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Lardas First Hybrid - HyGaC20

Built a hybrid cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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Unread postAuthor: Reactor4 » Wed Oct 07, 2009 8:43 am

if only one could obtain enough epoxy to fill a dumpster haha :D
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Unread postAuthor: jeepkahn » Wed Oct 07, 2009 8:44 am

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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Unread postAuthor: jackssmirkingrevenge » Wed Oct 07, 2009 8:50 am

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.
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Unread postAuthor: Ragnarok » Wed Oct 07, 2009 2:56 pm

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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Unread postAuthor: jeepkahn » Wed Oct 07, 2009 3:12 pm

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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Unread postAuthor: jackssmirkingrevenge » Thu Oct 08, 2009 2:41 am

Ragnarok wrote:Still a bloody long way though. You could have fun at the local driving range.


What have you been up to?
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Unread postAuthor: Ragnarok » Thu Oct 08, 2009 10:59 am

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.
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Unread postAuthor: jackssmirkingrevenge » Thu Oct 08, 2009 11:08 am

So you're actually partly responsible for Scotland's relatively low life expectancy :roll: :D
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Unread postAuthor: Ragnarok » Thu Oct 08, 2009 11:33 am

I'm responsible for a whole lot more than that...
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Unread postAuthor: Captain Random » Tue Jan 19, 2010 9:54 pm

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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Unread postAuthor: irisher » Tue Jan 19, 2010 10:02 pm

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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Unread postAuthor: rp181 » Tue Jan 19, 2010 10:10 pm

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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Unread postAuthor: MrCrowley » Tue Jan 19, 2010 11:07 pm

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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Unread postAuthor: jackssmirkingrevenge » Wed Jan 20, 2010 1:28 am

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:
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Unread postAuthor: metalmeltr » Fri Feb 26, 2010 11:32 am

200x for a first hybrid! WHat will you do to beat that?
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