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| jon_89 |
 Posted: 06/18/2008 11:58 AM Post subject: 300 yards? |
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Lieutenant Colonel
Joined: 11 Apr 2007
Posts: 429
568.78 Spud Bux
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I am looking to achieve a distance of about 300 yards. I cant make my mind up of which one to build.
1.combustion: 3x18 inch chamber, 1.5x60 inch barrel, metered propane, fan, and stungun.
2.pnuematic: 1.5x48 inch chamber, 1 inch modified sprinkler valve, 1.25x60 barrel.
These numbers just seem to be what people use who claim they achieved 300 yards. |
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| LynyrdSkynyrd |
| Posted: 06/18/2008 12:03 PM Post subject: |
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Sergeant
Joined: 26 Aug 2006
Posts: 93
198.92 Spud Bux
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well, combustion would make a nice bang, but probably would be more expensive than a simple pneumatic.
idk, i'm kinda partial to pneumatics. I've always liked them better. |
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| jon_89 |
| Posted: 06/18/2008 12:05 PM Post subject: |
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Lieutenant Colonel
Joined: 11 Apr 2007
Posts: 429
568.78 Spud Bux
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| I am leading towards the pnuematic just because I know it will work, but I like the combustion because of its portability. So do you think 300 yards is possible? |
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| LynyrdSkynyrd |
| Posted: 06/18/2008 12:10 PM Post subject: |
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Sergeant
Joined: 26 Aug 2006
Posts: 93
198.92 Spud Bux
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o yea. if the chamber:barrel ratio is right.
If you really want to get max distance you might want to make your own piston to get max flow. |
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| starman |
| Posted: 06/18/2008 12:19 PM Post subject: |
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Big Daddio
Joined: 12 Dec 2007
Posts: 1363
2525.85 Spud Bux
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300 yards is further than most people think....
Depends on your ammo...going to be tough getting a potato slug out that far with anything... Golf ball or other hard ammo very doable. Hitting a potato with enough force to get it out 300 yards tends to vaporize it.
Chamber up to 4" on your combustion and put 3 centered spark gaps in there and you'll get golfballs out way further than that.
Of course, I'm a combustion guy....  |
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| LynyrdSkynyrd |
| Posted: 06/18/2008 12:25 PM Post subject: |
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Sergeant
Joined: 26 Aug 2006
Posts: 93
198.92 Spud Bux
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yea thats true.
could get into a huge debate on which is better, pneumatics or combustion.
if you're shooting a golf ball either one would be simple to get over 300 yards.
with a cannon that small. it really doesn't matter. Its once you get to a much larger scale the pneumatics starts overcoming combustions (unless of course you start using gunpowder.)  |
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| pat123 |
| Posted: 06/18/2008 12:54 PM Post subject: |
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Lieutenant Colonel
Joined: 23 Dec 2006
Posts: 474
101.26 Spud Bux
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according to hgdt a 1 once projectile will be just short of making it. 854 feet or 284 yards.
this is based on the combustion that you explained. |
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| starman |
| Posted: 06/18/2008 12:58 PM Post subject: |
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Big Daddio
Joined: 12 Dec 2007
Posts: 1363
2525.85 Spud Bux
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| LynyrdSkynyrd wrote: | yea thats true.
could get into a huge debate on which is better, pneumatics or combustion.
if you're shooting a golf ball either one would be simple to get over 300 yards.
with a cannon that small. it really doesn't matter. Its once you get to a much larger scale the pneumatics starts overcoming combustions (unless of course you start using gunpowder.) |
....Or hybridization and burst disks...  |
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| Spuddin |
| Posted: 06/18/2008 13:43 PM Post subject: |
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Donating Member
Joined: 16 May 2007
Posts: 260
664.94 Spud Bux
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| ive seen a couple 300 yard shots on here, one was pitbull and his softball combustion (300 yds or real close). and i think the other one was sthorne. im sure there are lots more. |
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| jimmy101 |
| Posted: 06/18/2008 13:53 PM Post subject: |
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Major General
Joined: 28 Mar 2007
Posts: 1594
6760.52 Spud Bux
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Most claims of 300 yard ranges are bogus. It is possible with a golfball but probably not possible with most other common ammos (tennis balls, spuds etc.).
Can you even see a 1.5" shell at 300 yards? I have trouble seeing a 2" spud at 100 yards, at 300 yards the shell appears 9x smaller than at 100 yards. |
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| MrCrowley |
| Posted: 06/18/2008 14:11 PM Post subject: |
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Blizzard of Ozz
Joined: 23 Jun 2006
Posts: 5947
2649.74 Spud Bux
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| My SGV, which is a 1' 4" chamber with 1" sprinkler valve and a golfball barrel would probably only shoot about 250yards-270yards. You might need a bit more then that. |
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| jackssmirkingrevenge |
| Posted: 06/18/2008 14:14 PM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 6518
9935.58 Spud Bux
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What pressure were you planning on using for a pneumatic? And a 2" sprinkler valve would be a better idea
More importantly, what were you planning as a projectile? |
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| LGM |
| Posted: 06/18/2008 14:29 PM Post subject: |
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Captain
Joined: 22 Jan 2007
Posts: 318
195.39 Spud Bux
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Well, you could freeze the potato to harden it and then turn it on a lathe to 1.5", then you get some oxygen…
If you put a piston valve on a pneumatic of those dimensions you should be throwing stuff pretty far out there. Spray your projectile with glow in the dark paint and fire a little after sunset (or shoot a flashlight) to find it. |
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| )DEMON( |
| Posted: 06/18/2008 14:30 PM Post subject: |
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Air head
Joined: 12 Mar 2006
Posts: 1392
5185.24 Spud Bux
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The only thing I would really want to launch 300 yards is my sister.
Don't forget that you could use a burst disk on a pneumatic as well. |
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| jackssmirkingrevenge |
| Posted: 06/18/2008 14:46 PM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 6518
9935.58 Spud Bux
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| )DEMON( wrote: | | The only thing I would really want to launch 300 yards is my sister. |
hahahaha excellent!
Is she not of the age where it's convenient to know her friends? |
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