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 78 users online :: 4 registered, 0 hidden and 74 guests


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

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

Gatling gun

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

Gatling gun

Unread postAuthor: stuffbuilder » Wed Aug 31, 2011 11:13 pm

I had an idea for a rapid-fire Gatling gun. It would need a sealed rotating joint and a check valve for each chamber/barrel assembly (there would be a chamber for each barrel). In all there would probably be 6 separate barrels/chambers, each electronically controlled. One of the biggest problems would be the cost. A single 1/2 inch rotating fitting costs well over $100 on McMaster, and all those solenoids would definitely add up. Another big problem would be finding a compressor big enough to supply the thing with enough air to charge all 6 chambers. I'm sure even a 1 inch gun would need a huge amount of air.
  • 0

User avatar
stuffbuilder
Sergeant
Sergeant
 
Posts: 80
Joined: Tue Aug 30, 2011 8:56 pm
Reputation: 1

Unread postAuthor: Mr.Tallahassee » Wed Aug 31, 2011 11:16 pm

I believe this would be something to post in the pneumatic discussion, not here. If that is the case for sure, Mods, please move.
  • 0

User avatar
Mr.Tallahassee
Major
Major
 
Posts: 364
Joined: Sun Jul 10, 2011 2:35 am
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Wed Aug 31, 2011 11:28 pm

Image
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: Technician1002 » Thu Sep 01, 2011 12:32 am

Depending on your needs a rotating joint does not need to be expensive.
Google air hose swivel connector. Top hits are under $10.
Image
  • 0

User avatar
Technician1002
Chief of Staff
Chief of Staff
 
Posts: 5190
Joined: Sat Apr 04, 2009 11:10 am
Reputation: 14

Unread postAuthor: stuffbuilder » Thu Sep 01, 2011 9:48 am

I'm new here, and as of now this thing is purely hypothetical. It probably won't be build, at least not for a couple of years.

As for the swivel joint: the difference between that and a rotating joint is that a rotating joint is designed for continuous rotation while most of those swivel joints may only turn 360 degrees before being stopped.
  • 0

User avatar
stuffbuilder
Sergeant
Sergeant
 
Posts: 80
Joined: Tue Aug 30, 2011 8:56 pm
Reputation: 1

Re: Gatling gun

Unread postAuthor: velocity3x » Thu Sep 01, 2011 10:23 am

stuffbuilder wrote: One of the biggest problems would be the cost.


I can assure you that there are much BIGGER problems such as design, engineering and manufacturing.... just to name a few.
  • 0

User avatar
velocity3x
Brigadier General
Brigadier General
 
Posts: 827
Joined: Fri Jun 05, 2009 3:09 pm
Location: Yuma, Arizona
Country: United States (us)
Reputation: 7

Unread postAuthor: Goats spudz » Thu Sep 01, 2011 10:52 am

these swivel ! Image
  • 0


Goats spudz
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 458
Joined: Tue Aug 02, 2011 12:31 pm
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: dewey-1 » Thu Sep 01, 2011 11:02 am

Goats spudz wrote:these swivel !


They also leak like sieve and pop off unless you use a hose clamp!
  • 0

User avatar
dewey-1
Major General
Major General
 
Posts: 1298
Joined: Wed Mar 28, 2007 10:24 am
Location: NE Wisconsin USA
Reputation: 0

Unread postAuthor: Goats spudz » Thu Sep 01, 2011 11:49 am

if you use a small airline pipe it wont leak and will swivel, you have to heat the pipe in boiling water the pipe to get it on http://www.airlines-pneumatics.co.uk/webcat/Detprod.asp?ProductCode=S08000105
  • 0


Goats spudz
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 458
Joined: Tue Aug 02, 2011 12:31 pm
Reputation: 0

Unread postAuthor: stuffbuilder » Thu Sep 01, 2011 11:53 am

there are much BIGGER problems such as design, engineering and manufacturing

I've got most of the design/engineering worked out. The problem with that design is that it requires expensive parts like a continuous rotating joint and multiple solenoids. And by "requires" I mean I can't find an acceptable alternative. I don't have any sketches but I can make some and post them here. I'm not sure of your definition of "manufacturing," but mine is along the lines of inexpensive production of a lot of an item. This gun, as with most spud guns, would be built in a garage with with a minimal amount of tools and custom parts.
  • 0

User avatar
stuffbuilder
Sergeant
Sergeant
 
Posts: 80
Joined: Tue Aug 30, 2011 8:56 pm
Reputation: 1

Unread postAuthor: dewey-1 » Thu Sep 01, 2011 12:48 pm

Here is a true rotary union representation, for those that may not understand.
  • 0

Attachments
68996187gif_00000044846.jpg
68996187gif_00000044846.jpg (7.54 KiB) Viewed 1401 times
User avatar
dewey-1
Major General
Major General
 
Posts: 1298
Joined: Wed Mar 28, 2007 10:24 am
Location: NE Wisconsin USA
Reputation: 0

Unread postAuthor: velocity3x » Thu Sep 01, 2011 2:26 pm

stuffbuilder wrote:This gun, as with most spud guns, would be built in a garage with with a minimal amount of tools and custom parts.


Well.... At times I do overcomplicate things. :lol:
  • 0

User avatar
velocity3x
Brigadier General
Brigadier General
 
Posts: 827
Joined: Fri Jun 05, 2009 3:09 pm
Location: Yuma, Arizona
Country: United States (us)
Reputation: 7

Unread postAuthor: jimmy101 » Thu Sep 01, 2011 3:55 pm

Dewey's solution looks promising. Tech's has the problem that though the fitting is designed to swivel it probably isn't designed to do thousands of full rotations, which presumably a Gatling gun design would require.

Perhaps use a mod of Dewey's and Tech's suggestion: just use a compressed air quick connect.
Image
(from Harbor Freight)

These will spin (but not really swivel), they are cheap, and if after a couple thousand revolutions they start to wear you can just replace them for a couple bucks.
  • 0

Image

jimmy101
Lieutenant General
Lieutenant General
 
Posts: 3127
Joined: Wed Mar 28, 2007 9:48 am
Location: Greenwood, Indiana
Country: United States (us)
Reputation: 7

Unread postAuthor: stuffbuilder » Thu Sep 01, 2011 4:26 pm

I thought about just letting a quick connect rotate, but nearly every time I've seen them rotate I've heard air leak out. With something like this that requires a huge amount of air, I want the connection to be as efficient as possible.
  • 0

User avatar
stuffbuilder
Sergeant
Sergeant
 
Posts: 80
Joined: Tue Aug 30, 2011 8:56 pm
Reputation: 1

Unread postAuthor: dewey-1 » Thu Sep 01, 2011 4:26 pm

Jimmy;
You beat me to it!

I was going to suggest the same thing as a "pseudo-rotating coupler".

Put some grease on the male coupler detent and probably good to go!
  • 0

User avatar
dewey-1
Major General
Major General
 
Posts: 1298
Joined: Wed Mar 28, 2007 10:24 am
Location: NE Wisconsin USA
Reputation: 0

Next

Return to General Spud Cannon Related

Who is online

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

cron
Reputation System ©'