October
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 31
Who's Online Now
4 members (mark, Mt Al, GETTEMANS, 1 invisible), 575 guests, and 3 robots.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums10
Topics39,489
Posts561,988
Members14,584
Most Online9,918
Jul 28th, 2025
Previous Thread
Next Thread
Print Thread
Page 2 of 2 1 2
Joined: Feb 2002
Posts: 14,447
Likes: 278
Sidelock
**
Offline
Sidelock
**

Joined: Feb 2002
Posts: 14,447
Likes: 278
Not just off brand early guns have a square junction at the breech. Early Parkers have that feature and I have never seen a cracked Parker. I am not making a point, but maybe someone will.

Joined: Jan 2006
Posts: 9,758
Likes: 460
Sidelock
***
Offline
Sidelock
***

Joined: Jan 2006
Posts: 9,758
Likes: 460
Was hoping Chuck or Don or another engineer would help us understand the simulation, but in my not particularly educated opinion, the value is in providing a visual illustration, rather than numbers.
I guess the scale has nothing to do with the yield strength of the frame.
IF however we knew the simulated pressure, we could know what percentage of that pressure was transmitted to the juncture of the frame.
And IF we knew the thickness of the metal, and the tensile strength thereof, we could estimate the pressure that would crack the frame, in that failure is a function of pressure, thickness and tensile strength (and some other stuff).

Quite some time ago I had METL do composition analyses on some frames, including a Sterlingworth frame Michael send me. Unfortunately no Flues. If I had been smart, I would have had the machinist transect the frames (and they had tears in their eyes as they were cutting the frames for testing wink ) to measure the thicknesses. I gifted the frames to the machinists and engineers to use a paper weights so they are unavailable now.
The study is at the bottom here
https://docs.google.com/document/d/1dnRLZgcuHfx7uFOHvHCUGnGFiLiset-DTTEK8OtPYVA/edit

[Linked Image from photos.smugmug.com]

I have a Parker frame, and if someone would like to send me a junker Flues frame I might just do that.

Joined: Jan 2006
Posts: 9,758
Likes: 460
Sidelock
***
Offline
Sidelock
***

Joined: Jan 2006
Posts: 9,758
Likes: 460
Inquiring minds want to know so I sent an email to Boxall & Edmiston

This thread might be of interest, which discusses the website stress analysis
https://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=636147

Could you please share the max. pressure used for the simulation, and the tensile strength of the frame steel?

Page 2 of 2 1 2

Link Copied to Clipboard

doublegunshop.com home | Welcome | Sponsors & Advertisers | DoubleGun Rack | Doublegun Book Rack

Order or request info | Other Useful Information

Updated every minute of everyday!


Copyright (c) 1993 - 2024 doublegunshop.com. All rights reserved. doublegunshop.com - Bloomfield, NY 14469. USA These materials are provided by doublegunshop.com as a service to its customers and may be used for informational purposes only. doublegunshop.com assumes no responsibility for errors or omissions in these materials. THESE MATERIALS ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANT-ABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. doublegunshop.com further does not warrant the accuracy or completeness of the information, text, graphics, links or other items contained within these materials. doublegunshop.com shall not be liable for any special, indirect, incidental, or consequential damages, including without limitation, lost revenues or lost profits, which may result from the use of these materials. doublegunshop.com may make changes to these materials, or to the products described therein, at any time without notice. doublegunshop.com makes no commitment to update the information contained herein. This is a public un-moderated forum participate at your own risk.

Note: The posting of Copyrighted material on this forum is prohibited without prior written consent of the Copyright holder. For specifics on Copyright Law and restrictions refer to: http://www.copyright.gov/laws/ - doublegunshop.com will not monitor nor will they be held liable for copyright violations presented on the BBS which is an open and un-moderated public forum.

Powered by UBB.threads™ PHP Forum Software 7.7.5
(Release build 20201027)
Responsive Width:

PHP: 7.0.33-0+deb9u11+hw1 Page Time: 0.076s Queries: 21 (0.057s) Memory: 0.8132 MB (Peak: 1.9022 MB) Data Comp: Off Server Time: 2025-10-04 18:06:21 UTC
Valid HTML 5 and Valid CSS