Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 72 users online :: 4 registered, 0 hidden and 68 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Interrupted screw breech.

A place to ask general spud cannon related questions.
Sponsored 
  • Author
    Message

Interrupted screw breech.

Unread postAuthor: Pyrodex » Mon Aug 25, 2014 12:25 am

Hallo,
I am new here so go easy on me :wink: . I was thinking about spud guns when it occurred to me that not many people use breech loading systems. However those who have used a breech loading system, did any of them use an interrupted screw breech like a welin or de bange breech? This is basically how it works:
  • 0

Attachments
image.jpg
User avatar
Pyrodex
Private
Private
 
Posts: 1
Joined: Mon Aug 25, 2014 12:04 am
Country: United States (us)
Reputation: 0

Re: Interrupted screw breech.

Unread postAuthor: Brian the brain » Mon Aug 25, 2014 11:56 am

Can't think of anyone going that route before..
I can't see what the advantages are over what we have tried so far either...but if you'd try it ..it would be interesting too see...
  • 0

Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
User avatar
Brian the brain
Moderator
Moderator
 
Posts: 3494
Joined: Mon Dec 05, 2005 2:06 am
Location: Holland
Country: Netherlands (nl)
Reputation: 29

Re: Interrupted screw breech.

Unread postAuthor: jrrdw » Mon Aug 25, 2014 5:27 pm

Brian the brain wrote:Can't think of anyone going that route before..
I can't see what the advantages are over what we have tried so far either...but if you'd try it ..it would be interesting too see...


I can. Enjoy! :bigsmurf:
  • 0

When life gives you lemons...throw them back they suck!
User avatar
jrrdw
Donating Moderator
Donating Moderator
 
Posts: 6538
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Country: United States (us)
Reputation: 25

Re: Interrupted screw breech.

Unread postAuthor: dart guy » Mon Oct 27, 2014 5:57 pm

Remember how I want to build that over kill pneumatic rifle? Well I am now debating how applicable it would be to air rifles, if used as a back bolt lock you could pretty much use that as is, but if doing a front lock, you would have to make a section that has an o ring infront of the threads that fits into the chamber, ( cartridge or not, chamber of some sort is needed) I got this idea from reading a rifle design book, ( want to be a part time gunsmith) but good luck if you attempt, it will bring us closer to some awesome bolt acton spud shooters
  • 0

when life gives you lemons... make root beer and leave the world wondering how you did that :D
User avatar
dart guy
Major
Major
 
Posts: 397
Joined: Mon May 13, 2013 7:54 pm
Location: not telling you
Reputation: 5

Re: Interrupted screw breech.

Unread postAuthor: D_Hall » Sat Nov 01, 2014 10:59 pm

dart guy wrote:if you attempt, it will bring us closer to some awesome bolt acton spud shooters

Not really. It will bring OP closer to some awesome bolt action spud shooters. The problem with such a breech isn't whether or not it will work. It will. Spectacularly. The problem is rather, who has the resources to make such a breech? Answer: Very few of us.
  • 0

Simulation geek (GGDT / HGDT) and designer of Vera.
User avatar
D_Hall
Donating Member
Donating Member
 
Posts: 1759
Joined: Thu Feb 07, 2008 7:37 pm
Location: SoCal
Reputation: 6

Re: Interrupted screw breech.

Unread postAuthor: wyz2285 » Sun Nov 02, 2014 6:41 am

D_Hall wrote:
dart guy wrote:if you attempt, it will bring us closer to some awesome bolt acton spud shooters

Not really. It will bring OP closer to some awesome bolt action spud shooters. The problem with such a breech isn't whether or not it will work. It will. Spectacularly. The problem is rather, who has the resources to make such a breech? Answer: Very few of us.

Well, one can always file the threads of a pair of fittings (I see a lot filing but I also see that would work just fine)... I'd use my mill though.
  • 0

CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

Re: Interrupted screw breech.

Unread postAuthor: mark.f » Sun Nov 02, 2014 7:28 am

Sealing is the deal here as well... I'm pretty sure most of you know how leaking combustion gases work around crisp, white PVC...

A smooth section with an o-ring could work well for that.
  • 0

User avatar
mark.f
Donating Member
Donating Member
 
Posts: 3464
Joined: Sat May 06, 2006 11:18 am
Country: United States (us)
Reputation: 21

Re: Interrupted screw breech.

Sponsored

Sponsor
 


Re: Interrupted screw breech.

Unread postAuthor: wyz2285 » Sun Nov 02, 2014 7:31 am

Just use bigger fittings than the bore and put a washer in the end, shouldn't be complicated if done right.
  • 0

CpTn_lAw wrote::D "yay, me wanna make big multishot pnoob with 1000 psi foot pump compressor using diamond as main material. Do you think wet bread make good sealant? " :D
User avatar
wyz2285
Major General
Major General
 
Posts: 2244
Joined: Sat Mar 06, 2010 7:50 am
Location: Porto, Portugal
Country: Portugal (pt)
Reputation: 12

Re: Interrupted screw breech.

Unread postAuthor: dart guy » Mon Nov 03, 2014 6:10 pm

I could see making one of those in reach for those with a drill press and a file or belt sander, if the screw in bolt is a peice of all thread just file away the thread where you don't want them and then get a nut and file away it's threads.( though to make it bolt action, the all thread will need some drilling to attach it to something like a copper pipe, drill a pilot hole with a diameter of like 1/4" drill bit and then it can be widened progressively.) this would probably work well if attached to some piping before the bolt screw. Also I think leaking is easily solved if done right, but I'm not sure of your design so I can't realy know how it will go from there.
  • 0

when life gives you lemons... make root beer and leave the world wondering how you did that :D
User avatar
dart guy
Major
Major
 
Posts: 397
Joined: Mon May 13, 2013 7:54 pm
Location: not telling you
Reputation: 5

Return to General Spud Cannon Related

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], Yahoo [Bot]

Reputation System ©'