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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: Brian the brain » Sat Oct 03, 2009 6:47 am

I think it was "Powerlabs" that fired a golfball at mach 3 using guncotton..

whether the golf balls are going to deform horribly under pressure and jam in the barrel
.

It cleared the barrel, that's for sure.. :D

I would very much like to get the moose pics through pm..as well as some specs about velocity, projectile and such...


just to compare.. :D
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Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
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Unread postAuthor: inonickname » Sat Oct 03, 2009 6:59 am

It's around a 0.2:1 C:B, so tiny.

In all honesty I hate this thread being kicked up, seeing this reminds me I should be building something. I've promised I will after I go pick up the mill slide for my lathe on Monday.
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Unread postAuthor: Reactor4 » Sat Oct 03, 2009 11:34 am

yea my bad guys. I wasnt really paying attention so i just brought it up cuz i didn't feel like reading 18 pages of comments. :(
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Unread postAuthor: jackssmirkingrevenge » Sat Oct 03, 2009 12:10 pm

Brian the brain wrote:I think it was "Powerlabs" that fired a golfball at mach 3 using guncotton...


Mach 2 ;)
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Unread postAuthor: Ragnarok » Sat Oct 03, 2009 1:20 pm

jackssmirkingrevenge wrote:Mach 2 ;)

Went reading, and found this...

Sam Barros wrote:The golf ball then must have had a kinetic energy in the 13000J range, and flown over 10kM (6mi+) horizontally

Like hell it did. Even for that muzzle velocity, half a mile is about the limit for a golf ball.
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Does that thing kinda look like a big cat to you?
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Unread postAuthor: jackssmirkingrevenge » Sat Oct 03, 2009 1:30 pm

Ragnarok wrote:Like hell it did. Even for that muzzle velocity, half a mile is about the limit for a golf ball.


Agreed, even the streamlined, dense bullet from a 50 BMG round leaving the barrel at mach 3 can "only" manage about 7,500 yards.
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Unread postAuthor: spud downunder » Sat Oct 03, 2009 4:57 pm

Hey, so does any one know what happened with the golfball barrel he made? did it work? is he still alive?
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Unread postAuthor: Larda » Tue Oct 06, 2009 5:26 pm

inonickname wrote:
Reactor4 wrote::shock: Damn. I've done machining before, but that is nice! Did you thread those yourself (on a lathe maybe?)


Please don't dig up old threads. It tends to get people annoyed.

Every part was CNC machined by him on lathe or mill.


Actually its only a few parts that i did CNC machine, the lamps to hold the chamber.
I could have CNC machined everything but its a good traning to do it manually. :)
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Unread postAuthor: Willdebeers » Tue Oct 06, 2009 5:33 pm

Your'e so lucky you've got a machine shop!...wait a second...so do I. :D What kind of mill is that you got there? Seems very good.
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Unread postAuthor: Larda » Tue Oct 06, 2009 5:40 pm

I did some shooting with the new barrel and it worked quite well, remember that the CB ratio is around 0.07 so its not very suited as a GB cannon.
I did shoot at some car doors and a 1/4" steel plate,
I am still missing some photos (on my brothers camera) but i can show you some of the results .
I did get just under 700m/s , slightly less then HGDT suggested.
[youtube]http://www.youtube.com/watch?v=ny-cyiec_-w[/youtube]

Did some test shoots with a relay rich air/propane mixture, it did work better then i thought but reduced the muzzle velocity significantly.
[youtube]http://www.youtube.com/watch?v=7o8hCW72yYU[/youtube]
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Unread postAuthor: Reactor4 » Tue Oct 06, 2009 5:48 pm

I could have CNC machined everything but its a good traning to do it manually


Yea I agree. I have lots of experience on CNC (solidworks :D ) and I can say it gives you more a sense of self accomplishment when you do your stuff manually.
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Unread postAuthor: ramses » Tue Oct 06, 2009 7:27 pm

That is amazing. You need to make some darts for the 1.7" barrel.

It makes me kind of sad watching you destroy perfectly good raw materials, but I suppose you have enough of those laying around that it doesn't bother you.

what frame rate did you use on the high speed clips? 600fps from an ex-f1?
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Unread postAuthor: jackssmirkingrevenge » Tue Oct 06, 2009 10:11 pm

New videos, same reaction :roll:

I really do have to build me one of these.
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Unread postAuthor: rp181 » Tue Oct 06, 2009 10:36 pm

But what would you epoxy? :cry:
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Unread postAuthor: psycix » Wed Oct 07, 2009 4:44 am

Easy: take a pipe, take a dumpster. Hole in dumpster. Pipe in dumpster, through hole, fill dumpster with epoxy. Done.
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