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UPHL-158CI (SB15's hybrid lives!)

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: SpudBlaster15 » Fri Apr 09, 2010 3:55 am

I have added 7.5" of ABS couplers to the breech area of the barrel, which means the first 10" of the barrel pipe is now sleeved with (at least) an additional wall thickness. This should reduce the possibility of it failing in the area where the pressure is highest.

This barrel is over 3 years old (Taken from my advanced combustion launcher), and has seen hundreds of shots, so I'm not sure how many more pressure cycles it will be able to withstand. Hopefully the sleeving proves sufficient to keep it together.

Here are some pictures of the sleeved barrel:

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The sleeving was done in preparation for the firing of this round, which at nearly 160 grams should create rather significant barrel pressures, and one hell of a recoil.

Image
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Unread postAuthor: SpudFarm » Fri Apr 09, 2010 5:11 am

SpudBlaster15 wrote:I have added 7.5" of ABS couplers to the breech area of the barrel, which means the first 10" of the barrel pipe is now sleeved with (at least) an additional wall thickness. This should reduce the possibility of it failing in the area where the pressure is highest.

This barrel is over 3 years old (Taken from my advanced combustion launcher), and has seen hundreds of shots, so I'm not sure how many more pressure cycles it will be able to withstand. Hopefully the sleeving proves sufficient to keep it together.



That was a smart move, one whould think that such a wall thickness would stand up to a 5x. Earlier almost every hybrid where PVC and had "large" diameter chambers.

You have to promise that you don't fire anything off camera when you are ready.
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Unread postAuthor: SpudBlaster15 » Fri Apr 09, 2010 1:48 pm

SpudFarm wrote:You have to promise that you don't fire anything off camera when you are ready.


I just obtained a new tripod for my camera, so I'll be sure to film as many shots as possible.

Unfortunately, it doesn't shoot HD video, but the sound capture is better than any other camera I've used. Here's a demonstration my friend SWIM filmed last summer when I lent him the camera.
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Unread postAuthor: SpudFarm » Fri Apr 09, 2010 2:17 pm

SpudBlaster15 wrote:
SpudFarm wrote:You have to promise that you don't fire anything off camera when you are ready.


I just obtained a new tripod for my camera, so I'll be sure to film as many shots as possible.

Unfortunately, it doesn't shoot HD video, but the sound capture is better than any other camera I've used. Here's a demonstration my friend SWIM filmed last summer when I lent him the camera.


That will do fine, but I do strongly recomend the EX-F1. Might not have the best quality pictures and videos but it sure compensate with all it's other qualities.

I was looking at the video and thought he would shoot the computer or something so I almost fell of my chair :P It's a miracle he have all his fingers...

Edit: is there any way you could measure the velocity of that battery?
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Unread postAuthor: SpudBlaster15 » Fri Apr 09, 2010 7:35 pm

SpudFarm wrote:That will do fine, but I do strongly recomend the EX-F1. Might not have the best quality pictures and videos but it sure compensate with all it's other qualities.


I'm planning to buy one as soon as I can afford it. Being able to shoot high speed video will be fantastic.

I was looking at the video and thought he would shoot the computer or something so I almost fell of my chair :P It's a miracle he have all his fingers...


Yeah, it's a bit misleading isn't it? :P

Edit: is there any way you could measure the velocity of that battery?


I'll talk to a friend and see if he still owns a shooting chrony. HGDT estimates ~550fps at a 5x mix, which would give the round roughly 1600ft-lbs of kinetic energy. Anyone know off hand what the highest muzzle energy achieved by a handheld 1.5" bore cannon is?
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Unread postAuthor: SpudFarm » Sat Apr 10, 2010 6:17 am

SpudBlaster15 wrote:
SpudFarm wrote:That will do fine, but I do strongly recomend the EX-F1. Might not have the best quality pictures and videos but it sure compensate with all it's other qualities.


I'm planning to buy one as soon as I can afford it. Being able to shoot high speed video will be fantastic.

I was looking at the video and thought he would shoot the computer or something so I almost fell of my chair :P It's a miracle he have all his fingers...


Yeah, it's a bit misleading isn't it? :P

Edit: is there any way you could measure the velocity of that battery?


I'll talk to a friend and see if he still owns a shooting chrony. HGDT estimates ~550fps at a 5x mix, which would give the round roughly 1600ft-lbs of kinetic energy. Anyone know off hand what the highest muzzle energy achieved by a handheld 1.5" bore cannon is?


You can consider the EX-FH20 it is a tiny bit slower but takes better pictures. It is almost half the price of the F1 in Norway.

What battery is it? I want to shoot the same projectile at the same pressure to find out if it accelerates much after the first few feet in the barrel.
1600 ft-lbs from a barrel that short will probably hurt a bit :D
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Unread postAuthor: SpudBlaster15 » Sat Apr 10, 2010 3:16 pm

It's a standard alkaline D cell, wrapped with duct tape to allow it to fit the barrel properly. You have a slightly larger barrel, so for a fair comparison, you might want to use a discarding sabot.
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Unread postAuthor: SpudBlaster15 » Sun Apr 18, 2010 1:45 am

I recently made some upgrades to this launcher. The bottom mount pressure gauge was replaced with a 0-160PSIG back mount gauge, and the T fitting was rotated to place the gauge in an outward facing position. A foam recoil pad has been added to the rear of the stock, and is affixed using zip ties. I shortened the ignition wires, and swapped the problematic spark plug for the unit from my 3 year old original hybrid. The barrel has also been shortened to 48" to allow for easier portability and better ergonomics. According to HGDT, the muzzle energy will only drop by ~5%.

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The 160g battery slug has been fired, and the recoil was as expected: substantial. I have a video of the shot; it was supposed to be fired at a CRT monitor from a distance of ~50ft, but I missed the target by a few inches, and the projectile collided with the dirt hill beneath it. However, the monitor would eventually meet its maker...

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Unread postAuthor: Moonbogg » Sun Apr 18, 2010 4:54 pm

LOOOL! Holy crap dude hahaha! Nice vid!
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Unread postAuthor: SpudFarm » Mon Apr 19, 2010 2:15 pm

The video won't work here SB -.-
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Unread postAuthor: SpudBlaster15 » Mon Apr 19, 2010 7:57 pm

Works fine for me. :? Here is the direct link.
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Unread postAuthor: JDP12 » Mon Apr 19, 2010 10:44 pm

Haha wow impressive vid and hybrid gun! Its much more aesthetically pleasing now
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Unread postAuthor: SpudFarm » Tue Apr 20, 2010 10:42 am

SpudBlaster15 wrote:Works fine for me. :? Here is the direct link.


It worked today..
Pretty impressive noise it makes. The classic hybrid sound.
More vids please :P
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Unread postAuthor: SpudBlaster15 » Tue Apr 27, 2010 10:17 pm

SpudFarm wrote:More vids please :P


As you wish. :P

New video and updated pictures added to the original post. I fired 4 shots at a computer; the first three were regular potato slugs, and the last one was a 100g rock. The potatoes didn't do much damage (I'm fairly sure they didn't even leave the barrel intact), but the rock pierced both sides of the case and the motherboard.

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Unread postAuthor: SpudFarm » Wed Apr 28, 2010 9:04 am

Good job.
The beauty of hybrids is their ability to throw heavy things very fast.

You should make a APFSDS round and try to penetrate some steel. A 1/4" steel plate with a hole from a handheld cannon would be cool. Try to use a thick penetrator though :P
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