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Unread postPosted: Wed Oct 07, 2009 8:43 am
Author: Reactor4
if only one could obtain enough epoxy to fill a dumpster haha :D

Unread postPosted: Wed Oct 07, 2009 8:44 am
Author: jeepkahn
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???

Unread postPosted: Wed Oct 07, 2009 8:50 am
Author: jackssmirkingrevenge
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 :P so pretty thick endcaps should suffice. It's in the pipeline, though at the moment the focus is on my HPA auto devices.

Unread postPosted: Wed Oct 07, 2009 2:56 pm
Author: Ragnarok
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.

Unread postPosted: Wed Oct 07, 2009 3:12 pm
Author: jeepkahn
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...

Unread postPosted: Thu Oct 08, 2009 2:41 am
Author: jackssmirkingrevenge
Ragnarok wrote:Still a bloody long way though. You could have fun at the local driving range.


What have you been up to?

Unread postPosted: Thu Oct 08, 2009 10:59 am
Author: Ragnarok
jackssmirkingrevenge wrote:What have you been up to?

Oh, so that's where it landed. I guess that means I should stop messing with the gravity cannon.

Unread postPosted: Thu Oct 08, 2009 11:08 am
Author: jackssmirkingrevenge
So you're actually partly responsible for Scotland's relatively low life expectancy :roll: :D

Unread postPosted: Thu Oct 08, 2009 11:33 am
Author: Ragnarok
I'm responsible for a whole lot more than that...

Unread postPosted: Tue Jan 19, 2010 9:54 pm
Author: Captain Random
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?

Unread postPosted: Tue Jan 19, 2010 10:02 pm
Author: irisher
The pressure is only momentarily generated by the heat. It would most likely spike then return previous pressure before you could turn the valve.

Unread postPosted: Tue Jan 19, 2010 10:10 pm
Author: rp181
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.

Unread postPosted: Tue Jan 19, 2010 11:07 pm
Author: MrCrowley
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.

Unread postPosted: Wed Jan 20, 2010 1:28 am
Author: jackssmirkingrevenge
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 Gunused this effect.

Image

Here's what a combustion powered pump could look like:

Unread postPosted: Fri Feb 26, 2010 11:32 am
Author: metalmeltr
200x for a first hybrid! WHat will you do to beat that?