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Mini BP Mortar

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Mini BP Mortar

Unread postAuthor: Killjoy » Thu May 31, 2007 12:28 am

I generally use hydrogen and oxygen and oxygen and acetylene, but because of the mortar's size the golf ball doesn't go very far (maybe 75 to 100 yards or so, but i haven't really done any range test). I do however use BP and BP/FP mix occasionally.

Well a couple weeks ago i was bored and out of cash, so i went looking around for parts to make a cannon with. I found an 8" long peice of sch 80 2" steel pipe left over from fear, so i decided to make a mini mortar.

It basically consists of a 3/4" thick steel plate welded to the 2" steel pipe.

After initial testing with black powder (the intended propellent) i was not getting the results i wanted (too much BP and it was to fine and the projectile wasn't tight fitting as i found out later). So i poured 3 grams of flash powder into a foil packet, put it in the cannon, added a fuse and poured in a little black powder and pushed in a wadded golf ball. When it fired, i was could seriosly "feel" the bang (theres a word for it but i can't rememeber) and my ears were ringing from the blast (i was 20 feet back partially behind my blast barrier). I ran over thinking the pipe had burst, but found that it was completly fine, and the golfball had gone through the 2"x6" i was firing at.
Heres the video.
http://s122.photobucket.com/albums/o266/uckilljoy/?action=view&current=MOV00157.flv

I added some finishing touchs, including a folding bipod stand and a mechanical firing mechanism which is triggered by a pull string and uses modifyied .22 blanks (i use a fuse for the FP/BP charge to be far away, and the firing mechanism for anything else like oxy hydrogen/acetylene or regular BP). The FP/BP charges are now restricted to 1gram of FP and a little BP.

some pics
Image

Folded for storage/transport
Image

Firing mechanism cocked
Image

as a side note,
Before anyone gets worked up, this is not against forum rules as they prohibit the firing of solid propellents specifically from a spud gun, and seeing as this mortar also uses oxy acetylene and oxy hydrogen, i don't really see how it could be against the forum rules (and need be i'll remove the part about the use with BP).[/url]
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Last edited by Killjoy on Fri Jun 08, 2007 12:30 am, edited 3 times in total.
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Unread postAuthor: origin unknown » Thu May 31, 2007 12:43 am

That kind of reminds me of this bowling ball mortar.Image
Cool cannon!

The forum rules are for keepin the feds away and for us to be totally "safe".
The H+2O --> H2O reaction is just as and even more dangerous than most solid propellents.
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Unread postAuthor: Killjoy » Thu May 31, 2007 12:48 am

Yeah i understand why the rules are there, but seeing as someone else posted a black powder cannon and got away with it (i think it was spudthug), i figured ya'll might want to see this and i had this urge to show it around. And anyway this isn't illegal since its a muzzle loaded smooth bore cannon and is considered an antique.
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Unread postAuthor: zeigs spud » Mon Jun 04, 2007 6:16 pm

i don't think he ment you shouldn't of posted lol. that is probably the one breakable rule in this forum. just this one though...don't get ideas lol :D
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Unread postAuthor: ammosmoke » Mon Jun 04, 2007 6:37 pm

I like it! Yeah I made a copper cannon that used bottle rocket blasts to fire corks and sabots, and pretty much anything else that fit. I could hold it in my hand, and pow!!! Very fun.
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Unread postAuthor: Killjoy » Fri Jun 08, 2007 12:28 am

yeah zeigs guess i mis interpreted what he was saying, and don't worry i'm not getting any ideas.
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Unread postAuthor: turbohacker » Fri Jun 08, 2007 12:50 am

Wow, oxy ace :shock:
You are officially nuts!!!
I congratuate you :P
Next step is C4 :twisted:
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Unread postAuthor: Killjoy » Sat Jun 09, 2007 12:00 am

yep, just need the nitric acid to make the rdx lol.
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