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UPCL-495CI

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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UPCL-495CI

Unread postAuthor: SpudBlaster15 » Thu May 03, 2007 8:18 pm

UPCL-495CI
Ultra powerful combustion launcher, 495 cubic inches.

General Description
This launcher utilizes the fuel meter, barrel, and cam locks from my original advanced combustion, but otherwise, it is a massive step upward. Gone is the original 220 cubic inch chamber, as a new 300 cubic inch chamber takes it's place, bumping the ratio up to just over 1.5:1, delivering increased muzzle velocity and noise output. The 97" long barrel accelerates potatoes to speeds unseen with almost all other combustion launchers.

The new chamber confines all wiring and screws to an area invisible on the assembled launcher, making the overall appearance considerably less cluttered. The fan electronics and ignition electronics are now housed within the handle.

Main features

- Solid wall ABS construction.
- 300ci overall chamber volume, and 97" long, 1.6" diameter (195ci) barrel for immense power.
- Electronic ignition with single spark gap placed 40% from the rear of the chamber.
- Propane metering.
- 60mm PC fan wired to a custom battery pack utilizing 7 high quality, high output Sanyo sub C cells.
- Aluminum cam lock based breech load mechanism with dual steel barrel supports.
- 2" Ball valve vent mounted on a 4" endcap for ease of emergency removal.
- Single quick-release handle housing fan and ignition electronics.

Pictures

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Thanks for viewing.
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Unread postAuthor: tylerthetatertosser » Thu May 03, 2007 8:34 pm

that gun looks awsome. I like tha fact it looks very clean. I like the seamless elbow. i also like the fact it has no exposed wires. i like every thing on this gun in fact. I cant wait to go to the range and shoot it with you. so in conclusiion its a good change from original version and it looks good.

tyler
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Unread postAuthor: meatballs » Thu May 03, 2007 10:38 pm

wow, that looks great. no exposed wires, everything is neatly configured, well planned out and assembled. i love it. what sort of speed do you mean by unseen with almost all other combustion launchers (in fps)? that thing is amazing, great work.
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Unread postAuthor: SpudBlaster15 » Thu May 03, 2007 11:28 pm

EVBEC estimates a velocity of 530fps using propane, and 585fps using MAPP gas. As comparison, EVBEC estimates the Blue Flame III (using estimated figures based on the pictures and video) to produce a velocity of 400fps. Some food for thought.

I recently fired it, and disproved my original theory that multiple spark gaps would help the performance of this launcher. The original chamber used 2 spark gaps, and the new one uses one. The hang time test revealed that the new chamber performs substantially better, with an average hang time of 2 seconds higher.
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Unread postAuthor: Hotwired » Fri May 04, 2007 2:26 am

The multiple spark trend is just gibberish, the power comes from the mix not the lil electric sparks.

Looks pretty clean apart from the two white streaks - what are they?
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Unread postAuthor: mega_swordman » Fri May 04, 2007 5:09 am

Nice, clean, and functional. I really like this cannon as well as the handle. That is a very nifty piece. I couldn't help to notice though that your barrel is a bit too long and unstable. In the first picture, it has a lot of bend in it. Apart from that is is a very well put together cannon. :thumbup:
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Unread postAuthor: SpudBlaster15 » Fri May 04, 2007 8:58 am

The two white streaks are actually bar code stickers that I have been too lazy to remove.

The barrel appears to be bent in the picture, and I am not sure why. It actually has only a minor tweak. It is very stable during firing.
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Unread postAuthor: jrrdw » Fri May 04, 2007 6:37 pm

No video? I thought that was a entry requirement to the contest???

Nice cannon, you have a chance of winning!
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Unread postAuthor: tylerthetatertosser » Fri May 04, 2007 10:43 pm

I dont think a video is a requirement for the contest but it would probably help your chances for winning the contest.
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Unread postAuthor: SpudBlaster15 » Fri May 04, 2007 11:36 pm

I just shot an aluminum BMX peg through a refrigerator door. Perhaps tomorrow I will repeat the shot and get it on video.
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Unread postAuthor: bboymatty » Sat May 05, 2007 6:22 am

sounds neat man, your cannon is sweet and very nice, but i fail to see how it is something new or different? dont all combustions look like this?
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Unread postAuthor: SpudBlaster15 » Sat May 05, 2007 9:05 am

Most combustions do not look like this, as many are basic, spray and pray guns, and most advanced combustions have a mess of wires and screws littering the appearance. There are a few that are built cleanly.

However, it is indeed not a new concept, but such can be said for almost every other gun in the contest. Everything has been done before, aside from the miniature pneumatic pen gun.
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Unread postAuthor: spudthug » Sat May 05, 2007 9:09 am

and the revosemi...but anyway i like this gun sb15 its really clean and nice
oh and btw how did u atach the ball valve?
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Unread postAuthor: SpudBlaster15 » Sat May 05, 2007 9:14 am

Ah yes, the RevoSemi has not been done before.

Thanks. I attached the ball valve by drilling a 2" hole in a 4" end cap, then pushing a 2" male threaded adapter through the back, allowing for the lip to catch on the cap. The ball valve was then screwed on, and the cap to adapter connection was sealed with Plumbing Goop.
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Unread postAuthor: spudthug » Sat May 05, 2007 10:15 am

oo cool.. have u tested damage yet with anything?

other than the pegh and that is pretty impressive :shock:
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