Scorpion Class Platform.

Boz · Posted: 10/15/2006 1:05 AM Post subject:

Scorpion Class Multi-barrel Platform
Type of Cannon- Pneumatic
Chamber Size- 3" by 2 1/2' tanks x 4
Barrel Size-
"Long Tom" Barrel is 254cm / 3.81cm ID
"Devastator" Barrel is 203cm / 5.08cm ID
Pneumatic
--Gas Source - Compressed Air
--Valve - Side selectable shut-offs with a 1" Sprinkler Trigger
--Other Special Details
- Designed to fire one side of air tanks at a time.
- Breech loaded - Bolt action (Air through bolt design)
- Nicknamed "Scorpion Class" in part to the framework the airtanks screw into
- Servicable! All airtanks unscrew incase need for replacement, Triggervalve 100% removeable / Replaceable. Very modular cannon.

This is my first pneumatic. I originally set out to built a base defence paintball cannon. I wanted the operation to be simple + quick, and allow for more than one shot before the tanks would need to be recharged. I designed a 4 tank platform, with shut off valves allowing for a 2 tank-per-shot discharge. The trigger is a pneumatically modified 1" Sprinkler Valve.

The barrel system is interchangeable. The first barrel made is a more complicated, bolt-action, breech loaded system for quick round replacement. This design was intended for use during paintball. I equiped this barrel with a ghost ring style aperture sight, and loaded into this a 40 round paintball Sabot. The results were more than adequate. This barrel is roughly 80 inches long with a 2 inch ID. I have fired selfmade slugs through the barrel and achieved roughly 250yard shot. However the paintballs will never go this distance.

The second barrel is nicknamed "Long Tom". This is a more traditional "Spud" barrel. I made this one for firing distance rounds. I have yet to test this as I need more land to fire it on. The barrel has a smaller ID of 1.5inch and the length increased to 100inches to offset the one trigger valve system.

I decided to only use one sprinkler valve as I was not trying to make an extremely powerful cannon. Remember the intended use is for paintball, which means people will be on the recieving end. I must say the power results from a single 1" sprinker valve is above what I would need. The Long Tom barrel is for recreational distance launches, and to help with the valve bottleneck I have increased barrel length, while reducing ID to keep within the volume. I still keep to the 2 tank discharge, Not sure all 4 would really make a difference. Maybe when I have more land I can fully test fire this barrel.

My paint scheme is military inspired, simply put. And there was a degree of attention to detail for aesthetics.

Also I am aware of my use of DWV street elbows for the transition from trigger to barrel. I feel the curved design gives an easier pressure transfer and adds a better aesthetic quality. This piece is not designed to hold pressure, it more or less directs it. If it should ever fail it can be replaced as it is a removeable piece.

ANY comments / Suggestions are welcome, this is my first pneumatic and the results are more than what I need. I realize there are much more powerful cannons out there, But I have no need or place to fire those!

Here is a shotty video taken from someone present during test fire
http://www.youtube.com/watch?v=mwcvtCejOHA

We are working on putting together a more complete, better quality video.

- Brian Woznuk, Lead Designer.