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Posted: Sun May 22, 2011 9:44 pm
by DYI
ITWOTOPRTST: Assembled capacitor bank, tested new voltage divider, confirmed that what I now regard as "low pressure" does this to type L 1/2" copper tube:
(~2mL water heated by 3kJ pulse at 11kV. Burst pressure of the tube is ~7500psi)
Posted: Sun May 22, 2011 11:33 pm
by warhead052
DYI, all I can say to that is wow.
Posted: Mon May 23, 2011 1:40 am
by jackssmirkingrevenge
drex wrote:I had a go at making an APFSDS round this week.
Will you actually fire it, if so, at what
please say steel plate please say steel plate please please please!?
DYI, what is "low pressure" then
Posted: Mon May 23, 2011 10:59 am
by drex
Yea I'm gonna fire it! There's an old stove at my shop I'm going to shoot at tomarrow when I remember to bring my camera.
Posted: Mon May 23, 2011 3:19 pm
by Alster370
Posted: Mon May 23, 2011 5:22 pm
by Zeus
It appears so, but I'm not sure it would be fast enough. Not to mention hydraulic seals don't seal well with most gases.
However I could be completely wrong.
Posted: Tue May 24, 2011 9:17 am
by Labtecpower
I screwed up my backstop today
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Posted: Tue May 24, 2011 10:00 am
by Technician1002
Nice. I like the cannon recoil. It bounces off something and ends up forward of where it started. What did you use for a projectile?
Posted: Tue May 24, 2011 10:15 am
by Labtecpower
I placed the cannon against the doorstep, as I don't want to demolish my knees
I used the projectile shown on the previous page. It's a bullet with a stainless steel head, and an ABS body. A friend turned it at school, from some stuff lying around.
Posted: Tue May 24, 2011 2:21 pm
by drex
Shot slap thru a stove with my APFSDS round at lunch. It did not fly as straight as I had hoped, Ill upload the high speed when i get of of work.
entrance
exit
2X4 5 feet behind the stove
Posted: Tue May 24, 2011 2:57 pm
by dewey-1
drex wrote:Shot slap thru a stove with my APFSDS round at lunch. It did not fly as straight as I had hoped, Ill upload the high speed when i get of of work.
PM me all the dimensions and I can do a drawing to determine the CP (center of pressure). Please use decimal inches or metric for accuracy.
What is the distance from the nose tip to where the "rocket" balance point is? (CG center of gravity)
Posted: Tue May 24, 2011 5:57 pm
by drex
[youtube][/youtube]
Posted: Tue May 24, 2011 11:36 pm
by POLAND_SPUD
that looks like a direct effect of muzzle blast... next time use a gun with a smaller chamber
Posted: Wed May 25, 2011 8:16 pm
by ramses
POLAND_SPUD wrote:that looks like a direct effect of muzzle blast... next time use a gun with a smaller chamber
or a muzzle brake/flash hider type thing. To appease JSR, you could use a 55 gallon drum as a suppressor/silencer.
Posted: Wed May 25, 2011 8:29 pm
by the unit
also looks like the barrel wobble could have had an effect. also it looks like the sabot never discards, or it does so very late