Interrupted Screw
Posted: Sat Jun 21, 2014 11:59 pm
Evenin folks
So I had a change of heart. I can't get my ignition to work in the shells I've been trying to get my howitzer to fire, so I'm giving up on using a precharged shell altogether. Now it's just a shell with a potato shoved up the chamber, and a screw on backing to my 4 inch chamber like every other spud gun in the world.
Here's somethin though. My door action won't be any good with a screw-in breech plug. SO, what about an interrupted screw?
Well, I decided to experiment, and came up with something that... worked but didn't work.
The mechanism worked. But, it did leak quite a bit. on this little tiny version, that wouldn't be a problem because I have a rubber gasket that solves the issue. My larger version doesn't have the shelf for a gasket, so shaving the threads would leave a pretty big gap.
So, lemme know what you think to these possible solutions:
-Leaving one thread at the end of the cap for a seal
-Screwing a plate to the back of the cap with a rubber gasket
-saying screw it... as in not use an interrupted screw because these parts were ten bucks and I'm a cheap SOB.
Oh, and I painted it. Here's the updated pics:
So I had a change of heart. I can't get my ignition to work in the shells I've been trying to get my howitzer to fire, so I'm giving up on using a precharged shell altogether. Now it's just a shell with a potato shoved up the chamber, and a screw on backing to my 4 inch chamber like every other spud gun in the world.
Here's somethin though. My door action won't be any good with a screw-in breech plug. SO, what about an interrupted screw?
Well, I decided to experiment, and came up with something that... worked but didn't work.
The mechanism worked. But, it did leak quite a bit. on this little tiny version, that wouldn't be a problem because I have a rubber gasket that solves the issue. My larger version doesn't have the shelf for a gasket, so shaving the threads would leave a pretty big gap.
So, lemme know what you think to these possible solutions:
-Leaving one thread at the end of the cap for a seal
-Screwing a plate to the back of the cap with a rubber gasket
-saying screw it... as in not use an interrupted screw because these parts were ten bucks and I'm a cheap SOB.
Oh, and I painted it. Here's the updated pics: