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Double Rifles, Single Shots & Combinations >> Building Double Rifles & Gunsmithing

Carpetsahib
.333 member

Reged: 29/04/07
Posts: 435
Loc: Western NC

Re: Which action for a homemade double rifle
23/02/10 08:55 AM

Quote:

only soft soldered

I did some calculations using published figures for Hi-Force 44 (4% Ag, 96% Sn): Shear Strength = 14000 psi to 28000 psi. Assuming a 12 ga gun, 2.5", 2.75" and 3" barrel shank lengths, and .800 in. diam., AND shear strength of only 2000 psi, I calculate the following max. loads to shear the joint:

2.5 in., Area = 6.28 in^2, load = 12500 lbs
2.75 in., Area = 6.91 in^2, load = 13800 lbs
3.00 in., Area = 7.54 in^2, load = 15078 lbs

If I assume a shear strength of 14000 psi, I find the following:

2.5 in., Area = 6.28 in^2, load = 88000 lbs
2.75 in., Area = 6.91 in^2, load = 96800 lbs
3.00 in., Area = 7.54 in^2, load = 105600 lbs

My conclusion: a positive mechanical lock is probably unnecessary for a relatively mild cartridge.

Post Extras

Entire topic
Subject	Posted by	Posted on
Which action for a homemade double rifle	lancaster	23/02/10 05:47 AM
Re: Which action for a homemade double rifle	450_366	23/02/10 06:20 AM
Re: Which action for a homemade double rifle	whitey	23/02/10 06:13 AM
Re: Which action for a homemade double rifle	Carpetsahib	23/02/10 06:24 AM
Re: Which action for a homemade double rifle	lancaster	23/02/10 06:41 AM
Re: Which action for a homemade double rifle	Carpetsahib	23/02/10 08:55 AM
Re: Which action for a homemade double rifle	500Nitro	23/02/10 07:13 AM
Re: Which action for a homemade double rifle	450_366	23/02/10 08:49 AM
Re: Which action for a homemade double rifle	500Nitro	23/02/10 09:08 AM
Re: Which action for a homemade double rifle	gryphon	23/02/10 07:27 PM
Re: Which action for a homemade double rifle	beleg2	23/02/10 10:44 PM

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