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Plague damage preview

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: Technician1002 » Fri Jun 11, 2010 11:17 am

Just a good target I had laying around.

Shoot some empty cans into something and post your photos.

Any combustion guys want to join the party? I would like to see what a combustion does with a lightweight projectile. Is the flame front too slow to do this? Anyone with a pop can barrel combustion?
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Unread postAuthor: Gun Freak » Fri Jun 11, 2010 2:13 pm

Dang I would join in with Superna, but I don't have a soda can barrel. 2.5" sch 40 right?

Oops nvm did a search, 2.5" sdr 26, which is something I can actually get! I want one :twisted:
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Unread postAuthor: mobile chernobyl » Fri Jun 11, 2010 3:08 pm

just use 3" with wadding. I have a sch80 3" barrel I'll use
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Unread postAuthor: Gun Freak » Fri Jun 11, 2010 3:26 pm

A beach towell wadding I suppose? Lol, I think I can get the right kind, if not then I'll use a bigger barrel with wadding.
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Unread postAuthor: Technician1002 » Fri Jun 11, 2010 5:40 pm

A heavy duty shop paper towel works fine. Trust me. :D

It works for launching stuff with a hole all the way through it, like a short piece of conduit.

It is how I launched stuff through the washing machine with the ABS apple cannon and a D cell battery with the marshmallow cannon.
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Photo of the piece of conduit after I took the machine apart to retrieve it. Tried again with the Marshmallow cannon and got a cleaner hole.
It obviously came out tilted from the 2 inch barrel on the ABS cannon.
Image

The heavy blue shop paper towels were the only sabot used to launch the conduit.
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Last edited by Technician1002 on Fri Jun 11, 2010 6:08 pm, edited 2 times in total.
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Unread postAuthor: Gun Freak » Fri Jun 11, 2010 5:49 pm

Cool well I don't have any of that... ehh I like the beach towel idea better :wink:
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Unread postAuthor: Technician1002 » Fri Jun 11, 2010 7:46 pm

For those with smaller valves, you can play too. Here is a can launched from my Marshmallow cannon with a 3 foot barrel.

The launcher is 54 cubic inches
Valve is 1 inch.
Can was launched empty at the edge in an attempt to split the can in half.

Photo below.
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Unread postAuthor: Gun Freak » Fri Jun 11, 2010 7:57 pm

Not bad for the small valve, if I can get my hands on a soda can barrel I will definitely try this. :twisted: :D
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Unread postAuthor: Technician1002 » Fri Jun 11, 2010 9:41 pm

The QDV has a better flow path than a sprinkler valve. :twisted: A 1 inch sprinkler valve does not have this flow rate. It has too many twists, bends, and edges inside for great high speed flow. The QDV may open faster than some piston valves due to the very low pilot pressure when it pops open. Some piston valves with light shell pistons may open faster.
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Unread postAuthor: Gun Freak » Fri Jun 11, 2010 9:49 pm

I'm not shooting a soda can with a sprinkler valve... its a 2 in. piston valve...
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Unread postAuthor: Technician1002 » Fri Jun 11, 2010 10:29 pm

The one inch was for comparison for anyone with small stuff that wants to play too. I've looking to see the vast variety of launched cans and what launched them.

The 1.5 inch port on the 2 inch piston should flow somewhere between the 1 inch and 2 inch valves. You should get a reasonable pancaked can. Due to the size of the port, try to use a 2.5 inch barrel instead of a 3 inch. The lower volume will make better velocity with the air that can flow through the 1.5 inch port. Model it in GGDT to find the best length to launch an empty can. It should be fairly short.

Anyone have a tennis ball barrel on a combustion that can launch a can for me? I want to see how these compare to a combustion.
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Unread postAuthor: c11man » Sat Jun 12, 2010 4:30 pm

tech, those damage pics are both extremly impressive and odd, with all the empy cans i have shot i never had a side blow out. they usualy just smush and endup in 2 peices. was that shot at extremly close range? because at close range the internal pressure of the can would still be high and possible cause a blow out upon impact

and tomaroow Plague is being taken to my uncles farm were i will have a full day to shoot my spuds all i want and i can be as loud as i want. i have a stockpile of both full and empty cans that will be launched and the damage photographed. video is a maybe but if i do it will be filmed in 1080i for the veiwing pleasure of spudders everywere!
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Unread postAuthor: Gun Freak » Sat Jun 12, 2010 4:55 pm

Cool! Can't wait for photos/videos... does your uncle grow potatoes? :twisted: :D
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Unread postAuthor: Technician1002 » Sat Jun 12, 2010 7:41 pm

was that shot at extremly close range?


The distance is shown in the photo on the second page. Muzzle to target is about 6 feet to reduce can rotation.
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Unread postAuthor: mobile chernobyl » Mon Jun 28, 2010 5:57 pm

Here is what I got sofar, the tests were done at 20, 40 and 60 psi since it was done in my "indoor firing range" aka my basement.

I also attempted the "can cut in half" with a garden hoe... I couldnt find my Machete :( If i find it and remember to do this... I think the "halving" will be cleaner.

Tests were done against a concrete wall. It didn't move...

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Last edited by mobile chernobyl on Mon Jun 28, 2010 6:12 pm, edited 2 times in total.
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