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| TwitchTheAussie |
 Posted: 08/16/2008 1:25 AM Post subject: |
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Brigadier General
Joined: 06 Feb 2007
Posts: 935
1016.00 Spud Bux
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| Designing a new combustion. 8" x 50" chamber. Deciding on the barrel size. |
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| SpudFarm |
| Posted: 08/16/2008 4:32 AM Post subject: |
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Hybrid Guy
Joined: 04 Nov 2006
Posts: 2097
1187.34 Spud Bux
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UPGBH10x was fired numerous times at 7x yesterday and the comming pictures is the LAST you ever get from this until i post it.
well i can't upload the pics.. i get the
"Upload Error: Could not upload Attachment to ./files/img_2008_147.jpg.
Upload Error: Could not upload Attachment to ./files/img_2008_147.jpg."
messenge :S
help me cause i think you want to see it  |
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| MaxuS the 2nd |
| Posted: 08/16/2008 4:56 AM Post subject: |
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Colonel
Joined: 19 Jan 2008
Posts: 653
827.94 Spud Bux
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| Are you using photobucket Spudfarm? |
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| SpudFarm |
| Posted: 08/16/2008 10:40 AM Post subject: |
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Hybrid Guy
Joined: 04 Nov 2006
Posts: 2097
1187.34 Spud Bux
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you reminded me Max 
it is 8" of solid wood, about half the thicknes is gone since it tore the back off, the grooves in the ground if REALLY deep and are from one buckshot and the other is the slug that went through the wood. |
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| potatoflinger |
| Posted: 08/16/2008 14:36 PM Post subject: |
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Seasoned Spudder
Joined: 02 Nov 2006
Posts: 1002
373.55 Spud Bux
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| ITWOST I started working on a paintball launcher that looks like a Barrett .50 cal. |
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| MaxuS the 2nd |
| Posted: 08/16/2008 14:47 PM Post subject: |
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Colonel
Joined: 19 Jan 2008
Posts: 653
827.94 Spud Bux
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| potatoflinger wrote: | | ITWOST I started working on a paintball launcher that looks like a Barrett .50 cal. |
Two questions..
1) High Pressure?
2) How long till completion?
3) Do you have a camera?  |
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| DYI |
| Posted: 08/16/2008 14:55 PM Post subject: |
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Rear Brigadier
Joined: 07 Jul 2007
Posts: 2308
1164.60 Spud Bux
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ITWOST, I realised exactly what 60kJ of recoil force will do to a poorly constructed stand, and that the sparkplugs I'm using weren't designed to survive 3000psi...
I also learned that 10 year old bags of concrete mix apparently don't make very good concrete 
Last edited by DYI on 08/16/2008 15:07 PM; edited 2 times in total |
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| potatoflinger |
| Posted: 08/16/2008 15:00 PM Post subject: |
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Seasoned Spudder
Joined: 02 Nov 2006
Posts: 1002
373.55 Spud Bux
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| MaxuS the 2nd wrote: | | potatoflinger wrote: | | ITWOST I started working on a paintball launcher that looks like a Barrett .50 cal. |
Two questions..
1) High Pressure?
2) How long till completion?
3) Do you have a camera? |
That's three questions
It will have a steel chamber, so I may take it to 300 PSI.
I am saving my money for a truck, so it may take a while (a month probably)
Yes, I do have a camera. |
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| MaxuS the 2nd |
| Posted: 08/16/2008 15:05 PM Post subject: |
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Colonel
Joined: 19 Jan 2008
Posts: 653
827.94 Spud Bux
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| Ahh good, I just love anything that looks like a .50cal rifle. |
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| SpudBlaster15 |
| Posted: 08/17/2008 11:35 AM Post subject: |
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Human blast shield
Joined: 18 Oct 2006
Posts: 1557
55.58 Spud Bux
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| DYI wrote: | | 60kJ of recoil force |
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| SpudFarm |
| Posted: 08/17/2008 12:35 PM Post subject: |
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Hybrid Guy
Joined: 04 Nov 2006
Posts: 2097
1187.34 Spud Bux
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| SpudBlaster15 wrote: | | DYI wrote: | | 60kJ of recoil force |
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W00T? |
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| DYI |
| Posted: 08/17/2008 14:32 PM Post subject: |
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Rear Brigadier
Joined: 07 Jul 2007
Posts: 2308
1164.60 Spud Bux
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| Spudblaster15 wrote: | | |
Okay, slight problem there. Recoil force of ~600J
Happy now?  |
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| Ragnarok |
| Posted: 08/17/2008 17:02 PM Post subject: |
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Lord of Karma
Joined: 19 Dec 2006
Posts: 2623
7152.99 Spud Bux
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| DYI wrote: | | Happy now? |
Joules are still energy, not force! 
Mind you people talking about the power of a rifle/whatever in Joules is also inaccurate.
Oh well, can't have everything. |
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| MaxuS the 2nd |
| Posted: 08/17/2008 17:10 PM Post subject: |
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Colonel
Joined: 19 Jan 2008
Posts: 653
827.94 Spud Bux
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Anyone know where I can get a 250mm piece of 90mm Delrin rod?
Uk only really.
Edit: Never mind, seems it's also known as Acetal. |
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| DYI |
| Posted: 08/17/2008 17:43 PM Post subject: |
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Rear Brigadier
Joined: 07 Jul 2007
Posts: 2308
1164.60 Spud Bux
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| Quote: | Joules are still energy, not force! Razz
Mind you people talking about the power of a rifle/whatever in Joules is also inaccurate.
Oh well, can't have everything. |
Once again, I'll rephrase it to appease the resident pedant(s):
The entire 100kg assembly recoiled at a speed of roughly 3.5m/s on firing, giving it a kinetic energy of ~600J, about 1/100th of what was imparted on the projectiles.
Also, how is using Joules when talking about the kinetic energy of the projectile fired from a rifle inaccurate? What unit of energy would you use? |
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