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Sunkin starts new nail gun
- Thread starter MarylandMark
- Start date
Buoy
Founding Member
Tornado researchers.
Guys who build cool things?
Imagine the crowd control implications. Screw the bean bag gun.
The only downside is that it needs to be mounted on a humvee.
I have one available, but it's only an H3.
If needed, we can mount it on my Avalanche.
Still would look pretty cool.
I built this thing last summer. It'll shoot a tennis ball through a 3/4" sheet of plywood at 30 feet.
I had a similar design back in college. A potato fired from about 20 feet down the hall took the RA's door right off the hinges.
JupiterSunsation
New member
potato guns can be felony charges for discharging a firearm if the cop wants to be a pr!ck They are dangerous due to the velocity and size of the potato/tennis ball.
I built one of those tennis ball cannons years ago.
Only thing is it used M80's for the propelant.
Tennis ball was only good for one shot because it blew all the fur off with the first shot.
Aimed straight up using an orange tennis ball it would go out of sight and not come back to earth for about 60 seconds.
M80's are hard to get these days.
Droped a ball on the nighbors house about 1/4 mile away.
Only thing is it used M80's for the propelant.
Tennis ball was only good for one shot because it blew all the fur off with the first shot.
Aimed straight up using an orange tennis ball it would go out of sight and not come back to earth for about 60 seconds.
M80's are hard to get these days.
Droped a ball on the nighbors house about 1/4 mile away.
Wrinkleface
Founding Member
pix!!!:26:
Bobcat
Founding Member
I have a similar story that I will tell tomorrow:sifone:
Why? Because a buddy sent me a vid of one that used hairspray. I wanted to see if I could build one. I did some internet research and came up with this. I made 6 of them for the local school to use at football games, etc. They shot confetti. Or sometimes T-shirts. I still have 3 of them hanging in my shop that we've never used- they're smaller. 2" bore (could use for potatoes) . The tennis ball version uses 2.5" tube for the barrel.
I take it to the occasional picnic and shoot them straight up. The kids love to try to catch them. They go up so far you lose site for a good long time.
I take it to the occasional picnic and shoot them straight up. The kids love to try to catch them. They go up so far you lose site for a good long time.
If you guys want to build these, I can take detailed pics and give you whatever tips. It's all sch. 40 PVC and Rain Bird sprinkler valves- with some mods.
Buoy
Founding Member
We all know that Chris knows everything...
But, he seems to have a passion about his spud guns.
Scarab KV
New member
Hmmmm....the neighbor's dog comes to mind:sifone:
Tony
Founding Member
I only did the torch mix once, the reccoil ripped the gun straight backwards out of my hands so hard that the igniter damn near tore my finger off. After that we added real handles and mounted it to a 4 wheeler, ported the barrel and started experimenting with propane. I think its still hanging somewhere in my buddy's barn.
fund razor
Founding Member
Once again, proving who is the coolest Dad ever.
I think this was how Maude Flanders died on the Simpsons. She was shot with a T Shirt cannon by the Duff Man and fell off the bleachers.
No idea.maybe a hundred bucks or so. The most expensive single part is the trigger. The air chambers must release very rapidly. If they release slowly, the ball has exited the barrel while the chambers are still dumping air volume and that costs you velocity. The sprinkler valves are diaphragm valves. They use the pressure differential of area to hold the flapper closed- the top area is larger than the bottom and both have equal pressure. So, by having larger area, the flapper stays shut over the discharge port. You have to dump the air out of the top quickly so the diaphragm opens quickly. To do that, I needed a very high flow air blow gun. I tried a $5 one and you could still hear the air leaving after the ball- and it made a funny "wounded moose" noise when the diaphragms vibrated open and shut. After increasing the outflow, that stopped and you now get a sharp bang when it fires.
As for the rest, I think the valves were $15 and the rest is just Sch. 40 PVC pieces. You have to go to a plumbing supply to get the 2.5" and to get the Sch. 40. If you use Home Depot DWV pipe and fittings, it will explode like a bomb and kill you.
A word of warning- PVC is not air-rated. It gets brittle when cold. It's perfectly safe but only down to about 40 degrees. Below that, a sharp rap when pressurized can cause it to explode.
MarylandMark
Charter Member
http://www.spudtech.com/movies/asf/tornado simulator.wmv
http://www.spudtech.com/store/
I'm sure it's cheaper to do it yourself
We use the hair spray ones around here- some thing as complicated as these would end up being too dangerous in my hands after drinks
http://www.spudtech.com/store/
I'm sure it's cheaper to do it yourself
We use the hair spray ones around here- some thing as complicated as these would end up being too dangerous in my hands after drinks
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