| Author |
Message
|
| spudd |
 Posted: 08/10/2007 5:05 AM Post subject: Bad power? |
 |
|
Private
Joined: 10 Aug 2007
Posts: 8
22.93 Spud Bux
|
I welded a spudgun about 30cm long with the barrel. i use a BBQ igniter wired with a sparkplug.
I sprayed som butane/propane refill and loaded with a little sharpened bolt with tape around it to make it air tight, then i shot at a apple and it only went about half way throug. earlyer i made a little blackpowder gun with the same barrel and i shot throu 3 apples no problemo.
Is it more power in blackpowder that gas? i really got a real bang with the powder, the neighburs wonderd whata hell was going on. |
|
| Back to top |
|
 |
|
|
|
| spanerman |
| Posted: 08/10/2007 5:10 AM Post subject: |
|
|
Lieutenant Colonel
Joined: 17 Sep 2006
Posts: 447
296.08 Spud Bux
|
| im guessing that the mix is bad....try propane metering..look it up in the wiki |
|
| Back to top |
|
|
| jackssmirkingrevenge |
| Posted: 08/10/2007 5:14 AM Post subject: |
|
|
space monkey
Joined: 15 Mar 2007
Posts: 6642
10237.07 Spud Bux
|
| Quote: | | Is it more power in blackpowder that gas? |
Definitely - the performance you described is normal for a combustion of that size. If you want real power with this sort of laucher, you're going to have to think bigger. |
|
| Back to top |
|
|
| spud yeti |
| Posted: 08/10/2007 5:37 AM Post subject: |
|
|
can i change this name
Joined: 08 May 2007
Posts: 1043
14.05 Spud Bux
|
| jackssmirkingrevenge wrote: | | Quote: | | Is it more power in blackpowder that gas? |
Definitely - the performance you described is normal for a combustion of that size. If you want real power with this sort of laucher, you're going to have to think bigger. |
As you go bigger the gap will close between the two because the gas increases drastically in power whereas the blackpowder is unfeesable to increase in size at a certain point and will plateau. |
|
| Back to top |
|
|
| Insomniac |
| Posted: 08/10/2007 6:02 AM Post subject: |
|
|
Colonel
Joined: 18 Dec 2006
Posts: 707
190.70 Spud Bux
|
Black powder would give you more power, but the great thing about spudguns is that there isn't much residue, they can have simple electric ignition without one-time-use ignitors, and the fuel is EVERYWHERE. Go into anyones house and it will contain spudgun propellent...errm, I mean aerosol cans.  |
|
| Back to top |
|
|
| spud yeti |
| Posted: 08/10/2007 6:14 AM Post subject: |
|
|
can i change this name
Joined: 08 May 2007
Posts: 1043
14.05 Spud Bux
|
Yay for axe deoderant  |
|
| Back to top |
|
|
| potatoflinger |
| Posted: 08/10/2007 9:15 AM Post subject: |
|
|
Seasoned Spudder
Joined: 02 Nov 2006
Posts: 982
334.35 Spud Bux
|
| spud yeti wrote: | | Yay for axe deoderant |
Why would you put that stuff in a cannon, it smells like fart spray  |
|
| Back to top |
|
|
| spud yeti |
| Posted: 08/10/2007 9:21 AM Post subject: |
|
|
can i change this name
Joined: 08 May 2007
Posts: 1043
14.05 Spud Bux
|
| potatoflinger wrote: | | spud yeti wrote: | | Yay for axe deoderant |
Why would you put that stuff in a cannon, it smells like fart spray |
Haha, too true, but everyone still seems to own it  |
|
| Back to top |
|
|
| spudd |
| Posted: 08/10/2007 10:34 AM Post subject: |
|
|
Private
Joined: 10 Aug 2007
Posts: 8
22.93 Spud Bux
|
| thanks for the answers! Then i have to build a bigger combustion chamber but with the same small barrel and i will get those 3 apples |
|
| Back to top |
|
|
| spud yeti |
| Posted: 08/10/2007 10:39 AM Post subject: |
|
|
can i change this name
Joined: 08 May 2007
Posts: 1043
14.05 Spud Bux
|
Why not build it with a bigger chamber and barrel, to maximize efficiency, because your barrel is just as important as the chamber  |
|
| Back to top |
|
|
| spudd |
| Posted: 08/10/2007 10:58 AM Post subject: |
|
|
Private
Joined: 10 Aug 2007
Posts: 8
22.93 Spud Bux
|
| yeah, but i want to shot small hard projectiles and no potatoes |
|
| Back to top |
|
|
| SpudBlaster15 |
| Posted: 08/10/2007 11:27 AM Post subject: |
|
|
Human blast shield
Joined: 18 Oct 2006
Posts: 1539
11.03 Spud Bux
|
| If your ratio is already fairly decent, increasing the chamber size and leaving the barrel alone will not increase performance. Increasing the chamber size AND extending the barrel will, however. |
|
| Back to top |
|
|
| spudd |
| Posted: 08/13/2007 15:41 PM Post subject: |
|
|
Private
Joined: 10 Aug 2007
Posts: 8
22.93 Spud Bux
|
| hmm that sucks.. So i cant make a more powerfull cannon that can shoot small projectiles. I better get som more of that black powder |
|
| Back to top |
|
|
| frankrede |
| Posted: 08/13/2007 16:17 PM Post subject: |
|
|
Sangheili
Joined: 20 Jul 2006
Posts: 2987
524.82 Spud Bux
|
| You can, did you just not here what he said? |
|
| Back to top |
|
|
| noob of noobs |
| Posted: 08/13/2007 16:55 PM Post subject: |
|
|
Captain
Joined: 12 Jun 2007
Posts: 305
565.07 Spud Bux
|
I'm no moderator, but isn't talking about black powder banned on the forum?  Plus, I'm not sure using it in PVC is a wise choice when it comes to fuel... Anyway, good luck. I also think to penetrate 3 apples you'll need a larger cannon with a larger barrel. |
|
| Back to top |
|
|
|
|
