Buddy of mine wants to build a cannon - Page 3
Firearm & Gun Forum - FireArmsTalk.com > General Firearms Forums > Blackpowder & Musket > Buddy of mine wants to build a cannon

Reply
 
LinkBack Thread Tools Display Modes
Old 07-22-2012, 12:33 PM   #21
Feedback Score: 0 reviews
 
Hawg's Avatar
 
Join Date: Jan 2009
Location: Heidelberg,MS
Posts: 1,409
Liked 79 Times on 54 Posts
Likes Given: 29

Default

I've been thinking about that. I've got a bunch of oxygen and acetylene bottles I can't do anything with.

__________________

DEO VINDICE

http://blackpowdertimes.com/index.php

Hawg is offline  
 
Reply With Quote
Old 07-22-2012, 01:16 PM   #22
Moderator
FTF_MODERATOR.png
Feedback Score: 0 reviews
 
c3shooter's Avatar
 
Join Date: Feb 2008
Location: Third bunker on the right,Central Virginia
Posts: 16,897
Liked 9141 Times on 3948 Posts
Likes Given: 1426

Default

Oxygen, yes- acetylene, NO.

Oxy tanks are high pressure. Acetylene tanks are low pressure and they are not hollow- they are filled with a porous material soaked in liquid acetone.

__________________

What we have here is... failure- to communicate.

c3shooter is online now  
 
Reply With Quote
Old 07-22-2012, 07:18 PM   #23
Feedback Score: 0 reviews
 
Hawg's Avatar
 
Join Date: Jan 2009
Location: Heidelberg,MS
Posts: 1,409
Liked 79 Times on 54 Posts
Likes Given: 29

Default

Quote:
Originally Posted by c3shooter View Post
acetylene, NO.

they are filled with a porous material soaked in liquid acetone.

I've used that stuff for many, many years and I never knew that. I do want to build a canon but not that big. Old bowling balls would be too hard to find around here.
__________________

DEO VINDICE

http://blackpowdertimes.com/index.php

Hawg is offline  
 
Reply With Quote
Old 11-09-2012, 12:02 AM   #24
Feedback Score: 0 reviews
 
alinkrod's Avatar
 
Join Date: Nov 2012
Posts: 8
Default

Ok guy's and gals I'm new here most of what has been said is true to fact... I build cannon and mortars all the time. I start with 4140 sch 180 SEAM-LESS TUBING. DO NOT USE ANY KIND OF PIPE!!! Tubing ONLY. I spent over a year researching the ways and materials to do this safely. The sch 180 tubing is rated at 7200 PSI working pressure, Not burst pressure. As to the welding of the chamber plug, Certed high pressure welder REQUIRED! Remember the first time you fire this it is a BOMB! NOT a cannon. Most of what I build is 1.75"(golf ball or 1lb lead ball), 2.75"(pop can, tennis ball, 4lb lead ball), 3"(baseball, 5lb lead ball). The national black powder cannon association recommends only using 1F powder and max load of 2oz per inch of bore dia. The old armorers proofed the barrels with 1 load = to 4x max powder charge and 2x ball weight. For the pop can size the proof load equates to (5.5oz of 1f=max load) x 4= 22oz 1F and 8lb ball weight (2x the ball weight). After doing the math and conversions, I use 8oz of FFFF and a pop can filled with 11lb's of lead ruffly. You also have to understand I spent 6 yrs in the US Army as a Explosive Ordnance Disposal Tech, If you don't know what that is(lol) watch the "Hurt Locker", I'm the DA in the Pillsbury suit with no gloves... It REALLY WAS A LOT OF FUN AT THE TIME! Not now... When I do the proof shot, the barrel is contained in ravine bagged heavy with sand bags and about 3 foot of fuse. So far 30 built - 0 fails. Barrels are turned and weld checked before and after. This is not a project to start without a lot of thought and prep. To give you an example of one of my toy's look below. This is a 2.75" mortar I build and use all the time. It will throw a pop can full of concrete about 1.5 miles at max elevation and powder charge. Be careful, BE SAFE. WHEN IN DOUBT, DON"T SHOOT IT!!! Rod

img_0094.jpg  
__________________
alinkrod is offline  
 
Reply With Quote
Old 11-09-2012, 04:51 AM   #25
Feedback Score: 0 reviews
 
Join Date: Feb 2010
Posts: 446
Liked 112 Times on 71 Posts

Default

NEVER compress a powder charge with a hammer or mallet! The charge can spontaneously explode, and it offers no advantage over firmly compressing the charge.

__________________
BillDeShivs is offline  
 
Reply With Quote
Old 11-09-2012, 11:44 PM   #26
Feedback Score: 0 reviews
 
Scratchammo's Avatar
 
Join Date: Sep 2010
Location: Memphis,The volunteer state
Posts: 1,471
Liked 24 Times on 18 Posts
Likes Given: 160

Default

Quote:
Originally Posted by alinkrod View Post
Ok guy's and gals I'm new here most of what has been said is true to fact... I build cannon and mortars all the time. I start with 4140 sch 180 SEAM-LESS TUBING. DO NOT USE ANY KIND OF PIPE!!! Tubing ONLY. I spent over a year researching the ways and materials to do this safely. The sch 180 tubing is rated at 7200 PSI working pressure, Not burst pressure. As to the welding of the chamber plug, Certed high pressure welder REQUIRED! Remember the first time you fire this it is a BOMB! NOT a cannon. Most of what I build is 1.75"(golf ball or 1lb lead ball), 2.75"(pop can, tennis ball, 4lb lead ball), 3"(baseball, 5lb lead ball). The national black powder cannon association recommends only using 1F powder and max load of 2oz per inch of bore dia. The old armorers proofed the barrels with 1 load = to 4x max powder charge and 2x ball weight. For the pop can size the proof load equates to (5.5oz of 1f=max load) x 4= 22oz 1F and 8lb ball weight (2x the ball weight). After doing the math and conversions, I use 8oz of FFFF and a pop can filled with 11lb's of lead ruffly. You also have to understand I spent 6 yrs in the US Army as a Explosive Ordnance Disposal Tech, If you don't know what that is(lol) watch the "Hurt Locker", I'm the DA in the Pillsbury suit with no gloves... It REALLY WAS A LOT OF FUN AT THE TIME! Not now... When I do the proof shot, the barrel is contained in ravine bagged heavy with sand bags and about 3 foot of fuse. So far 30 built - 0 fails. Barrels are turned and weld checked before and after. This is not a project to start without a lot of thought and prep. To give you an example of one of my toy's look below. This is a 2.75" mortar I build and use all the time. It will throw a pop can full of concrete about 1.5 miles at max elevation and powder charge. Be careful, BE SAFE. WHEN IN DOUBT, DON"T SHOOT IT!!! Rod
Freakin' awesome cannon!!
__________________

"THE SIERRA JUST HOTEL TANGO FOXTROT -OVER"

MALO PERICULOSAM LIBERTATEM QUAM QUIETUM SERVITIUM

Scratchammo is offline  
 
Reply With Quote
Old 11-10-2012, 04:25 AM   #27
Feedback Score: 0 reviews
 
primer1's Avatar
 
Join Date: Feb 2012
Posts: 6,521
Liked 2493 Times on 1620 Posts

Default

Are those hollowpoint pop cans?

A freaking mile and a half? Holy cola bullets, Batman! That looks like a lot of fun. It would be a good way to spend veterans day, fourth of July, new years, etc.

__________________

Feral cat waterboarder

primer1 is offline  
 
Reply With Quote
Old 11-10-2012, 03:27 PM   #28
Feedback Score: 0 reviews
 
alinkrod's Avatar
 
Join Date: Nov 2012
Posts: 8
Default

Quote:
Originally Posted by Scratchammo

Freakin' awesome cannon!!
Well your close, but no cigar! Lol it is my rendishin of a cw cohorn mortar. Barrel weighs 67 lb's by it's self. And yes it does roar when fired!
__________________
alinkrod is offline  
 
Reply With Quote
Old 11-10-2012, 03:31 PM   #29
Feedback Score: 0 reviews
 
alinkrod's Avatar
 
Join Date: Nov 2012
Posts: 8
Default

Quote:
Originally Posted by BillDeShivs
NEVER compress a powder charge with a hammer or mallet! The charge can spontaneously explode, and it offers no advantage over firmly compressing the charge.
Along with what Bill says, your ramrod should be hardwood and slick rod on top, no nobs by hand. NEVER!!!! Place any part of you over the muzzle while loading!!!!!
__________________
alinkrod is offline  
 
Reply With Quote
Old 11-10-2012, 03:37 PM   #30
Feedback Score: 0 reviews
 
alinkrod's Avatar
 
Join Date: Nov 2012
Posts: 8
Default

Here is a pic of a shot of a 4lb lead ball from 50 yrds out, shot horz instead of mortar style. Mortar flipped back about 30 Ft.

image-2515282974.jpg

2nd shot is the one in the center

__________________
alinkrod is offline  
 
Reply With Quote
Reply

Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Firearms Forum Replies Last Post
cannon slim325 NFA/Class 3 & FFL Discussion 6 02-22-2012 02:51 PM
Range buddy? PowerViolence Range Report 0 10-11-2011 07:15 PM
Hunting Buddy ! 303tom Hunting Forum 2 09-04-2011 12:03 PM
Lloyd and the buddy gun sarge_257 Training & Safety 2 11-30-2010 10:36 AM
Benning Boy.....this is for you buddy! IGETEVEN The Club House 10 07-24-2009 02:11 PM