It survived an is now proofed to 1lb BP and 1lbShot
If you guys know what your doing then fine. If not then...
'Proofed'? Sounds a little hasty to me ohnhai. 'Survive' is a relative term. The blast could have been such so as to damage the metal and introduce micro cracks (on the inside of the bore) which would, through metal fatique(caused by further less powerful shots), propagate until some subsequent blast resulted in catastrophic failure. And fatique is not necessarily a slow moving process.
The blast also 'works' the metal causing it to harden (try bending a wire coat hanger back and forth a few times. It gets progressively stiffer and harder to bend - then it snaps like a pretzel)
If some gun barrel engineer designed this then you should be fine. If its a piece of steel pipe salvaged from a scrap yard then when re-enacting civil war battles, chose the positions the enemy would be in as your observation point before firing this thing
Just warning for want of knowing what the background engineering is. No offence.
This message has been edited by iano, 26-Apr-2006 10:19 AM
It’s a real cannon barrel made to order, cast solid and machined out with precision, by those whose job it is to make such things.
And the term ‘Proofed’ is used within the terminology of UK legal gun certification and such like. That footage was not of someone testing a homemade device, but of a legally required and recorded part of making a new gun. Being cannon they kinda demand more space than your average proofing house, thus the field J
It will have been thoroughly checked out before and after the ‘Proofing shot’, which is normally twice the designed load and yet still within what the barrel should theoretically take. Yet if there was a flaw in the barrel the proofing shot is most likely to find it (BOOM) The guns are also monitored often through their life and in fact the old barrel was de-activated precisely because doubt was cast over its continued integrity.
The uk re-enactment scene do take the safety and regulation of the firearms used in their events very seriously and my Dad also being one of the inspectors of artillery for the Sealed Knot has to take it even more seriously.
Logically, the end needs to be held off the ground, so not to give false strength to that side of the barrel in contact with the ground, and yet when fired the muzzle tries to push itself down (lifting the rear of the barrel as you can see) Combined with the backward motion this downward force on the sleeper pings it up much like and oversized tiddly-wink. Moreover, pinging a lump of wood that big, that high should give a clearer idea of the shear amount of energy involved in that shot…
CBE: Changes the opening word from 'Aparently' to "Logically"
This message has been edited by ohnhai, 27-04-2006 02:05 PM