|
S |
M |
T |
W |
T |
F |
S |
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
11
|
12
|
13
|
14
|
15
|
16
|
17
|
18
|
19
|
20
|
21
|
22
|
23
|
24
|
25
|
26
|
27
|
28
|
29
|
30
|
|
|
|
|
|
|
Forums10
Topics38,934
Posts550,868
Members14,460
|
Most Online1,344 Apr 29th, 2024
|
|
|
Joined: Feb 2004
Posts: 13,880 Likes: 16
Sidelock
|
Sidelock
Joined: Feb 2004
Posts: 13,880 Likes: 16 |
What are the specific physics that support a pressure pulse of approximately 50% of max chamber pressure in a localized area of the size seen here?
|
|
|
|
Joined: Dec 2001
Posts: 12,743
Sidelock
|
Sidelock
Joined: Dec 2001
Posts: 12,743 |
Chuck; I never studied physics so I guess I can't specifically answer your question. We are all though I think familiar with obstruction bulges & bursts. The physics would be essentially the same with the choke serving as the obstruction. Sir Gerald Burrard devoted a great deal of space to this subject. A through perusal of it is most enlightening.
Miller/TN I Didn't Say Everything I Said, Yogi Berra
|
|
|
|
Joined: Feb 2004
Posts: 13,880 Likes: 16
Sidelock
|
Sidelock
Joined: Feb 2004
Posts: 13,880 Likes: 16 |
I was surfing thru some gas dynamics blogs and didnt run across anything applicable. The stuff I stumbled on didn't specifically identify localized pressure spikes. Nor did it discuss any fractional slowing of a piston in a cylinder. However, I did read about a shock wave in front of a piston in a cylinder and some stuff about amplification when the cylinder area reduces.
|
|
|
|
Joined: Jul 2005
Posts: 7,065
Sidelock
|
Sidelock
Joined: Jul 2005
Posts: 7,065 |
So how thin were the walls at the burst? 5/1000th or 50/1000ths? If we are talking the last third of the muzzle end of the barrel 21/1000th is plenty for me. If we are talking a 1/2" from the muzzle end of the chamber it is not. Does the story that goes with that picture give any theories of the failure?
Last edited by AmarilloMike; 01/28/13 03:50 PM.
I am glad to be here.
|
|
|
|
Joined: Feb 2006
Posts: 3,763 Likes: 68
Sidelock
|
Sidelock
Joined: Feb 2006
Posts: 3,763 Likes: 68 |
David
|
|
|
|
Joined: Jul 2011
Posts: 839
Sidelock
|
Sidelock
Joined: Jul 2011
Posts: 839 |
If it's an LC Smith, my theory stops right there.
|
|
|
|
Joined: Feb 2009
Posts: 7,561 Likes: 249
Sidelock
|
Sidelock
Joined: Feb 2009
Posts: 7,561 Likes: 249 |
.....Does the story that goes with that picture give any theories of the failure?
There's some explanation in Doc Drew's link.
|
|
|
|
Joined: Jul 2005
Posts: 7,065
Sidelock
|
Sidelock
Joined: Jul 2005
Posts: 7,065 |
.....Does the story that goes with that picture give any theories of the failure?
There's some explanation in Doc Drew's link. Thanks Craig, I missed that. This is what Drew's caption to that picture said: "These images are entertaining only after knowing that injuries sustained were not life threatening. Please be careful out there! 1918 12g L.C. Smith Field Ruptured barrel with first shell of Bismuth Magnum Game Load 2 3/4" 1 3/8 oz. shot"
I am glad to be here.
|
|
|
|
Joined: Jan 2006
Posts: 9,528 Likes: 354
Sidelock
|
Sidelock
Joined: Jan 2006
Posts: 9,528 Likes: 354 |
Mike: I'm sorry but I don't have any more information. As I recall no attempt was made to measure wall thickness.
|
|
|
|
Joined: Jul 2005
Posts: 7,065
Sidelock
|
Sidelock
Joined: Jul 2005
Posts: 7,065 |
Thanks Drew. I would be interested in sending my wall thickness gauge to the gun's owner and ask him to measure the wall thickness at the burst. Of course in that configuration a micorometer would work too!
Last edited by AmarilloMike; 01/28/13 07:07 PM.
I am glad to be here.
|
|
|
|
|
|