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brass pocket rocket..

Built a miniature cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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brass pocket rocket..

Unread postAuthor: FORE!!!! » Sun Sep 06, 2009 2:35 am

Here is my attempt at a mini ,its made from x2 brass (5/8") caps,a brass (5/8") socket and has an aluminium internal (insted of 5/8" copper i used aluminium).
The barrel is solid brass tubing 2.2mm bore, and is piloted by a shrader.

The piston is made from brass tubing and is explaned in the diagram.

Any comments?
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Attachments
06-09-09_1656.jpg
full size
06-09-09_1654.jpg
mesuring up
piston setup.jpg
piston diagram,CLICK TO ENLARGE
piston setup.jpg (24.76 KiB) Viewed 1259 times
al-xg wrote:
I've used various things like cutting oil, silicone lubricant, even butter

jsr wrote:
This collection of containers on your bedside table must look very intimidating to any visiting young ladies

...but hey, lube shows you care;)
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Unread postAuthor: qwerty » Sun Sep 06, 2009 2:40 am

Looks sweet and very clean! hows performance?
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Unread postAuthor: FORE!!!! » Sun Sep 06, 2009 3:42 am

well as for performace i havent really shot it yet,im still waiting for the epoxy to dry :( i did get a lil impatient and pressurerise it to 50psi it held and i dry fired it and it worked ,so far im very happy.
will have better power stats tommorow.

ive worked pretty hard on this project and im hopeing for good results
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al-xg wrote:
I've used various things like cutting oil, silicone lubricant, even butter

jsr wrote:
This collection of containers on your bedside table must look very intimidating to any visiting young ladies

...but hey, lube shows you care;)
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Unread postAuthor: qwerty » Sun Sep 06, 2009 5:24 am

What pressures are you gunna run it at also for ammo try using shot from shotgun shells it should fit it realy well.
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Unread postAuthor: geardog32 » Sun Sep 06, 2009 10:53 am

i like the design, the way the piston slides over the pilot. i think a mini will be my next build since my last two have been fairly large.
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Unread postAuthor: FORE!!!! » Sun Sep 06, 2009 5:55 pm

@qwerty
id say in the 400psi range.
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al-xg wrote:
I've used various things like cutting oil, silicone lubricant, even butter

jsr wrote:
This collection of containers on your bedside table must look very intimidating to any visiting young ladies

...but hey, lube shows you care;)
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Unread postAuthor: spudtyrrant » Sun Sep 06, 2009 8:55 pm

man you are catching up with me too fast a couple months ago you were making mediocre combustions now your all the way up to high pressure piston valved cannons i got to say your really making progress :D
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Unread postAuthor: twizi » Sun Sep 06, 2009 9:21 pm

wow man thts shine and awsome next u should rebuild a marker gun like jsrs failure cannon
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Unread postAuthor: FORE!!!! » Mon Sep 07, 2009 5:49 am

And what on earth is jsr's failure cannon,maybe a link will clear things up..

as for performance now that the glue has dryed, is very impressive and alot louder than i thort it would be,but considering i shoot it at about 350-400psi that comes to be expected.

no real power test have been done ,altho i shot at a can about 3m away and it penetrated one side,if it was fixed im sure it would of exited the other side :?
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al-xg wrote:
I've used various things like cutting oil, silicone lubricant, even butter

jsr wrote:
This collection of containers on your bedside table must look very intimidating to any visiting young ladies

...but hey, lube shows you care;)
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Unread postAuthor: jmadden91 » Mon Sep 07, 2009 6:00 am

Too cool mate :D Love it
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Unread postAuthor: jackssmirkingrevenge » Mon Sep 07, 2009 6:52 am

geardog32 wrote:i like the design, the way the piston slides over the pilot.


Ditto, good job :)

And what on earth is jsr's failure cannon,maybe a link will clear things up...


Epic fail :roll: :D
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Unread postAuthor: FORE!!!! » Mon Sep 07, 2009 10:51 pm

Well considering jsr had the balls to admit to a failure i guess ill share my own failure, basically stupidity rather than pushing the limits of the device.

i wanted to basically create a similar device that i posted,a mini coaxial but a servicable one,its made from an oxygen flashback arrestor,and the piston WAS a .22cal shell casing, i removed the projectile from the casing , emptyed the residual gun powder and attached a sealing face to the back of the shell, i had been building the device all day and was quiet proud of my achievments ,so i thort id celebrate with a couple of beers and a few billies, at this point in time i was quiet out of it, so with the courage juice flowing,i decided to go and finish my product,all i needed to do was weld the shrader to the fitting that screwed into the back of the flash back arrestor and it was done,aleast i thort i would of been done,

once i fired up my mapp gas torch and began to weld the shrader in the fitting within seconds the residual gun powder that had stuck to the internal walls of the casing blew up inside the arrestor,deforming the bullet casing and melting my sealing face i attached to it. FUKKKKKKEN IDIOT :x if only i had removed the piston :(

so this resulted in me making the one posted in revenge for my failure,but i suppose its not completly screwed i just need to get another shrader and piston for it ,but maybe another day :D
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Attachments
mini failure.jpg
mini coax
al-xg wrote:
I've used various things like cutting oil, silicone lubricant, even butter

jsr wrote:
This collection of containers on your bedside table must look very intimidating to any visiting young ladies

...but hey, lube shows you care;)
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Unread postAuthor: jackssmirkingrevenge » Tue Sep 08, 2009 4:41 am

FORE!!!! wrote:Well considering jsr had the balls to admit to a failure i guess ill share my own failure, basically stupidity rather than pushing the limits of the device.


This hobby is about research and development, assessing failure is probably more important than celebrating success, so it's always good to share :)

In your case, glad you didn't get hurt :)
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Unread postAuthor: Mitchza89 » Tue Sep 08, 2009 5:53 am

We've all had embarrassing incidents after a few too many. Like me pissed off my nutter trying to shoot a beer can, missing the can and having the bearing ricocheting into my foot. Another beer killed the pain though :D
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Unread postAuthor: clemsonguy1125 » Fri Oct 02, 2009 6:18 pm

One of my mini pill bottle cannons blew up and the cap shot back and hit me in the chest, thank goodness it wasnt pointing an my face.
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