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UPCL-505CI V2.0

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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UPCL-505CI V2.0

Unread postAuthor: SpudBlaster15 » Fri Dec 18, 2009 2:44 am

UPCL-505CI V2.0

This launcher was actually built way back in February 2008, but my dwindling interest in the hobby kept it from really being completed to satisfaction. It sat in my shop half assembled for a year and a half, and was fired only a handful of times after May 2008.

I recently regained my interest in spudding, and decided to pull the cannon out of storage, and fix it up to meet the standards I had originally set years ago.

Features

- Solid wall ABS construction.
- 340ci chamber built using an internal fitting design to create a clean, streamlined appearance, and a very strong backbone for the launcher.
- Strategically located inner double layering to allow for hidden placement of the screws and most wiring, while maintaining maximum chamber integrity.
- Dual spark gaps wired in series.
- 3" nominal diameter chamber elbows to minimize flow restriction through the 180 degree bend.
- 7' long, 1.5" SCH40 barrel. The ideal barrel diameter for most potatoes.
- Breech loading through 2" aluminum cam-lock fittings.
- Unregulated fuel metering system, designed to operate with just one injection at 50PSIG using Propylene gas.
- 2" ball valve for quick, easy, and efficient venting
- Rear chamber access plug/vent mount constructed from threaded adapters and reducing bushings for a very strong and leak free setup.
- Simple and effective barrel support design.
- 60mm computer fan with 18V power supply, mounted using the hybrid electrode/mount system I devised way back in 2006.
- Dual handle design, with the ignition setup in the rear handle, and the fan electronics, wiring, and switch housed in the front.
- Color coded 16AWG wiring with crimp connectors and battery snaps.
- 10-32UNF Stainless Steel ignition and fan electrodes with bonded seal washers to prevent leaks.
- Noise enhancer attachment for increased loudness and projection of sound.
- 22 month old flat black paint job.

Pictures

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Hope you enjoy the first cannon I've posted on here in nearly 2 years...
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Last edited by SpudBlaster15 on Fri Dec 18, 2009 11:18 pm, edited 1 time in total.
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Unread postAuthor: McCoytheGreater » Fri Dec 18, 2009 2:59 am

There's just something about combustion guns. Makes me ready for my next build. How do the internal fittings work? Can we get a diagram of sorts?
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Unread postAuthor: starman » Fri Dec 18, 2009 3:43 am

A little noisy trumpet flare for your muzzle ehh... :wink:

Classic over and under...nice job SpudB. Your usual excellent design, fit and finish standards. 7' is a lot of barrel there so I'm sure your velocities are up there. Also, that being a 1.5" barrel system, it would be easy to fit up an SDR21 golf'n ball barrel on there....

Mayyyybee and little operational vid...??
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Unread postAuthor: psycix » Fri Dec 18, 2009 6:11 am

Clean build, not much more to say.
Just a very well built advanced combustion, keep up the good work!

The only thing I think that can be improved is the muzzle "trumpet". Maybe you could cut some porting to give it a more muzzle break look?
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Till the day I'm dieing, I'll keep them spuddies flying, 'cause I can!

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Unread postAuthor: Moonbogg » Fri Dec 18, 2009 12:22 pm

Nice cannon. I like the full sized, fully loaded appearance. I am a fan of the over under design layout and this is nicely done. Nice breech loading. By the way, those fittings look beefy and strong. Are they solid ABS also?
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Unread postAuthor: velocity3x » Fri Dec 18, 2009 1:49 pm

I don't know anything about combustion launchers but, I think it has a great design and appearance!
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Unread postAuthor: JDP12 » Fri Dec 18, 2009 3:58 pm

OK, well... aparently my post got deleted.

Nice launcher SB15. I remember the original post and thought it was cool then- this one is even better I believe.

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Unread postAuthor: SpudBlaster15 » Fri Dec 18, 2009 4:05 pm

Thanks for the kind words everyone...

How do the internal fittings work? Can we get a diagram of sorts?


I'll draw a diagram for you tonight; right now I'm about to go shoot some spuds, since it is above freezing for the first time in more than a month.

7' is a lot of barrel there so I'm sure your velocities are up there. Also, that being a 1.5" barrel system, it would be easy to fit up an SDR21 golf'n ball barrel on there....

Mayyyybee and little operational vid...??


I considered a golf ball barrel, but it's difficult to find 1.5" SDR21 PVC around here. If I can find some, I'll definitely pick up a good sized length.

A video should be possible, but I'll need a new cameraman, since tylerthetatertosser is dead (Figuratively speaking).

The only thing I think that can be improved is the muzzle "trumpet". Maybe you could cut some porting to give it a more muzzle break look?


I might consider something like that, but for now I think it looks and functions just fine.

EDIT: Sorry, missed your question Moonbogg.

By the way, those fittings look beefy and strong. Are they solid ABS also?


Yeah, they are. I've switched almost entirely to Canplas ABS fittings, as they are the beefiest and strongest I have come across.
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Unread postAuthor: SpudBlaster15 » Fri Dec 18, 2009 7:26 pm

I just did some distance shooting, and the range with a properly cut potato slug is quite impressive. I fired about a dozen shots down a road in the middle of nowhere, and of the rounds that I could recover, the furthest shot traveled approximately 880 feet, or nearly 300 yards.

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Unread postAuthor: JDP12 » Fri Dec 18, 2009 7:46 pm

that's very impressive SB- especially for an ordinary potato and nothing too sophisticated
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