Lardas First Hybrid - HyGaC20

[Brian the brain]

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..

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..

[inonickname]

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.

[Reactor4]

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.

[jackssmirkingrevenge]

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

Mach 2

[Ragnarok]

Mach 2

Went reading, and found this...

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.

[jackssmirkingrevenge]

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.

[spud downunder]

Hey, so does any one know what happened with the golfball barrel he made? did it work? is he still alive?

[Larda]

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.

[Willdebeers]

Your'e so lucky you've got a machine shop!...wait a second...so do I. What kind of mill is that you got there? Seems very good.

[Larda]

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][/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][/youtube]

[Reactor4]

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 ) and I can say it gives you more a sense of self accomplishment when you do your stuff manually.

[ramses]

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?

[jackssmirkingrevenge]

New videos, same reaction

I really do have to build me one of these.

[rp181]

But what would you epoxy?

[psycix]

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