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| FighterAce |
 Posted: 08/02/2010 13:38 PM Post subject: |
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1st Lieutenant
Joined: 23 Oct 2009
Posts: 262
500.72 Spud Bux
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| Gun Freak wrote: | | Ah, thanks man. Much appreciated, I would've spent 15 bucks more for nothing. |
I've spent 40 bucks for nothing  |
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| jackssmirkingrevenge |
| Posted: 08/02/2010 13:47 PM Post subject: |
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aspiring machinist
Joined: 15 Mar 2007
Posts: 18061
32519.23 Spud Bux
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| FighterAce wrote: | | I've spent 40 bucks for nothing |
You would have been better off buying a fridge pump  |
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| FighterAce |
| Posted: 08/02/2010 14:41 PM Post subject: |
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1st Lieutenant
Joined: 23 Oct 2009
Posts: 262
500.72 Spud Bux
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| Not... then I'd have to carry the fridge pump and a battery. Thats not ideal when you already have 15 kilos on your back. |
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| jackssmirkingrevenge |
| Posted: 08/02/2010 14:48 PM Post subject: |
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aspiring machinist
Joined: 15 Mar 2007
Posts: 18061
32519.23 Spud Bux
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| FighterAce |
| Posted: 08/02/2010 15:47 PM Post subject: |
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1st Lieutenant
Joined: 23 Oct 2009
Posts: 262
500.72 Spud Bux
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Overkill on the pressure - that thing can go to 200 bar, I only need 40-50. And if goes to such high pressure then you're gonna get very little volume. If you're going high pressure and higher volume you're better off making your own pump to suit your particular needs.
Btw. didnt we go off topic or something? I'm not even sure what this topic is all about... the title is not very self explanatory. |
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| Gun Freak |
| Posted: 08/02/2010 16:45 PM Post subject: |
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The Anti Hybrid
Joined: 25 Jan 2010
Posts: 4210
333.21 Spud Bux
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@Fighter Ace,
| Biopyro wrote: | In The World Of Spuds Today.
This thread is perfect for progress not significant enough for it's own thread. |
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| Zeus |
| Posted: 08/04/2010 4:11 AM Post subject: |
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Colonel
Joined: 27 Oct 2009
Posts: 749
1863.37 Spud Bux
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ITWOST, I found 80mm aluminium camlocks, for only $80AUD the set.
And the forum has ASCII haxoring available.
W00t Ñ→®O☻ |
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| MrCrowley |
| Posted: 08/06/2010 18:01 PM Post subject: |
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Kaleun
Joined: 23 Jun 2006
Posts: 8999
9195.37 Spud Bux
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ITWOST, just spent $40NZD ($30USD) on a meter of tennis ball barrel (65mm PN12 PVC).  |
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| spudtyrrant |
| Posted: 08/06/2010 18:38 PM Post subject: |
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Colonel
Joined: 02 Jan 2009
Posts: 582
959.61 Spud Bux
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| Zeus wrote: | ITWOST, I found 80mm aluminium camlocks, for only $80AUD the set.
And the forum has ASCII haxoring available.
W00t Ñ→®O☻ | ITWOST you got ripped off, i can get 75mm locks here for half that price |
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| Zeus |
| Posted: 08/07/2010 0:39 AM Post subject: |
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Colonel
Joined: 27 Oct 2009
Posts: 749
1863.37 Spud Bux
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| I don't intend to buy one, anyway this is Australia, everything costs more. |
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| al-xg |
| Posted: 08/15/2010 11:56 AM Post subject: |
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Colonel
Joined: 19 Jan 2007
Posts: 504
106.35 Spud Bux
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IWOST (er well, in fact, last week but I took the picture today  )
Lead pancakes!
14mm home cast lead bullets, fired from a rifled spring loaded ball valve pneumatic (~450psi), met a cast iron plate at relatively short range (10-20m)
Bullets were about 20mm long before impact. |
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| jackssmirkingrevenge |
| Posted: 08/15/2010 12:22 PM Post subject: |
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aspiring machinist
Joined: 15 Mar 2007
Posts: 18061
32519.23 Spud Bux
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| Nice! Any idea of how fast they were going? |
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| SpudFarm |
| Posted: 08/15/2010 13:03 PM Post subject: |
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Captain Slow
Joined: 04 Nov 2006
Posts: 2579
1492.77 Spud Bux
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I know that game!
Your pancakes look better though.. When I shot sand I only got a mushroom and when I shot sheetrock all the "paddles" flew off in all directions..
I have never managed to thoroughly pancake a lead slug out of my pneumatic though. I only have access to 150psi :/
Any videos? |
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| al-xg |
| Posted: 08/15/2010 14:30 PM Post subject: |
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Colonel
Joined: 19 Jan 2007
Posts: 504
106.35 Spud Bux
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Err I'm not too sure, I haven't really done any measurements on that spudgun.
It really depends on how fast my ball valve is opening, im guessing 30-40ms max as I've never seen it taking more than one frame to open on video.
I just tried estimating velocity with ggdt, and it seems to predict 130-140m/s, but I could be way off as I don't accurately know chamber volume projectile weight, valve Cv or opening times
That seems quite low, especially compared to previous airguns I built, but I was noticing rather long flight times.
Damage on target is quite impressive but that might just be down to heavy stable projectiles.
Spudfarm those are massive !  Recoil must be considerable.
Nothing too interesting on video, I hope to get one done before next WE, but then after that I'm back off to the UK and won't be near any airguns for a while. |
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| SpudFarm |
| Posted: 08/15/2010 14:45 PM Post subject: |
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Captain Slow
Joined: 04 Nov 2006
Posts: 2579
1492.77 Spud Bux
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130m/s on a slug like that is very impressive. It is quite hard to get lead up to speed in a spudgun.
Try to make a box'o'truth and shoot with those slugs. That is a quite good way to compare your guns performance to, well any gun really 
The slugs on the picture was fired from my hybrid (Currently mounted to a floor) so recoil is no problem. If you look at the hybrid thread: I am going to make new mounts for it, those I use now are horrible
Edit: if you want higher velocity you can bore out the back (Helps stability to) to reduce weight a bit. Doesn't look like you did that on those slugs. |
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