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mortar

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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Unread postAuthor: NoXi » Sat Jun 09, 2007 2:09 pm

Hi, this is gonna be my first combustion cannon. I have build mini-combustions in the past but nothing this big. I have decided to build a airsoft mortar. I am going to use combustion because i dont have all the things to build a pneumatic. I was wondering how big the chamber should be if i used a 1.5" barrel that is 2.5 ft long.

Thanks
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Unread postAuthor: Arborman » Sat Jun 09, 2007 2:32 pm

I would use about 8 inches of three inch pipe.

that is about 1:1 C:B.

but thats just me.

If you want to go quiet or, you plan on using a fan/propane, i would reccommend 5-6"of 3" pipe. This is the .8:1 C:B......

or darn near it
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Unread postAuthor: NoXi » Sat Jun 09, 2007 3:08 pm

hmm, im not thinking of using fan/propane. Im jus gonna use like hair spray and such. Ill prob use propane later on. It doesnt matter if it is loud or quiet so ya. is there any other suggestions. also, what would i need to make the chamber?(ex. end cap, etc.)
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Unread postAuthor: noname » Sat Jun 09, 2007 4:49 pm

3" cleanout plug
3" female adapter
3" pipe (about 1 foot - 6" should be fine)
3" x 1 1/2" reducer
1 1/2" male adapter
1 1/2" female adapter

Cement it together from top to bottom on the list, back to front on the cannon.
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Unread postAuthor: NoXi » Sun Jun 10, 2007 12:00 am

i didnt buy a male adapter but all i bought is the 3" cleanout plug, female adapter, 3"pipe and i had some 1.5" already at home. What would u need the male adapter for?
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Unread postAuthor: noname » Sun Jun 10, 2007 12:01 am

If you get a 1 1/2" male adapter and a 1 1/2" female adapter you can make the barrel detachable.
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Unread postAuthor: NoXi » Sun Jun 10, 2007 9:20 am

oh ic, well its to late now. Today, im gonna glue them all together. Thanks everyone.
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Unread postAuthor: jrrdw » Sun Jun 10, 2007 2:07 pm

I thought a morter was just a tube you droped ammo into? Minus all the stuff about proplents ect...
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Unread postAuthor: NoXi » Sun Jun 10, 2007 2:24 pm

well its gonna be hard to make it like that so im jus gonna make a reg spud gun that is a lil shorter and put a tripod or bipod.
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Unread postAuthor: lukemc » Sun Jun 10, 2007 2:40 pm

i would suggest to make it more functionable you have a chamber fan and a 1.5" ball valve coming oput of the side so you can open it the smoke will blow out and and you can spary your deoderant or what ever in it. like this

Image
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Unread postAuthor: NoXi » Sun Jun 10, 2007 4:15 pm

hmmm..thats a good idea, i can try that but i dont have a chamber fan or a ball valve right now

edit: Also, can anyone help me design a nice bipod. I would like it to be made out of pvc or something like it. I was thinking of using a airsoft bipod and put a small ris rail on the bottom of the rail.
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Unread postAuthor: lukemc » Sun Jun 10, 2007 5:00 pm

http://www.spudfiles.com/forums/viewtopic,p,94023.html#94023

you can get a chamber fan from almost any online store but this guys selling some too and the money ges into the developement of spudguns :wink:
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Unread postAuthor: NoXi » Sun Jun 10, 2007 5:05 pm

wow thats cheap, why dont u buy it for me :D.

also, someone help me design a nice bipod please!1!1!!!1
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Unread postAuthor: jrrdw » Sun Jun 10, 2007 6:35 pm

NoXi wrote:wow thats cheap, why dont u buy it for me :D.

also, someone help me design a nice bipod please!1!1!!!1


Welcome to spudfiles, try searching through the advanced search features before asking how to do it. When you see how other members build things you will get your own idea's and become a good builder in your own time, and be happier about it, and be self taught. There's only one better feeling that i know of! Hehehe.
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Unread postAuthor: NoXi » Sun Jun 10, 2007 7:38 pm

well, i already searched, but i havent seen anything on how to make a bipod. Even though people have bipods, its hard to see cuz they dont have close up pics on it.
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