FEAR
-
Solar
- Corporal
- Posts: 545
- Joined: Tue May 17, 2005 11:53 pm
- Has thanked: 1 time
- Been thanked: 17 times
Whoa! bad idea anyways. Compressed air, even at shop pressures can kill you by being injected(injested?) through the skin which is very porous like a sponge. I will look for some info to back that up.Killjoy wrote:haha I have always wondered what golfballs at 1900 fps would do to flesh...
But yes I see no way this wouldn't kill you if you stood in front of the barrel unless it was a blank shot.
-
Novacastrian
- Staff Sergeant 2
- Posts: 1603
- Joined: Sat Aug 11, 2007 6:59 pm
- Been thanked: 1 time
Solar wrote:Killjoy wrote:haha I have always wondered what golfballs at 1900 fps would do to flesh...
But yes I see no way this wouldn't kill you if you stood in front of the barrel unless it was a blank shot.
Whoa! bad idea anyways. Compressed air, even at shop pressures can kill you by being injected(injested?) through the skin which is very porous like a sponge. I will look for some info to back that up.
I think you are right to a certain degree, however my understanding is that one must have a cut fairly close to an artery to enable death by air injection, by blowgun or otherwise. Your heart can only be stopped by a substantially large "plug" of air.
If this were to happen otherwise it would have to involve air pressures above normal "shop" pressures. (Like 1400psi).
America, the greatest gangster of all time. With 200 million odd foot soldiers at it's whim and call.
When you fill your car with refined oil remember that it has been paid for with blood and guts, some from your own countrymen, most not.
When you fill your car with refined oil remember that it has been paid for with blood and guts, some from your own countrymen, most not.
-
jackssmirkingrevenge
- Five Star General
- Posts: 26203
- Joined: Thu Mar 15, 2007 11:28 pm
- Has thanked: 569 times
- Been thanked: 345 times
in any case, a facefull of hot supersonic gas isn't going to be too healthy. The following refers to firearms but is just as relevant to hybrids:
Q. Is blank ammunition really dangerous?
A. Absolutely! First, let's reiterate the second rule of firearm safety. Never point a firearm at anything you are not willing to destroy. Now say it again: Never point a firearm at anything you are not willing to destroy. Blank ammunition, while it contains no bullet in the usual sense does project bits of wadding material (some of which are fairly thick) and powder, as well as a blast of high pressure and very hot gases which can penetrate skin at a fairly great distance. Common smokeless powders have an energy potential of around 180 ft lb per grain weight of powder.
Using GI .30-06 blanks I was able to punch holes in a cardboard target at 7 feet quite regularly and at near contact distances I could easily break a 1" board with the muzzle blast. Using .38SPL blanks I could shatter a watermelon at 2 feet and pepper its skin at 5 feet. Note that some military ammunition sold as blank ammunition and which is totally made of plastic with a metallic base is actually short range practice ammunition that fires a hollow plastic "bullet" at very high velocity. Nuff said! Remember, Never point a firearm at anything you are not willing to destroy.
Also, keep in mind that the muzzle blast from a blank (just as with live ammunition) can damage your hearing.
hectmarr wrote:You have to make many weapons, because this field is long and short life
maybe I should have added "perhaps" before the blank shot part. Sure there's a chance it would kill you, but even if you lived you would be pretty messed up from the hot gases, so bad idea all around.
And solar I wasn't saying that would be a good idea, standing in front of this thing when you fire would be incredibly stupid, actually standing directly or relatively close and in front of the muzzle of almost any hybrid, pneumatic, or combustion would be a bad idea, ammo or not.
And solar I wasn't saying that would be a good idea, standing in front of this thing when you fire would be incredibly stupid, actually standing directly or relatively close and in front of the muzzle of almost any hybrid, pneumatic, or combustion would be a bad idea, ammo or not.
Stanford Class of 2012
"In the end our society will be defined not only by what we create, but what we refuse to destroy"- John Sawhill
"In the end our society will be defined not only by what we create, but what we refuse to destroy"- John Sawhill
that would be pretty cool. i shot at a two by six with a 3x mix and that blew it back with a good amount of force.
And no I haven't gotten around to rebuilding the spark strip, been snowy and old here so to much of a pain to drag it out and test it. Maybe when it gets a little warmer.
And no I haven't gotten around to rebuilding the spark strip, been snowy and old here so to much of a pain to drag it out and test it. Maybe when it gets a little warmer.
Stanford Class of 2012
"In the end our society will be defined not only by what we create, but what we refuse to destroy"- John Sawhill
"In the end our society will be defined not only by what we create, but what we refuse to destroy"- John Sawhill
Yeah, just a check valve gauge deal. But when I was moving it over the summer the gauge got crushed so for now I just have the hole plugged where the guage was.
Stanford Class of 2012
"In the end our society will be defined not only by what we create, but what we refuse to destroy"- John Sawhill
"In the end our society will be defined not only by what we create, but what we refuse to destroy"- John Sawhill
-
sniper hero
- Specialist 3
- Posts: 332
- Joined: Fri Mar 07, 2008 3:12 pm
monster is the only word to describe this cannon
that's a good piece of work
and the damage is just unbelievable
the vids are awesome
I love this cannon
that's a good piece of work
and the damage is just unbelievable
the vids are awesome
I love this cannon
proud member of dutch spud clan
coming: semi auto pellet sniper:D
coming: semi auto pellet sniper:D
-
willarddaniels
- Specialist 2
- Posts: 286
- Joined: Wed Jan 31, 2007 2:34 pm
- Location: Idaho
bump
I don't usually kick up old threads- but this is beautiful! One question, KJ: did your improvised peak gauge work well?
One word to describe this cannon: Inspiring.
I don't usually kick up old threads- but this is beautiful! One question, KJ: did your improvised peak gauge work well?
One word to describe this cannon: Inspiring.
If you're 20 and not a liberal, you don't have a heart. If you're 30 and not a Conservative, you don't have a brain.
Thanks willard, glad to make something to inspire.
The improvised peak gauge worked very well, the only problem was my burst disks failed to early so it gave a low reading but I fixed that and now the readings tend to be close to the estimated pressures.
The improvised peak gauge worked very well, the only problem was my burst disks failed to early so it gave a low reading but I fixed that and now the readings tend to be close to the estimated pressures.
Stanford Class of 2012
"In the end our society will be defined not only by what we create, but what we refuse to destroy"- John Sawhill
"In the end our society will be defined not only by what we create, but what we refuse to destroy"- John Sawhill
Wow I just realized I never replied to your post, my bad.
I have a sheet with all this written down, but the current state of my room forbids my location of it, so I'll try and give you the ones I remember.
I tried several 4X mixes with poor burst disks that were giving at around 270 psi (gauge reading). I switched to 1/4" particle board and 4x mixes were resulting in gauge readings between 350 and 370 psi roughly.
I also tried a couple 3x mixes and was getting readings around 275 psi.
I wanted to test higher mixes but when I was moving the cannon I dropped it by accident and the gauge got crushed and I haven't replaced it yet. I have gone up to 6x mixes but their was no gauge.
Now these readings are no means accurate, but they're at least in the same ball park as the estimated pressures gaseq coughed up for me and also these show more at what pressure my burst disks were giving then the combustion pressures, but oh well.
And to update ya'll on the status of the cannon, heres a list of new developments:
> I received my new 2" 3000psi forged steel union yesterday
> I also got a 300psi digital gauge with a pressure resolution of 0.1psi and =-1% accuracy (I am pursuing making a universal fueling/ignition box based on the design of DYI's fueling meter).
>The 2" barrel has been scraped and will be replaced with a 4" bore, 50 foot long barrel. I also received all the stuff for reinforcing the barrel yesterday as well (fiberglass, epoxy, steel wire, and dense expanding foam).
>A new fully portable platform as been designed and everything acquired to build it. Will be constructed out of steel.
So things are finally coming together.
I have a sheet with all this written down, but the current state of my room forbids my location of it, so I'll try and give you the ones I remember.
I tried several 4X mixes with poor burst disks that were giving at around 270 psi (gauge reading). I switched to 1/4" particle board and 4x mixes were resulting in gauge readings between 350 and 370 psi roughly.
I also tried a couple 3x mixes and was getting readings around 275 psi.
I wanted to test higher mixes but when I was moving the cannon I dropped it by accident and the gauge got crushed and I haven't replaced it yet. I have gone up to 6x mixes but their was no gauge.
Now these readings are no means accurate, but they're at least in the same ball park as the estimated pressures gaseq coughed up for me and also these show more at what pressure my burst disks were giving then the combustion pressures, but oh well.
And to update ya'll on the status of the cannon, heres a list of new developments:
> I received my new 2" 3000psi forged steel union yesterday
> I also got a 300psi digital gauge with a pressure resolution of 0.1psi and =-1% accuracy (I am pursuing making a universal fueling/ignition box based on the design of DYI's fueling meter).
>The 2" barrel has been scraped and will be replaced with a 4" bore, 50 foot long barrel. I also received all the stuff for reinforcing the barrel yesterday as well (fiberglass, epoxy, steel wire, and dense expanding foam).
>A new fully portable platform as been designed and everything acquired to build it. Will be constructed out of steel.
So things are finally coming together.
Stanford Class of 2012
"In the end our society will be defined not only by what we create, but what we refuse to destroy"- John Sawhill
"In the end our society will be defined not only by what we create, but what we refuse to destroy"- John Sawhill