Pump action Cartridge Potato Cannon
Posted: Fri Aug 09, 2013 10:12 pm
This is just my first prototype into this kind of idea. This cannon uses cartridges that are filled with whatever I want, and then clipped onto the side of the cannon. These cartridges are 4" long and 1.25" in diameter. The cannon itself is just a regular 2" piston valve cannon, that I have used for other demonstrations in the past, including the remote control golf ball cannon that I posted a week or two ago. The barrel is the only newly designed part.
It uses a 1.25" barrel sleeved inside of a 2" pipe. I found that if there is a coupling around the barrel, that it is a perfect fit inside of a 2" pipe. There are two slots cut out of the 2" pipe, one that allows a cartridge to be put in, and one that allows it to fall out. In the back of the pipe, I have a floating piece of 1.25" pipe with half of a modified coupling that grabs onto the cartridge. There is an o-ring inside of coupling that presses up against the cartridge to keep a full seal against the face. There are two springs attached to the floating catch, that keeps a steady 23 lbs of force on the back of the cartridge at all times.
The front part of the barrel, the part that is attached to the pump has the same kind of coupling design on it as well, except there are no springs, and the coupling is a little deeper, this is why the cartridge only sticks to the barrel, and not the rear catch.
There is an ejector built into the top of the 2" sleeve that catches on the ridge of the cartridge and dislodges it from the barrel, and drops it out of the sleeve.
A new cartridge is then loaded, the barrel comes back and pushes against the rear catch. The pump handle is then turned to lock the barrel from sliding forward.
I have a video here of the trial run of my first cartridge cannon
[youtube][/youtube]
Please feel free to offer suggestions, just refrain from pointing out the primer stains, I already know about them.
Feel free to ask any questions and I will do my best to answer them
It uses a 1.25" barrel sleeved inside of a 2" pipe. I found that if there is a coupling around the barrel, that it is a perfect fit inside of a 2" pipe. There are two slots cut out of the 2" pipe, one that allows a cartridge to be put in, and one that allows it to fall out. In the back of the pipe, I have a floating piece of 1.25" pipe with half of a modified coupling that grabs onto the cartridge. There is an o-ring inside of coupling that presses up against the cartridge to keep a full seal against the face. There are two springs attached to the floating catch, that keeps a steady 23 lbs of force on the back of the cartridge at all times.
The front part of the barrel, the part that is attached to the pump has the same kind of coupling design on it as well, except there are no springs, and the coupling is a little deeper, this is why the cartridge only sticks to the barrel, and not the rear catch.
There is an ejector built into the top of the 2" sleeve that catches on the ridge of the cartridge and dislodges it from the barrel, and drops it out of the sleeve.
A new cartridge is then loaded, the barrel comes back and pushes against the rear catch. The pump handle is then turned to lock the barrel from sliding forward.
I have a video here of the trial run of my first cartridge cannon
[youtube][/youtube]
Please feel free to offer suggestions, just refrain from pointing out the primer stains, I already know about them.
Feel free to ask any questions and I will do my best to answer them