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propane nuke tube

Built a combustion 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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propane nuke tube

Unread postAuthor: NuKe..TuBe..420 » Wed Sep 08, 2010 10:50 am

well this is my second gun ive made the only problems ive had is the ignitor so i ordered a electric ignition system i hope it works better if any one has iseas or see's a problem in my gun let me know
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Last edited by NuKe..TuBe..420 on Thu Sep 09, 2010 4:15 pm, edited 1 time in total.

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Unread postAuthor: qwerty » Wed Sep 08, 2010 11:30 am

Looks good but your reducer looks like DWV
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Unread postAuthor: NuKe..TuBe..420 » Wed Sep 08, 2010 11:45 am

dwv what would that be? my grandpa is a plumber so i got the matrial from him its all sch 40 pipe is that reducer bad to use or something thanks for your input
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Unread postAuthor: Fnord » Wed Sep 08, 2010 12:46 pm

DWV= drainage, waste, vent. Not rated for pressure.

As long as it isn't cellular-core you should be ok using dwv for a combustion(In all probability it isn't. Not sure about your chamber pipe though).

As has been said countless times, sch40 is a wall thickness, not a pressure rating. If you want to use pvc in a pneumatic it should have"nsf-pw" printed on the fitting or pipe(It indicates use in pressurized water systems).
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Unread postAuthor: Technician1002 » Wed Sep 08, 2010 7:48 pm

Fnord wrote:DWV= drainage, waste, vent. Not rated for pressure.

As long as it isn't cellular-core you should be ok using dwv for a combustion(In all probability it isn't. Not sure about your chamber pipe though).


Cellular Core ABS is great for traditional combustions. See my sig for a link to an ABS test.

I do agree that PVC DWV should not be used. It's fragile.
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Unread postAuthor: bighead33 » Wed Sep 08, 2010 9:27 pm

and that's not all he also drilled his electrodes strait onto his chamber wall :shock: . i really hope you aren't planing on firing this this any time soon.
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Unread postAuthor: Lockednloaded » Wed Sep 08, 2010 9:36 pm

I thought we came to the conclusion that DWV is fine for advanced combustions. Now, lets take the DWV, ABS, XZY argument somewhere else.

Great gun for a second, It may need some cleaning up. Once you get your electronic igniter you can mount that plus your fan circuit in a nice looking project box.

Do you get consistent results with that meter?

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Unread postAuthor: NuKe..TuBe..420 » Wed Sep 08, 2010 9:50 pm

yea i put about 40 psi in it turn on the fan and it shoots a potato about 400 yards everytime and im just waiting for my electric ignition to get here to finish evrything up i have a box to mount all my switches in i hate the push button ignitors they always give me problems and as far as my ignition being drilled into my chamber wall every gun ive made has been like that and its never been a problem
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Unread postAuthor: Technician1002 » Thu Sep 09, 2010 12:12 am

My DWV cannon has a fill through the side in a single layer and it has shown no signs of failure. My Mouse Musket fills through a single layer. Overall I have not seen much evidence showing many failures due to the placement of small holes in pipe. Joints, end caps, and fatigue failure of components appears to be more common.
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Unread postAuthor: NuKe..TuBe..420 » Thu Sep 09, 2010 3:13 pm

this gun is less than a week old and ive shot it about 50 times and there's no signs of failure anywhere on some of my past guns which were none propane there would always be burn marks next to my ignitor which i didnt like so know i put some seal all around which can withstand temps up to 180 and its seems to work pretty gun i didnt a test fire today with a 6 ft wire on my ignitor and about 60 psi of propane and i shoot a apple about 700 yards :D it was pretty crazy im in the prosses of making another one out of stronger pipe my goal is to be able to shoot 1000 yards which is the lenght of my corn fieald behind my house
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Unread postAuthor: NuKe..TuBe..420 » Thu Sep 09, 2010 3:21 pm

where can i get a project box at im having trouble finding a good one??
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Unread postAuthor: Technician1002 » Thu Sep 09, 2010 4:54 pm

Radio Shack carries some project boxes. If you don't have one nearby, or they don't carry them, Mouser has them.

As far as reaching the far end of the corn field, good luck. You will need good sectional density and an aerodynamic projectile to reach that far.

http://www.mouser.com/
Project boxes are on this page. They call them enclosures. Project box is a nickname.
http://www.mouser.com/Enclosures/Enclosures-Boxes-Cases/_/N-5g3p?Keyword=box&FS=True
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Unread postAuthor: NuKe..TuBe..420 » Fri Sep 10, 2010 12:15 pm

okay ill check them out thanks and as far as the projectile i have a junk of t4 aluminum that weighs next to nothing an i machine it down to fit in my barrel im hopen it will shoot ok do you have any ideas on a projectile that could reach that distant??
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