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Old 10-20-2019, 11:59 AM
Lloyd S.
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Pre-NATO Artillery



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During the World Wars continental and U.S, army artillery calibers were stated in millimeters. Our navies rated their heavy guns in inches, with the tube length in multiples of caliber (a 5"-38, for example, had a 5" bore with a barrel length of 38 x 5", or 15.8 ft.) Easy to do the conversion from mm to in. or vice-versa. The British army, though, rated their guns by projectile weight.

Does anybody know of some kind of table to do the conversion from pounds to inches or mm? It'd be interesting, for example, to know which US artillery piece was equivalent to, say, a British 15-pounder (assuming there is such a thing).

I know it's really odd to raise this question on a rimfire forum, but really can't think of anyplace else to go.
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Old 10-20-2019, 12:05 PM
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Sounds interesting to me. I've thought the same thing watching movies what something is equivalent to. Then we went off the rails with Fat Man, Little Boy and Honest John.

Last edited by scooter22; 10-20-2019 at 12:08 PM.
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Old 10-20-2019, 03:09 PM
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https://planetcalc.com/348/
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Old 10-20-2019, 03:30 PM
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Yes, but....

I don't know if his conversion works for cannon balls but it doesn't work for artillery shells. A 12 pounder fires a 3" shell... and so does a 15 pounder.
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Old 10-20-2019, 04:55 PM
Lloyd S.
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Quote:
Originally Posted by Sophia View Post
Yes, but....

I don't know if his conversion works for cannon balls but it doesn't work for artillery shells. A 12 pounder fires a 3" shell... and so does a 15 pounder.
I agree this won't work for 20th centurey breech-loading artillery. I googled "british army 25-pounder", for example, and learned it's projectile diameter was 3.45".
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Old 10-20-2019, 05:54 PM
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Maybe the British were referring to the cost of the projectile. Makes keeping your training exercises on budget easier to do.

Gregg
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Old 10-20-2019, 06:18 PM
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Gun Nomenclature
Naval Guns are usually classified by Caliber (diameter of the bore), Calibers (length of the barrel described in multiples of the diameter of the bore) and a Model or Reference designation. Some nations include a modification designation to indicate a change from the original design.30 Sep 2019

https://en.wikipedia.org/wiki/Britis...d_measurements
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Old 10-20-2019, 06:20 PM
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http://www.civilwarartillery.com/calibertopounder.htm
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Old 10-20-2019, 11:34 PM
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Quote:
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Clear as mud.
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