My grandson was in a museum gift shop and spotted some " Big Bang "
cannons. The cannons that use carbide to produce acetylene. The
price was not on the merchandize so he took one of the smallest to the
clerk to find out the price. And he and I were both surprised when
the price turned out to be $108.xx. He decided that was way too much
money.

I thought I would make him a brass cannon for Christmas. So today I
went to the local scrap yard and got some brass. _And this evening
found a drawing on the internet of a 6 lb bronze field gun that I can
scale to a size to fit the brass I bought. And I think I am good to
go. But thought I would ask if anyone has some suggestions. I am
curious how other people have dealt with the trunions. I am inclined
to make them as separate parts and silver braze them on.


Dan

" fired this volley in news:69e472b1-
:

I am inclined
to make them as separate parts and silver braze them on.


I probably would, too, but would bore sides of the barrel with shallow
pockets, just to ensure they don't show visible seams.

Lloyd

Brass isn't strong like Bronze is. Bronze is like a steel.
Think and be careful.

Martin

On 11/30/2011 7:40 PM, wrote:
My grandson was in a museum gift shop and spotted some " Big Bang "
cannons. The cannons that use carbide to produce acetylene. The
price was not on the merchandize so he took one of the smallest to the
clerk to find out the price. And he and I were both surprised when
the price turned out to be $108.xx. He decided that was way too much
money.

I thought I would make him a brass cannon for Christmas. So today I
went to the local scrap yard and got some brass. _And this evening
found a drawing on the internet of a 6 lb bronze field gun that I can
scale to a size to fit the brass I bought. And I think I am good to
go. But thought I would ask if anyone has some suggestions. I am
curious how other people have dealt with the trunions. I am inclined
to make them as separate parts and silver braze them on.


Dan

Martin Eastburn wrote:
Brass isn't strong like Bronze is. Bronze is like a steel.
Think and be careful.

Martin

On 11/30/2011 7:40 PM, wrote:
My grandson was in a museum gift shop and spotted some " Big Bang "
cannons. The cannons that use carbide to produce acetylene. The
price was not on the merchandize so he took one of the smallest to the
clerk to find out the price. And he and I were both surprised when
the price turned out to be $108.xx. He decided that was way too much
money.

I thought I would make him a brass cannon for Christmas. So today I
went to the local scrap yard and got some brass. _And this evening
found a drawing on the internet of a 6 lb bronze field gun that I can
scale to a size to fit the brass I bought. And I think I am good to
go. But thought I would ask if anyone has some suggestions. I am
curious how other people have dealt with the trunions. I am inclined
to make them as separate parts and silver braze them on.


Dan

Will this be a functional item? If so then the easiest way to make it
safe and would be to line the bore with a steel sleeve.
Trunions could then be done very solid. Basically you would finish the
exterior. Drill through the cannon, silver braze in the trunion shaft
then bore the cannon barrel bore, Machine a sleeve and silver braze that
in as well. With the steel you could also make a breech plug and attach
it to the sleeve as well.

--
Steve W.

On Thu, 01 Dec 2011 00:47:38 -0500, "Steve W."
wrote:

Martin Eastburn wrote:
Brass isn't strong like Bronze is. Bronze is like a steel.
Think and be careful.

Martin

On 11/30/2011 7:40 PM, wrote:
My grandson was in a museum gift shop and spotted some " Big Bang "
cannons. The cannons that use carbide to produce acetylene. The
price was not on the merchandize so he took one of the smallest to the
clerk to find out the price. And he and I were both surprised when
the price turned out to be $108.xx. He decided that was way too much
money.

I thought I would make him a brass cannon for Christmas. So today I
went to the local scrap yard and got some brass. _And this evening
found a drawing on the internet of a 6 lb bronze field gun that I can
scale to a size to fit the brass I bought. And I think I am good to
go. But thought I would ask if anyone has some suggestions. I am
curious how other people have dealt with the trunions. I am inclined
to make them as separate parts and silver braze them on.


Dan

Will this be a functional item? If so then the easiest way to make it
safe and would be to line the bore with a steel sleeve.
Trunions could then be done very solid. Basically you would finish the
exterior. Drill through the cannon, silver braze in the trunion shaft
then bore the cannon barrel bore, Machine a sleeve and silver braze that
in as well. With the steel you could also make a breech plug and attach
it to the sleeve as well.

For a Carbide Cannon..Id doubt he would need a sleeve. Just walls more
than 1/4" thick in brass.

Steel carbide cannons had mild steel bodies and wall thicknesses of
around .125 or so.
A lot of them were simply die stamped sheet metal and two halves crimped
together though most were simply cast iron and not very damned thick.

http://www.ebay.com/sch/i.html?_from...All-Categories

If you look at the wall thickness of this one...

http://www.ebay.com/itm/Conestoga-Co...-/150709532470


On the other hand..Ive seen a few blow up..but..stuffing a payload down
the bore was NOT recommended in the first place

Gunner

One could not be a successful Leftwinger without realizing that,
in contrast to the popular conception supported by newspapers
and mothers of Leftwingers, a goodly number of Leftwingers are
not only narrow-minded and dull, but also just stupid.
Gunner Asch

In article ,
"Steve W." wrote:

Martin Eastburn wrote:
Brass isn't strong like Bronze is. Bronze is like a steel.
Think and be careful.

Martin

On 11/30/2011 7:40 PM, wrote:
My grandson was in a museum gift shop and spotted some " Big Bang "
cannons. The cannons that use carbide to produce acetylene. The
price was not on the merchandize so he took one of the smallest to the
clerk to find out the price. And he and I were both surprised when
the price turned out to be $108.xx. He decided that was way too much
money.

I thought I would make him a brass cannon for Christmas. So today I
went to the local scrap yard and got some brass. _And this evening
found a drawing on the internet of a 6 lb bronze field gun that I can
scale to a size to fit the brass I bought. And I think I am good to
go. But thought I would ask if anyone has some suggestions. I am
curious how other people have dealt with the trunions. I am inclined
to make them as separate parts and silver braze them on.


Dan

Will this be a functional item? If so then the easiest way to make it
safe and would be to line the bore with a steel sleeve.
Trunions could then be done very solid. Basically you would finish the
exterior. Drill through the cannon, silver braze in the trunion shaft
then bore the cannon barrel bore, Machine a sleeve and silver braze that
in as well. With the steel you could also make a breech plug and attach
it to the sleeve as well.

I don't think I would silver-solder a long steel tube to a long brass
tube. The thermal coefficients are too different, and the thing will
tear itself apart. What would work would be to thread the parts at one
end and screw them together. But the steel tube must be able to move
lengthwise.

Joe Gwinn

In article , says...

Martin Eastburn wrote:
Brass isn't strong like Bronze is. Bronze is like a steel.
Think and be careful.

Martin

On 11/30/2011 7:40 PM, wrote:
My grandson was in a museum gift shop and spotted some " Big Bang "
cannons. The cannons that use carbide to produce acetylene. The
price was not on the merchandize so he took one of the smallest to the
clerk to find out the price. And he and I were both surprised when
the price turned out to be $108.xx. He decided that was way too much
money.

I thought I would make him a brass cannon for Christmas. So today I
went to the local scrap yard and got some brass. _And this evening
found a drawing on the internet of a 6 lb bronze field gun that I can
scale to a size to fit the brass I bought. And I think I am good to
go. But thought I would ask if anyone has some suggestions. I am
curious how other people have dealt with the trunions. I am inclined
to make them as separate parts and silver braze them on.


Dan

Will this be a functional item? If so then the easiest way to make it
safe and would be to line the bore with a steel sleeve.
Trunions could then be done very solid. Basically you would finish the
exterior. Drill through the cannon, silver braze in the trunion shaft
then bore the cannon barrel bore, Machine a sleeve and silver braze that
in as well. With the steel you could also make a breech plug and attach
it to the sleeve as well.

If he's talking a carbide cannon the original manufacturer made some out
of glass to show the safety of the design, and there's one on youtube
made out of PVC pipe that has clearly been fired many times. Brass
should be completely adequate. A carbide cannon makes a noise, it
doesn't fire a projectile.

On Fri, 2 Dec 2011 10:00:16 -0500, "J. Clarke"
wrote:



Will this be a functional item? If so then the easiest way to make it
safe and would be to line the bore with a steel sleeve.
Trunions could then be done very solid. Basically you would finish the
exterior. Drill through the cannon, silver braze in the trunion shaft
then bore the cannon barrel bore, Machine a sleeve and silver braze that
in as well. With the steel you could also make a breech plug and attach
it to the sleeve as well.

If he's talking a carbide cannon the original manufacturer made some out
of glass to show the safety of the design, and there's one on youtube
made out of PVC pipe that has clearly been fired many times. Brass
should be completely adequate. A carbide cannon makes a noise, it
doesn't fire a projectile.


Just out of interest: If this were a functional item, made of brass,
designed for black powder and firing projectiles, is there a formula
relating the thickness of the barrel wall to the bore diameter? Does
LaPlace's law apply here?

Michael Koblic,
Campbell River, BC

wrote:
On Fri, 2 Dec 2011 10:00:16 -0500, "J. Clarke"
wrote:


Will this be a functional item? If so then the easiest way to make it
safe and would be to line the bore with a steel sleeve.
Trunions could then be done very solid. Basically you would finish the
exterior. Drill through the cannon, silver braze in the trunion shaft
then bore the cannon barrel bore, Machine a sleeve and silver braze that
in as well. With the steel you could also make a breech plug and attach
it to the sleeve as well.
If he's talking a carbide cannon the original manufacturer made some out
of glass to show the safety of the design, and there's one on youtube
made out of PVC pipe that has clearly been fired many times. Brass
should be completely adequate. A carbide cannon makes a noise, it
doesn't fire a projectile.


Just out of interest: If this were a functional item, made of brass,
designed for black powder and firing projectiles, is there a formula
relating the thickness of the barrel wall to the bore diameter? Does
LaPlace's law apply here?

Michael Koblic,
Campbell River, BC

http://www.muzzleloadingforum.com/fu...hp?tid/255371/
http://greystarcannontech.homestead.com/star.html
http://www.go2gbo.com/forums/index.p...c,41634.0.html

--
Steve W.

On 2011-12-03, wrote:
On Fri, 2 Dec 2011 10:00:16 -0500, "J. Clarke"
wrote:



Will this be a functional item? If so then the easiest way to make it
safe and would be to line the bore with a steel sleeve.

[ ... ]

Just out of interest: If this were a functional item, made of brass,
designed for black powder and firing projectiles, is there a formula
relating the thickness of the barrel wall to the bore diameter? Does
LaPlace's law apply here?

Given that *real* cannons were not made of brass -- they were
made of bronze, which is similar in appearance, depending on state of
patina buildup.

I personally would never consider putting black powder in
anything made of brass. Stick with bronze -- it is much stronger and
safer.

Enjoy,
DoN.

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