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| Reactor4 |
 Posted: 10/07/2009 7:43 AM Post subject: |
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Specialist
Joined: 02 Oct 2009
Posts: 58
139.61 Spud Bux
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if only one could obtain enough epoxy to fill a dumpster haha 
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| jeepkahn |
| Posted: 10/07/2009 7:44 AM Post subject: |
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GRUMPY OLD FART
Joined: 09 Jan 2009
Posts: 754
772.95 Spud Bux
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700m/s??? I think you could safely test terminal range on a GB... If 700m/s doesn't get it past 1mile, nothing will...
Why do i all the sudden feel like me and the decimater are just a kid and a rubber band gun???
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| jackssmirkingrevenge |
| Posted: 10/07/2009 7:50 AM Post subject: |
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aspiring machinist
Joined: 15 Mar 2007
Posts: 18061
32519.23 Spud Bux
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| psycix wrote: | | Easy: take a pipe, take a dumpster. Hole in dumpster. Pipe in dumpster, through hole, fill dumpster with epoxy. Done. |
No need to be so drastic, I have access to stainless steel tube offcuts  so pretty thick endcaps should suffice. It's in the pipeline, though at the moment the focus is on my HPA auto devices.
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| Ragnarok |
| Posted: 10/07/2009 13:56 PM Post subject: |
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Lord of Karma
Joined: 19 Dec 2006
Posts: 5158
16113.53 Spud Bux
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| jeepkahn wrote: | | If 700m/s doesn't get it past 1mile, nothing will... |
And it won't. I can tell you that it'll probably hit a bit short of half a mile out.
Still a bloody long way though. You could have fun at the local driving range.
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| jeepkahn |
| Posted: 10/07/2009 14:12 PM Post subject: |
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GRUMPY OLD FART
Joined: 09 Jan 2009
Posts: 754
772.95 Spud Bux
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| Ragnarok wrote: | | jeepkahn wrote: | | If 700m/s doesn't get it past 1mile, nothing will... |
And it won't. I can tell you that it'll probably hit a bit short of half a mile out.
Still a bloody long way though. You could have fun at the local driving range. |
That was my point... that anybody says they shoot golfballs a mile with a sub 1000fps muzzle velocity is deluded... 1/2mile is possible, but only due to loft from backspin... I do know that when I've put fins on Gb's, they are more accurate but distance is cut almost in half...
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| jackssmirkingrevenge |
| Posted: 10/08/2009 1:41 AM Post subject: |
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aspiring machinist
Joined: 15 Mar 2007
Posts: 18061
32519.23 Spud Bux
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| Ragnarok |
| Posted: 10/08/2009 9:59 AM Post subject: |
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Lord of Karma
Joined: 19 Dec 2006
Posts: 5158
16113.53 Spud Bux
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Oh, so that's where it landed. I guess that means I should stop messing with the gravity cannon.
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| jackssmirkingrevenge |
| Posted: 10/08/2009 10:08 AM Post subject: |
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aspiring machinist
Joined: 15 Mar 2007
Posts: 18061
32519.23 Spud Bux
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So you're actually partly responsible for Scotland's relatively low life expectancy 
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| Ragnarok |
| Posted: 10/08/2009 10:33 AM Post subject: |
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Lord of Karma
Joined: 19 Dec 2006
Posts: 5158
16113.53 Spud Bux
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| I'm responsible for a whole lot more than that...
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| Captain Random |
| Posted: 01/19/2010 20:54 PM Post subject: |
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Private
Joined: 27 Dec 2009
Posts: 7
15.15 Spud Bux
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i have a question
if you fill a chamber with some gas, then pump in some air, then ignite the gas, trapping the gas with a ball valve, then flip the ball valve, would the ball valve hold the pressure or would it leak?
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| irisher |
| Posted: 01/19/2010 21:02 PM Post subject: |
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Lieutenant Colonel
Joined: 29 Dec 2008
Posts: 435
385.17 Spud Bux
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| The pressure is only momentarily generated by the heat. It would most likely spike then return previous pressure before you could turn the valve.
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| rp181 |
| Posted: 01/19/2010 21:10 PM Post subject: |
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Brigadier General
Joined: 13 Dec 2007
Posts: 1115
1451.97 Spud Bux
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After combustion takes place, a vacuum results from gas products being turned into liquid (water). Basically a gun that sucks things in, handy 
EDIT: and you lose thermal energy; even less pressure.
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| MrCrowley |
| Posted: 01/19/2010 22:07 PM Post subject: |
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Kaleun
Joined: 23 Jun 2006
Posts: 8999
9195.37 Spud Bux
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| Captain Random wrote: | i have a question
if you fill a chamber with some gas, then pump in some air, then ignite the gas, trapping the gas with a ball valve, then flip the ball valve, would the ball valve hold the pressure or would it leak? |
As the others said, the pressure pretty much returns to pre-ignition levels. That's what i've experience anyway when a disk hasn't burst.
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| jackssmirkingrevenge |
| Posted: 01/20/2010 0:28 AM Post subject: |
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aspiring machinist
Joined: 15 Mar 2007
Posts: 18061
32519.23 Spud Bux
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One method of storing pressure from combustion is to use the hot gasses generated to drive a piston which compresses air in a chamber past a check valve. The Sims-Dudley Dynamite Gun used this effect.
Here's what a combustion powered pump could look like:
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| metalmeltr |
| Posted: 02/26/2010 10:32 AM Post subject: |
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Lieutenant Colonel
Joined: 18 Dec 2008
Posts: 430
193.79 Spud Bux
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| 200x for a first hybrid! WHat will you do to beat that?
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