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Author Topic:   My Dad's New Cannon :)
ohnhai
Member (Idle past 3335 days)
Posts: 649
From: Melbourne, Australia
Joined: 11-17-2004


Message 1 of 7 (306611)
04-25-2006 11:42 PM


BOOM

THis is footage of the new barrel's proofing shot. (2lb of black powder and 1.3lb of shot :) )

It survived an is now proofed to 1lb BP and 1lbShot

neat.

To answer the obvious questions..
The barrel flies back into the grass, the thing that flies up in the air is is the Railway Sleeper it was sitting on.

As to WHY my Dad has this... Well He re-enacts english civil war battles.

A cool toy indeed

This message has been edited by ohnhai, 26-04-2006 02:42 PM


Replies to this message:
 Message 2 by iano, posted 04-26-2006 4:53 AM ohnhai has responded

    
iano
Member (Idle past 114 days)
Posts: 6165
From: Co. Wicklow, Ireland.
Joined: 07-27-2005


Message 2 of 7 (306633)
04-26-2006 4:53 AM
Reply to: Message 1 by ohnhai
04-25-2006 11:42 PM


Big Bang
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


This message is a reply to:
 Message 1 by ohnhai, posted 04-25-2006 11:42 PM ohnhai has responded

Replies to this message:
 Message 3 by ohnhai, posted 04-26-2006 11:59 AM iano has responded

  
ohnhai
Member (Idle past 3335 days)
Posts: 649
From: Melbourne, Australia
Joined: 11-17-2004


Message 3 of 7 (306707)
04-26-2006 11:59 AM
Reply to: Message 2 by iano
04-26-2006 4:53 AM


Re: Big Bang
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.

But thank you (in all sincerity) for the concern.


This message is a reply to:
 Message 2 by iano, posted 04-26-2006 4:53 AM iano has responded

Replies to this message:
 Message 4 by jar, posted 04-26-2006 12:05 PM ohnhai has responded
 Message 6 by iano, posted 04-26-2006 6:31 PM ohnhai has responded

    
jar
Member
Posts: 30997
From: Texas!!
Joined: 04-20-2004
Member Rating: 4.2


Message 4 of 7 (306709)
04-26-2006 12:05 PM
Reply to: Message 3 by ohnhai
04-26-2006 11:59 AM


Proof is not in the pudding.
Here is a link to some info on the UK proofing methods and standards.


Aslan is not a Tame Lion
This message is a reply to:
 Message 3 by ohnhai, posted 04-26-2006 11:59 AM ohnhai has responded

Replies to this message:
 Message 5 by ohnhai, posted 04-26-2006 12:32 PM jar has not yet responded

  
ohnhai
Member (Idle past 3335 days)
Posts: 649
From: Melbourne, Australia
Joined: 11-17-2004


Message 5 of 7 (306718)
04-26-2006 12:32 PM
Reply to: Message 4 by jar
04-26-2006 12:05 PM


Re: Proof is not in the pudding.
Phew.. I got it rightJ

Thanks for the link. Interesting reading. (Though I knew most of it).


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iano
Member (Idle past 114 days)
Posts: 6165
From: Co. Wicklow, Ireland.
Joined: 07-27-2005


Message 6 of 7 (306832)
04-26-2006 6:31 PM
Reply to: Message 3 by ohnhai
04-26-2006 11:59 AM


Re: Big Bang
Your post means I'll sleep easier tonight. You guys fall into the "know what your doing" class. It was that railway sleeper flying into the air that got the ?? going off in my head

Happy hunting


This message is a reply to:
 Message 3 by ohnhai, posted 04-26-2006 11:59 AM ohnhai has responded

Replies to this message:
 Message 7 by ohnhai, posted 04-26-2006 9:31 PM iano has not yet responded

  
ohnhai
Member (Idle past 3335 days)
Posts: 649
From: Melbourne, Australia
Joined: 11-17-2004


Message 7 of 7 (306909)
04-26-2006 9:31 PM
Reply to: Message 6 by iano
04-26-2006 6:31 PM


Re: Big Bang
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…

Neat :D

CBE: Changes the opening word from 'Aparently' to "Logically"

This message has been edited by ohnhai, 27-04-2006 02:05 PM


This message is a reply to:
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