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 64 users online :: 4 registered, 0 hidden and 60 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

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

The Team
Administrators
Global Moderators
global_moderators.png CS

What cannon parts should I machine?

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

What cannon parts should I machine?

Unread postAuthor: Dave_424 » Tue Sep 15, 2009 4:49 pm

Hey guys, recieved my lathe a while ago and am not sure what I want to build from some scrap metal I have.

I have about 8 inches of 1 1/3" brass bar and don't really want to waste it on making smaller parts.

I was thinking about making a really high mix hybrid. Having about 10mm walls.

What mix roughly (I know it is very hard to guess) would be achieveable?

Dave
  • 0


Dave_424
2nd Lieutenant
2nd Lieutenant
 
Posts: 220
Joined: Thu Aug 02, 2007 7:45 am
Reputation: 0

Unread postAuthor: Moonbogg » Tue Sep 15, 2009 5:02 pm

Totally dependant on the alloy. Which alloy is it?

EDIT: Brass is simply not brass, just like a bolt isn't just a bolt.
  • 0

User avatar
Moonbogg
Major General
Major General
 
Posts: 1375
Joined: Mon Oct 13, 2008 10:20 pm
Location: whittier, CA USA
Reputation: 0

Unread postAuthor: Dave_424 » Tue Sep 15, 2009 5:06 pm

no idea to be honest, just use the weakest alloy and ill see if I like the mix number
  • 0


Dave_424
2nd Lieutenant
2nd Lieutenant
 
Posts: 220
Joined: Thu Aug 02, 2007 7:45 am
Reputation: 0

Unread postAuthor: Moonbogg » Tue Sep 15, 2009 5:22 pm

A quick stress analysis based on a common brass yield strength of 37kpsi, the safety factor on 1,000psi is 15. On 3,000psi its 5. This doesn't take into account any form of end caps you may use, its only the strength of the tube itself. Based on this quick study I would go for 15-20x. Drill a single hole in the chamber anywhere and your safety factor drops by about HALF!
  • 0

User avatar
Moonbogg
Major General
Major General
 
Posts: 1375
Joined: Mon Oct 13, 2008 10:20 pm
Location: whittier, CA USA
Reputation: 0

Unread postAuthor: Dave_424 » Tue Sep 15, 2009 5:35 pm

Okay then, Not really sure what to do then.

What do you suggest I make from this and other scrap pieces?

Dave
  • 0


Dave_424
2nd Lieutenant
2nd Lieutenant
 
Posts: 220
Joined: Thu Aug 02, 2007 7:45 am
Reputation: 0

Unread postAuthor: psycix » Wed Sep 16, 2009 4:56 am

If you would drill a hole in the side (at the back of the chamber), simply use a smaller inner diameter there.
  • 0

Till the day I'm dieing, I'll keep them spuddies flying, 'cause I can!

Spudfiles steam group, join!
User avatar
psycix
Donating Member
Donating Member
 
Posts: 3684
Joined: Mon Jun 25, 2007 7:12 am
Location: The Netherlands
Reputation: 0

Return to General Spud Cannon Related

Who is online

Registered users: Bing [Bot], Google [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'