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D V1.0

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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D V1.0

Unread postAuthor: Buntyspudbaby » Tue Aug 05, 2014 5:55 am

I would like to present to you all, Deuteragonist. It is a modest sized advanced combustion. Metered propane, chamber fan, 3 ignition points and rubber for protection, and insulation.
DSCN1215.jpg

I designed the cannon to shoot golf balls. The 40mm diameter barrel suits them perfectly and has indentations, two to stop the ball entering the chamber and three in front of them which are less pronounced to wedge the ball in place. I saw the detent tool and liked the idea, so I whipped up my own one.
DSCN1132.jpg

DSCN1135.jpg

The chamber volume is 95 cubic inches. It is 50mm in diameter and I put it together in sections.
DSCN1142.jpg

One section of which I installed the chamber fan is a threaded coupler with a joining piece of pipe glued in place. I terminated the power cables through the mounting bolts. The elbow section was put together the same way, with one joining piece glued in place. This allowed me to drill and thread the brass nipple into place. For this I used a 19mm spade bit, and a non tapered threaded brass pipe (the thread was the entire length of this pipe) was used to stretch a thread into the hole. I was aware once I had threaded the hole, that the way which I did this did not produce full thread depth and the nipple was not protruding far enough inside to place a nut. So I mixed some epoxy and coated the brass nipple, and the space between the male and female thread allowed a good amount of epoxy the entire thread length. I then surrounded the nipple inside the pipe with epoxy, enough to create a flat surface.

All of the pvc exterior has a pn18 rating, and the joining pipes have a pn9 rating.
DSCN1209.jpg

DSCN1223.jpg

DSCN1224.jpg

DSCN1220.jpg





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Last edited by Buntyspudbaby on Tue Aug 05, 2014 6:46 pm, edited 2 times in total.
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Re: D V1.0

Unread postAuthor: jrrdw » Tue Aug 05, 2014 7:43 am

Nice work! :D
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Re: D V1.0

Unread postAuthor: jackssmirkingrevenge » Wed Aug 06, 2014 9:42 am

Nice! Those first two rounds through the same hole were awesome :D

How thick was the target material?
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Re: D V1.0

Unread postAuthor: Talk » Wed Aug 06, 2014 1:12 pm

Nice but why only 20 psi? more psi more fun :)

How thick was the target material?

material.JPG


I think this was target material measurement.
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Re: D V1.0

Unread postAuthor: Buntyspudbaby » Wed Aug 06, 2014 7:20 pm

Thank you.

Yes, 14mm plywood (2 pieces of 7mm)

:wink: I was happy with a hit on the board at the time, but I could add some sights and do some long distance shots? Maybe a video for the future.
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Re: D V1.0

Unread postAuthor: Buntyspudbaby » Thu Aug 07, 2014 4:43 pm

Talk wrote:Nice but why only 20 psi? more psi more fun :)


As the name suggests there will be larger volume in the future :)
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Last edited by jrrdw on Fri Aug 08, 2014 6:17 am, edited 1 time in total.
Reason: Fixed quote tag.
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