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Rifles, Reloading, Optics, Equipment
Gunsmithing
barrel diameters and muzzle brakes.
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<blockquote data-quote="Clark" data-source="post: 1080472" data-attributes="member: 6600"><p><img src="http://i757.photobucket.com/albums/xx220/ClarkM/RolandMagnusoninhisofficeatPACCARcirca1980.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p>Here is a pic of my father working on this gun patent:</p><p><a href="http://www.google.com/patents/US3894471" target="_blank">Patent US3894471 - Rapid fire weapon for turret installation - Google Patents</a></p><p></p><p>I asked him how to calculate the max pressure in a gun [for my 45/70 handi rifle]</p><p>He showed me Lame's formula in a textbook for thick walled cylinders, that Lame figured out 500 yeas ago:</p><p><a href="http://www.mydatabook.org/solid-mechanics/stress-for-thick-walled-cylinders-and-spheres-using-lames-equations/" target="_blank">Stress for Thick Walled Cylinders using Lamé</a></p><p></p><p><a href="http://en.wikipedia.org/wiki/Cylinder_stress" target="_blank">Cylinder stress - Wikipedia, the free encyclopedia</a></p><p>Then he said that thin walled hoop stress was</p><p>Stress in the steel = [pressure][inside diameter]/[2][wall thickness]</p><p></p><p>I asked him where he got that.</p><p>He shouted in my face, "BY INSPECTION!"</p><p></p><p>I was late the the party, but I guess if someone has to tell you how to calculate thin wall hoop stress, you are stupid.</p></blockquote><p></p>
[QUOTE="Clark, post: 1080472, member: 6600"] [img]http://i757.photobucket.com/albums/xx220/ClarkM/RolandMagnusoninhisofficeatPACCARcirca1980.jpg[/img] Here is a pic of my father working on this gun patent: [url=http://www.google.com/patents/US3894471]Patent US3894471 - Rapid fire weapon for turret installation - Google Patents[/url] I asked him how to calculate the max pressure in a gun [for my 45/70 handi rifle] He showed me Lame's formula in a textbook for thick walled cylinders, that Lame figured out 500 yeas ago: [url=http://www.mydatabook.org/solid-mechanics/stress-for-thick-walled-cylinders-and-spheres-using-lames-equations/]Stress for Thick Walled Cylinders using Lamé[/url] [url=http://en.wikipedia.org/wiki/Cylinder_stress]Cylinder stress - Wikipedia, the free encyclopedia[/url] Then he said that thin walled hoop stress was Stress in the steel = [pressure][inside diameter]/[2][wall thickness] I asked him where he got that. He shouted in my face, "BY INSPECTION!" I was late the the party, but I guess if someone has to tell you how to calculate thin wall hoop stress, you are stupid. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
barrel diameters and muzzle brakes.
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