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FINALLY Completed Howitzer

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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FINALLY Completed Howitzer

Unread postAuthor: thunderskunk » Sun Jun 22, 2014 9:50 pm

Good evenin folks!

I've been waiting months for this. This gun has gone from a vintage-looking wooden carriage with shells the size of large spud gun chambers into a pretty distinguishable howitzer.

My original idea was to use gigantic shells, and a rifled barrel. The barrel rifling... didn't work out. The jig worked, the cutters worked, but it was an extremely slow and lengthy process. I think I'll try making a soldering-gun tip so I can burn the grooves in, something a machinist buddy of mine mentioned.

My original carriage fell apart, and I threw out the frame because I had to keep the chamber, barrel, and two shells in my dorm room for a few months. Brought it home thinking I could get it to work the way I intended. Welded a heavy duty frame up, tore apart an old bicycle for parts, and made it look cool. The shell thing... no dice. I couldn't get them to ignite using spark plugs.

I got some new parts and made my shell-holding chamber into just a chamber. I cut the ends off my shells and made them into mini-shells that just hold a potato. They've got a cable going down the middle so I can push them up the chamber and extract them with the sacred shell retrieval staff (pipe with a hook). The back door has an interrupted thread and four handmade rubber gaskets. I certainly had some issues getting a good seal to start with, but I eventually got it to stop leaking.

This is one of my favorite projects I've ever done. I learned a lot about the difference between half-a**ing and doing professional quality work. Even when I couldn't get the gun to fire, it still looked good. This is my first combustion cannon build, and I don't think I'll be making any more for a while, haha.

By the way, it's called The Projectile Impregnator.

This is a video of a firing comparison:

https://www.facebook.com/photo.php?v=71 ... =3&theater

And the link to the photo dump for all the build pictures:

https://www.facebook.com/media/set/?set ... 700&type=3
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Full gun, as is now with the new chamber door
Note the interrupted threading
Back of chamber with the door locked. Note the winch elevation
Clip of a video from firing. The muzzle brake looks pretty dang cool
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Re: FINALLY Completed Howitzer

Unread postAuthor: bravootome » Sun Jun 22, 2014 11:02 pm

i a war situation you are prepared,. Lot of work to build it ....and nice product. If i would of make that and shoot it in open field, in max 1 week 5 police car and 10 special forces would knock knock knocking om my wood door...

i always wanted to make one to shoot beer bottles into a brick wall in high speed.............
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come undone
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Re: FINALLY Completed Howitzer

Unread postAuthor: jackssmirkingrevenge » Tue Jun 24, 2014 9:13 am

Sweet, sweet build!

My only complaint would be that the skinny bicycle wheels make it lack a bit of gravitas, but otherwise fantastic job!
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