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"In the world of spuds today"

A place to ask general spud cannon related questions.
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Unread postAuthor: ramses » Sat Jun 11, 2011 8:26 pm

Gun Freak wrote:
MrCrowley wrote: it would be interesting what I could shoot through with a 48mm bore barrel hybrid

Thats for sure... There's all this talk about firing specialized projectiles out big bore hybrids then barely anyone does it... I wanna see a video, damage, possibly some high speed footage if possible.


I shot a 3/8" AP dart at 1/2" steel plate with a small hybrid. The very tip made it through, but nothing else did. That was around 8x. I want a fridge compressor so I can try 15x.
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POLAND_SPUD wrote:even if there was no link I'd know it's a bot because of female name :D
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Unread postAuthor: MrCrowley » Sat Jun 11, 2011 8:35 pm

Gun Freak wrote:
MrCrowley wrote: it would be interesting what I could shoot through with a 48mm bore barrel hybrid

Thats for sure... There's all this talk about firing specialized projectiles out big bore hybrids then barely anyone does it... I wanna see a video, damage, possibly some high speed footage if possible.

LeMaudit's projectile is on the way to me as we speak, perhaps I can re-use the sabot for a penetration projectile in the future :D
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Unread postAuthor: jackssmirkingrevenge » Sat Jun 11, 2011 9:20 pm

MrCrowley wrote:perhaps I can re-use the sabot for a penetration projectile in the future :D


If you can find it :) from what I gather a simple UHMWPE cup isn't too hard to machine...
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Unread postAuthor: LeMaudit » Sat Jun 11, 2011 9:33 pm

perhaps I can re-use the sabot for a penetration projectile in the future


I doubt it, due to its specialized tail shape.
I'll make you another one ;-)
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I HAZ A BANG!
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Unread postAuthor: Zeus » Sat Jun 11, 2011 10:53 pm

I was on a "hope" mission<sup>1</sup> on Instructables, when I happened across this.

Just thought I'd share, it's simple enough and certainly not new, but I'm glad to see something good come out of Instructables.

<sup>1</sup> A hope mission is when I go through usually woeful sites looking for useful information.

Like scratching through a cesspit looking for dropped change.
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/sarcasm, /hyperbole
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Unread postAuthor: irisher » Sun Jun 12, 2011 12:16 am

I'm pretty sure I've seen this posted somewhere else on spudfiles. JSR, your search skills are needed.
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Unread postAuthor: jackssmirkingrevenge » Sun Jun 12, 2011 2:58 am

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Unread postAuthor: Zeus » Mon Jun 13, 2011 3:46 am

As that valve would have rather low performance, I didn't think anyone would bother with it here. Thus I didn't bother doing a cursory search.
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/sarcasm, /hyperbole
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Unread postAuthor: Labtecpower » Thu Jun 16, 2011 9:23 am

Today I cut off the ring on the QDV. I shot a 400 gram projectile at 8 bar, and it hurt me pretty bad. (as Tech expected :D)

Image

I put one some filler , as the welded spots left dimples in the surface. I will paint it in a while, but I want to put on a shoulder sling connection on first.
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"ñøw mÿ šįg šüçkś!"
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Baggie inside a monitor

Unread postAuthor: Technician1002 » Fri Jun 17, 2011 10:37 pm

In the smaller version, I had my grandkids over this afternoon. We had a dead CRT monitor to dispose of. After disassembly to salvage some parts, we recycled the glass. :D

The unexpected happened. We were launching rocks (gravel pebbles) backed by plastic shopping bags. The sabot followed the projectile close enough to get sucked completely inside the tube. It was retained by the metal screen inside and spread out.

Enjoy the photo.

Yes the poka dot pattern in the lower corner is part of the plastic bag.

@Labtec; Now you have an idea of what the 32 oz Gateraid shot was like. A 32 oz Gatoraid is about 1 Kg in weight. Nice job Labtec. Looks good.
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Attachments
crt.JPG
Plastic bag wad inside a CRT.
crt1.JPG
Broken CRT
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Unread postAuthor: HACKERZLORD007 » Sun Jun 19, 2011 1:36 pm

Hey guys... Just a small question I wanted to ask .... So I was wondering if there was any way to build a pneumatic gun which could either match the performance and muzzle velocity of a hybrid gun? Also if it was possible to build a pneumatic which could beat the hybrid gun? Help would be appreciated....thnx guys!

Cheers
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Unread postAuthor: Technician1002 » Sun Jun 19, 2011 1:43 pm

Due to the physics involved in a hybrid, air is too dense to provide velocities very much above the speed of sound.

With heavy dense projectiles air does fine as the heat of combustion is relatively short in duration.

With lighter projectiles, an air cannon won't match a hybrid.
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Unread postAuthor: saefroch » Sun Jun 19, 2011 1:43 pm

It depends on what the construction of both is, and what mix the hybrid is running at as compared to the pressure the pneumatic is running at. But... if I were to have two identical builds, and run them as close to failure as I felt comfortable, the hybrid would best the pneumatic.

If you're trying to beat out a hybrid with a pneumatic, we may or may not be able to help. We'd need more information.
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Unread postAuthor: Labtecpower » Sun Jun 19, 2011 1:57 pm

@Labtec; Now you have an idea of what the 32 oz Gateraid shot was like. A 32 oz Gatoraid is about 1 Kg in weight. Nice job Labtec. Looks good.


twice as heavy as my projectile :shock:
Must have hurt!
I was standing on a small transformer house when I fired it. It nearly knocked me off.

You have the advantage of weighing twice as much as me :D

Shooting at a CRT looks fun :)
I have very little trash lying around where I can shoot at. I don't think my parents would appreciate it if I shot a glass object in the garden...
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Unread postAuthor: Technician1002 » Sun Jun 19, 2011 3:37 pm

I do have fun at camp when a scrawny guy plays the macho thing and wants me to pump it up. I go ahead and pump it up. Knocked one guy over just shooting a can of pop at 100 PSI.
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