Page 7 of 21
Posted: Fri May 11, 2007 10:10 pm
by frankrede
jackssmirkingrevenge wrote:joannaardway wrote:Very innovative. This probably qualifies as one of the smallest spudguns in history.
Thanks
The smallest semi-amateur pneumatic I can think of is this device:
pop-shot micro gun - chambered in 0.177 using the Brocock micro air cartridge (now illegal in the UK thanks to your lovely government
) at about 900 psi.
I haven't seen a smaller co-axial though
I could easily have gone smaller lengthwise but I wanted some measure of power.
I thought it said 300 psi and was made by a company
Posted: Fri May 11, 2007 10:14 pm
by Hawkeye
It says 3000 and repeats it for emphasis...
Posted: Fri May 11, 2007 10:46 pm
by ammosmoke
Yeah, didn't you catch that?
Posted: Sat May 12, 2007 12:04 am
by jackssmirkingrevenge
Hawkeye wrote:It says 3000 and repeats it for emphasis...
It's bollocks as far as I can tell, usually the brocock micro cartridges aren't filled past 1000 psi, I know from other sources. I didn't see them checking it with a gauge either.
and was made by a company
In Pakistan? Not so, it was hand crafted by Steve Harper in the UK
After doing the math this little gun should blast a relatively standard weight pellet just over the speed of sound
if it had a barrel a bit over 2 inches in length.
Also bollocks, even with a rifle length barrel the full size tandem air cartridge could barely manage 12 ft/lbs, let alone break the sound barrier with its micro version and a tiny barrel.
Posted: Sat May 12, 2007 12:11 am
by ammosmoke
Yeah, I'm gonna run it through GGDT and see what I get. Prob something similar to what you have. Man, they really must have exaggerated!!
Posted: Sat May 12, 2007 12:15 am
by jackssmirkingrevenge
For reference' sake, this is what the cart looks like from the inside:
(image taken from
here)
It's fired by a firing pin striking the central stem and moving it forward.
Posted: Sat May 12, 2007 12:18 am
by jackssmirkingrevenge
Posted: Sat May 12, 2007 1:02 am
by ammosmoke
Well, IDK if its just me or what, but I can't get GGDT to run such small numbers successfully. It keep freaking out....
Posted: Sat May 12, 2007 1:40 am
by frankrede
Hawkeye wrote:It says 3000 and repeats it for emphasis...
I meant 3000
Posted: Sat May 12, 2007 2:12 am
by chaos
ammosmoke wrote:Well, IDK if its just me or what, but I can't get GGDT to run such small numbers successfully. It keep freaking out....
your projectile has a bigger diameter than the i-d of the barrel, and the reservoir data is wrong, somhow.
Posted: Sat May 12, 2007 5:37 am
by Hotwired
Yeah... a 0.0177 projectile won't shift anywhere in a 0.0166 barrel.
Also, don't you mean 0.177?
Posted: Sat May 12, 2007 6:31 am
by jackssmirkingrevenge
I'm being optimistic here, and only got half the speed of sound:
Posted: Sat May 12, 2007 8:17 am
by TwitchTheAussie
Jack could you possibly make me one? I got $5 and some lollies
But seriously how much do I have to pay to get one?
Posted: Sat May 12, 2007 8:30 am
by chaos
can i put my order in, ill pay with some stainless tubing or something
Posted: Sat May 12, 2007 8:44 am
by jackssmirkingrevenge
how much do I have to pay to get one?
Including postage to Oz, too much
sorry but I don't market complete launchers, besides, I'm already up to my ears in silencer orders at the moment.
However - honestly - I'm sure pretty much anyone could manage to build one. All you need is to rummage around your local model shop/hardware store for the right sizes of pipe, some decent 5 minute epoxy and a hacksaw.
You can use the money you saved to purchase a decent high-pressure shock pump