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| LikimysCrotchus5 |
 Posted: 02/16/2008 23:10 PM Post subject: |
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Brigadier General
Joined: 04 Sep 2007
Posts: 1064
2535.08 Spud Bux
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Its kind of interesting that tool you made but what also is interesting is how your avatar resembles you somewhat, according to the pic you posted.  |
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| goathunter |
| Posted: 02/17/2008 15:37 PM Post subject: |
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The avatarless one
Joined: 15 Feb 2007
Posts: 685
498.32 Spud Bux
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| DYI wrote: | I built a great stress relief tool a few weeks ago, out of random offcuts in my shop. Don't have much stress right now (actually quite the opposite), but it's nice to have around and, as you can imagine, packs a bit more punch than the old nunchaku.
The heavy bit on the end is 8 pounds of 2.5" hardened steel round bar. |
The question is are you big enough to stop it once you get to swinging? That makeshift hammer looks as big as you! |
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| DYI |
| Posted: 02/17/2008 16:22 PM Post subject: |
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Rear Brigadier
Joined: 07 Jul 2007
Posts: 2308
1164.60 Spud Bux
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| Quote: | The question is are you big enough to stop it once you get to swinging? That makeshift hammer looks as big as you!
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No problem there. There's not much of me, but I'm built pretty solid.
And congrats to Liki for seeing that. As you can probably guess, I don't usually look like that, but what's the point in holding a weaponized homemade hammer if you don't look the part? |
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| MaxuS the 2nd |
| Posted: 02/17/2008 17:42 PM Post subject: |
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Colonel
Joined: 19 Jan 2008
Posts: 653
827.94 Spud Bux
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| Almost finished my Flyback Transformer circuit. My 110mm and 75mm barrels also arrived in the post. I can't buy any fittings yet though...because I'm skint.lol |
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| mega_swordman |
| Posted: 02/17/2008 17:54 PM Post subject: |
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Lieutenant Colonel
Joined: 29 Nov 2006
Posts: 499
876.16 Spud Bux
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| I started to glue together my Bergles bazooka today. Also, I can't find my camera so I won't be able to showcase my cannons for a bit. |
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| Novacastrian |
| Posted: 02/17/2008 17:54 PM Post subject: |
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Bloody Aussie
Joined: 11 Aug 2007
Posts: 1622
116.11 Spud Bux
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Well i started on a "Hammer Piston" today, it will be very silmilar to this one - it is an idea i got from JSR.
Any ideas of performance increases? |
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| DYI |
| Posted: 02/17/2008 22:41 PM Post subject: |
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Rear Brigadier
Joined: 07 Jul 2007
Posts: 2308
1164.60 Spud Bux
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Today I've worked on the new 2" porting valve for the SCTBDC, as well as a prototype for my new canister round, which is showing a lot of promise. The valve doesn't really seal, but the leak rate should be easily overcome by the flow through the fill hose. I can't actually test either of the canister rounds right now, as they're 2" and 4" bore, and nothing that I have operational at the moment can fire them fast enough to do any real damage (and I don't even have a 4" barrel yet; $96 just for the pipe  )
There won't be any progress made on the [redacted] project until next weekend, because of an upcoming ski trip. |
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| MrCrowley |
| Posted: 02/17/2008 22:45 PM Post subject: |
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Blizzard of Ozz
Joined: 23 Jun 2006
Posts: 6180
3304.34 Spud Bux
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Today my parts from sgort87 arrived and now they sit in my garage until July when I actually get to build the thing at school.
In other news, i'm messing about with a small co-axial but can't find a .177" barrel and my Hybrid sits in the garage until I can find a few fittings, a barrel, ignition etc. |
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| SpudBlaster15 |
| Posted: 02/17/2008 22:54 PM Post subject: |
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Human blast shield
Joined: 18 Oct 2006
Posts: 1557
55.58 Spud Bux
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| Today I came up with a way to fire a 1kg projectile at 700FPS using a launcher that could be constructed for less than $100, and would have an overall length of less than 20', and operate with initial chamber pressures of less than 100PSIG. I may build it to reclaim the 'most powerful homemade air cannon in canada' title, but I really don't have any targets to fire it at. |
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| jackssmirkingrevenge |
| Posted: 02/17/2008 22:55 PM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 7050
11306.91 Spud Bux
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| Novacastrian wrote: | | Well i started on a "Hammer Piston" today |
You mean this one?
If so, sweet, I'd love to see it in action
edit: Improved the design diagram:
and there's the firing sequence here if you scroll down  |
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| Novacastrian |
| Posted: 02/18/2008 0:37 AM Post subject: |
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Bloody Aussie
Joined: 11 Aug 2007
Posts: 1622
116.11 Spud Bux
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Yes i do , JSR 
Jokes aside i really liked the concept of a hammer piston, or knock open valve. What do you want to name it?
It will be made as a mod for the Double Shot. I have already made the front half (barrel sealer) but am yet to make the "hammer", the ass end.
I plan to make this from Brass to provide a thump to the piston, i am however willing to suggestions in relation to the weight of said "ass end".
There has to be a "happy medium" as such, another note the hammer diameter will be roughly the same as the bore, just enough clearance for smooth flow, i might put an outer ptfe sleeve on to just to make sure...
Edit: My design is simplified somewhat, i lose the hammer guide,the chamber acts as such. FAK YOU ARE FAST, YOUR RE-DESIGN IS MY DESIGN-nearly. |
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| jackssmirkingrevenge |
| Posted: 02/18/2008 0:42 AM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 7050
11306.91 Spud Bux
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I liked "Hammer Piston" 
I think brass would be too heavy, the piston wouldn't have to weight more than usual because you still want substantial acceleration - the point is that the "hammer" would open the valve even without prior acceleration due to the area difference, all we're adding is the extra "oomph" to open the valve faster. |
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| Novacastrian |
| Posted: 02/18/2008 0:56 AM Post subject: |
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Bloody Aussie
Joined: 11 Aug 2007
Posts: 1622
116.11 Spud Bux
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Mmm, i get what you mean, the faster the hammer is moving the better ie more velocity- as such i will try to make it weigh the same as the sealer, for every action there is...
Thanks for the help, it will be hard to tell the difference without a chrony but i will try and determine it from damage.
God i need a chrony.
Ok i may make the hammer like 75% of the weight. |
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| jackssmirkingrevenge |
| Posted: 02/18/2008 1:42 AM Post subject: |
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space monkey
Joined: 15 Mar 2007
Posts: 7050
11306.91 Spud Bux
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| Novacastrian |
| Posted: 02/18/2008 2:10 AM Post subject: |
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Bloody Aussie
Joined: 11 Aug 2007
Posts: 1622
116.11 Spud Bux
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Do you think customs would raise a brow? I am unlicensed in all but spinning s#!t. Get the pun there? |
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