 2012 4:18 am

:?: :?:

I thought that tungsten was more appropriate because it breaks not as carbide!
the rod would remain whole and could penetrate further into the target ...

EDIT :
http://cgi.ebay.fr/3-8-dia-X-1-825-long ... _975wt_946

35USD USPS ! :cry:
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Unread postAuthor: jackssmirkingrevenge » Mon Jun 18, 2012 4:38 am

Petitlu wrote:I thought that tungsten was more appropriate because it breaks not as carbide!
the rod would remain whole and could penetrate further into the target ...


Not really, even in a relatively pure form it is still brittle and prone to shatter on impact.

The results you have happen with real world armour piercing cores too as in the images below showing a 25mm APDS projectile. The difference is that they are usually travelling in the 2000 - 4000 fps range, so it has a lot more energy that allows the fragments to punch through thicker plates.
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Unread postAuthor: Petitlu » Mon Jun 18, 2012 5:03 am

ok!
I stay with the carbide then! and it's cheaper ...
I still have five rods of tungsten

Disk brake I shoot with:

concrete nail
Delrin wing-tungsten +
-point bow with aluminum skirt

No lead bullets!
:D

Note, a lead bullet with a concrete nail in the center ... :twisted:
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Unread postAuthor: jackssmirkingrevenge » Mon Jun 18, 2012 5:52 am

Petitlu wrote:concrete nail
Delrin wing-tungsten +
-point bow with aluminum skirt


Looking forward to those :D I think the high speed camera should be looking down the barrel, that's where the guaranteed action is ;)
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Unread postAuthor: Petitlu » Mon Jun 18, 2012 5:58 am

Profile is good too ... when there is no dust!
:D

http://www.youtube.com/watch?feature=pl ... sOWkwr45H8
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Unread postAuthor: jackssmirkingrevenge » Mon Jun 18, 2012 10:16 pm

Here's one of the sinkers compared to a 6mm airsoft BB, quite tiny but it should give some interesting results:
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Unread postAuthor: Petitlu » Tue Jun 19, 2012 12:00 am

I think too!
and you're going to shoot with any gun ?
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Unread postAuthor: jackssmirkingrevenge » Tue Jun 19, 2012 12:35 am

Petitlu wrote:and you're going to shoot with any gun ?


This one, probably with a sabot in a 1/2" barrel.
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Unread postAuthor: Petitlu » Tue Jun 19, 2012 12:48 am

I doubted that it was this hybrid!
:D
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