olute which, in spite of its high velocity, shows a muzzle en- protection to the cargo on the conveyer or in the an illustration of this gun engraved from a photograph ergy of only 30,750 foot-tons, the relatively small energy taken at the Proving Grounds, which shows both the being due to the very… … proach it in feet long, ac- New Navy 12-inch Qun at Indian Head—Muzzle velocity, 2,864 foot-seconds; muzzle energy, 47,994 foot-tons; foot-tons of respect of its cording to lo- energy per ton of gun, 893 ; powder pressure, 16*6 tons per square inch. e a 1 require- remaining en- ergies at the uieuts…
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