[modeleng] Re: new website
- From: "Tony Wells" <oaksfield@xxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Thu, 22 Nov 2007 16:17:07 -0000
I have a Southbend Colonial field cannon at 1:10 scale, in cast iron with a
stainless steel liner, and it weighs a lot less than 17lbs! It still have a
.600" bore though, so that I find 20-guage shotgun solid ball and wads
"would be" ideal ..... but I didn't say that! <VBG> 70 grains of black
powder goes well in a .577" Enfield musket, and so should be about right for
this cannon of mine. Weight for weight, for similar recoil, a charge of
120 - 140 grains would be about right for a 17lb barrel, so about an inch
bore perhaps?
I would stay away from shotgun cartridges though, as they have different
impulse / pressure curves due to their nitrocelluse based smokeless powders,
unless you use a steel liner, which then becomes the barrel and chamber with
the brass tubing just there for show ....
Tony.
----- Original Message -----
From: "Chris Crosskey" <chris.crosskey@xxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Thursday, November 22, 2007 2:17 PM
Subject: [modeleng] Re: new website
> About a 1:4 scale model, ie 3inch to the foot... still a handy enough
> caliber I'd have thought.... A 12 pounder is about a 72mm barrel bore
> (rough estimate seeing as a 6-pounder is 57mm), which brings a model in
> at around 18mm, so you'd be able to run shotgun cartridges in it, if you
> derate the cartidges a bit (lets face it a flash, a bang and something
> flies out of the end and hits a target 30 feet away is plenty from that
> sort of thing surely) you should have no trouble... My dad's favourite
> shotgun weighed less than six pounds so 17 lbs of brass should be able
> to handle a half charge without any trouble at all.....
> Chrisc
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