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Posted: Wed Dec 14, 2011 12:27 pm
by warhead052
I know the gas part. Believe me, I wanted to make one of these as soon as my dad told me he could get me in contact with a helium supplier. I wasn't talking about the gas part anyways, I was talking about what drove the piston.

Posted: Wed Dec 14, 2011 12:33 pm
by mark.f
What drives the piston in a LGG is not any type of high explosive. There is no piston in a CLGG.

Clear things up? :)

Posted: Wed Dec 14, 2011 12:47 pm
by warhead052
Some what. But this discussion has given me an idea.

Posted: Wed Dec 14, 2011 3:07 pm
by SpudBlaster15
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Posted: Wed Dec 14, 2011 5:20 pm
by evanmcorleytv
Gun Freak wrote:Evan... A hybrid could shoot 6 miles, given it is huge and firing an aerodynamic dart. I'm pretty sure a fire arm can shoot that far, so a properly made hybrid and projectile could too...
Actually, only artillery can shoot that far.. The maximum effective range for firearms is 2300 meters, which is about 1 and 1/5 of a mile.
jsefcik wrote:a howitzer shoots rounds pretty far :D :D :D :D
25 miles to be exact..

Posted: Wed Dec 14, 2011 5:30 pm
by MrCrowley
The maximum effective range for firearms is 2300
My firearm knowledge is pretty poor but isn't there a difference between effective range and the maximum range of the projectile for sniper rifles? Effective range being the distance at which an expert marksman can reliably hit a human sized target? Not sure if a .50cal round will travel 6km though.
Actually, only artillery can shoot that far
I assume you're not including hybrid cannons (or large pneumatics) in that quote as it seems entirely possible with the right projectile.

Posted: Wed Dec 14, 2011 6:52 pm
by Moonbogg
I always love how new people go after the most powerful stuff first without ever experiencing even a decent combustion. I remember my first post on this site ever. I was pursuing advice for making an oxy/acetylene cannon, when people suggested an advanced combustion first. I was impressed for sure as I didn't expect it to be that powerful really.
Then I wanted a little more, so I settled on the idea of a 2x hybrid and I almost shat my pants at the difference just that 2x increase made. I suggest building something tried and true that won't get you killed. Keep a mirror handy so you can watch your jaw drop in real time at the unexpected performance and power of a common, properly made combustion or piston pneumatic.

Posted: Wed Dec 14, 2011 7:03 pm
by Lockednloaded
evanmcorleytv wrote:
Gun Freak wrote:Evan... A hybrid could shoot 6 miles, given it is huge and firing an aerodynamic dart. I'm pretty sure a fire arm can shoot that far, so a properly made hybrid and projectile could too...
Actually, only artillery can shoot that far.. The maximum effective range for firearms is 2300 meters, which is about 1 and 1/5 of a mile.
We're not talking about hitting a target at 6 miles (don't really know where that figure came from..) this is a lob shot at a relatively high angle. The effective range of a bullet, or the farthest range to which a projectile can be expected to retain sufficient energy to perform its intended function (to kill), is way less then its maximum range when shot at about a 45º angle.

Posted: Wed Dec 14, 2011 7:23 pm
by MrCrowley
Moonbogg wrote:Keep a mirror handy so you can watch your jaw drop in real time at the unexpected performance and power
Countless times I've captured myself on video looking like a twat with my mouth open because of that :D

Posted: Wed Dec 14, 2011 8:03 pm
by mobile chernobyl
That moonbogg guy has a pretty good point... To the same point - its sort of like starting out with a benchmark... Setting that benchmark too high will skew your perception of the next creation. At some point you hit a peak in affordable performance of these launchers and you want more more more still. Well your either going to have to pony up more money or set your caliber size smaller. Neither are easy to come to terms with at first lol. So start out with something humble or else your going to hit that "peak" very quickly...

Posted: Wed Dec 14, 2011 8:18 pm
by Hotwired
evanmcorleytv wrote:
Gun Freak wrote:Evan... A hybrid could shoot 6 miles, given it is huge and firing an aerodynamic dart. I'm pretty sure a fire arm can shoot that far, so a properly made hybrid and projectile could too...
Actually, only artillery can shoot that far.. The maximum effective range for firearms is 2300 meters, which is about 1 and 1/5 of a mile.
jsefcik wrote:a howitzer shoots rounds pretty far :D :D :D :D
25 miles to be exact..
What are these numbers?

Effective range? Are we talking about distance or a direct shot on a target?

Because a Vickers machinegun has an "effective range" for shooting people it can see of 2000m.

It's maximum range is 4100m for indirect fire which you might understand is the type of shot you're thinking of when you say a howitzer fires 25 miles (which you're stating as an amusingly exact number).

Posted: Wed Dec 14, 2011 9:19 pm
by evanmcorleytv
Lockednloaded wrote:
evanmcorleytv wrote:
Gun Freak wrote:Evan... A hybrid could shoot 6 miles, given it is huge and firing an aerodynamic dart. I'm pretty sure a fire arm can shoot that far, so a properly made hybrid and projectile could too...
Actually, only artillery can shoot that far.. The maximum effective range for firearms is 2300 meters, which is about 1 and 1/5 of a mile.
We're not talking about hitting a target at 6 miles (don't really know where that figure came from..) this is a lob shot at a relatively high angle. The effective range of a bullet, or the farthest range to which a projectile can be expected to retain sufficient energy to perform its intended function (to kill), is way less then its maximum range when shot at about a 45º angle.
6 miles came from Warhead's comment.. And effective range means that it would only mildly wound the target. Second, these are the maximum distances according to the ammunition. In certain guns, the range would probably be less. I do not know what angle these measures were calculated at however, but I've never heard of ANY regular firearm having a FULL distance of over 2.5 miles.
25 miles (which you're stating as an amusingly exact number).
152mm and 155mm guns, depending on whether they are 39, 45, or 52 caliber pieces, get anywhere between 24-36km unassisted (reaching 30-50km with extended range ammo.)
Gun Freak wrote:Dude, it seems to me like you never justify yourself when you post. It's always you guessing things and saying sh¡t that's not based on experience. What are your sources?
Weapons encyclopedias, forums, documentaries, local military, other military personnel, gunsmiths, and weapons manuals. Happy now troll?

Posted: Wed Dec 14, 2011 9:22 pm
by Gun Freak
Dude, it seems to me like you never justify yourself when you post. It's always you guessing things and saying sh¡t that's not based on experience. What are your sources?

Posted: Wed Dec 14, 2011 9:53 pm
by velocity3x
evanmcorleytv wrote:
I've never heard of ANY regular firearm having a FULL distance of over 2.5 miles.


I'm sure there's much you haven't heard of at this point in your life.

50 BMG
Catridge Maximum Range - Average Muzzle Velocity
Ball, M2 7400m - 2930 fps
Armor Piercing, M2 7400m - 2930 fps

http://www.biggerhammer.net/barrett/faq.html

Posted: Wed Dec 14, 2011 9:56 pm
by evanmcorleytv
velocity3x wrote:evanmcorleytv wrote:
I've never heard of ANY regular firearm having a FULL distance of over 2.5 miles.


I'm sure there's much you haven't heard of at this point in your life.

50 BMG
Catridge Maximum Range - Average Muzzle Velocity
Ball, M2 7400m - 2930 fps
Armor Piercing, M2 7400m - 2930 fps

http://www.biggerhammer.net/barrett/faq.html
Cool! It's always good to learn new things, considering that this is the field that I plan to go into! Thanks!