Show us your pneumatic spud gun! Discuss pneumatic (compressed gas) powered potato guns and related accessories. Valve types, actuation, pipe, materials, fittings, compressors, safety, gas choices, and more.
Hey crna just wanted to say thanks for this thread, I never knew these knives even existed and making them pneumatic is even cooler, yours inspired me to give it a go and Im pretty pleased with the results, for now it's only spring powered but I made an addition to the knife that adds an o-ring and I will be soldering a shrader into the handle.
It's all brass, copper, and steel the blade is made from an old chisel, range with the spring is about 25 ft which I think is fairly good, hopefully can be improved with some higher pressure from the pneumatic.
Patience is a virtue, get it if you can, seldom in a women, never in a man.
Hey very nice work there jor2daje :thumbright:, looks great! When your get around to making it pneumatic keep the spring in to see if it helps, i was going to do that but cant find a stiff spring the fits. Thats why i when down the pneumatic route.
i also have an update, more damage pics/vid. its only at 100psi again, because i cant find something good to shot at.
edit [youtube][/youtube]
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dmg3.jpg (17.64 KiB) Viewed 3089 times
went right through, like its polystyrene or something.
the target is 5 and a bit centimeters of polystyrene
dmg.jpg (32.11 KiB) Viewed 3089 times
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crna legija, that is a really nice looking knife. The main problem with the QD is the really short "barrel" length, like an inch, and that is a beautiful solution. I am trying to think up an easier way to make one, but that seems pretty simple.
And jor2daje, nice job there. I like it. Should be pretty powerful with both spring and pneumatic.
Last edited by shardbearer on Thu May 12, 2011 10:32 pm, edited 1 time in total.
The spring in these knives is powerful enough to propel the blade to about 6 meters (about 18 feet) or more at 63 km/h (39 mph). They were not without drawbacks however: Because the projectile blade had no aerodynamic or gyroscopic stabilization, it was only accurate out to approximately 3 meters. Any further and the blade would often tumble and land sideways or tail-first.
The only ways to stabilize objects are through spin, fins, or having the weight in the front, none of which are viable for knives.
shardbearer wrote:The only ways to stabilize objects are through spin, fins, or having the weight in the front, none of which are viable for knives.
Not necessarily. The "handle" can be made out of aluminium, which would put the CG forward with a heavy steel blade. You can even have a telescopic tube than extends on firing.
It would also make sense to have a high aspect ratio dagger-like blade fitted to a relatively wide "handle" in order to keep the CP to the rear, as well as improving penetration.
hectmarr wrote:You have to make many weapons, because this field is long and short life
To improve range you could have the barrel cover the blade, but that would defeat the ability to use it as a normal knife while in the barrel. O rings on the handle would also help range.
I wouldn't be surprised if they had a knife, no shovel projectile for that thing as the piston is separate, it really is a question of "whatever fits in the barrel".
hectmarr wrote:You have to make many weapons, because this field is long and short life
saefroch wrote:Was that link intentional, JSR? The site it led me to redirected my browser to an X-rated website and tried to load a virus onto my computer...
Certainly not my intention. It's a perfectly innocent youtube link!
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hectmarr wrote:You have to make many weapons, because this field is long and short life