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The Mark 7 was a variable-yield fission weapon that used a levitated pit and an implosion design with 92 high-explosive lenses. The weapon had multiple yields of 8, 19, 22, 30, 31, and 61 kt by using various weapon pits. [4] The weapon had airburst and contact fuzing modes. The weapon used in flight insertion for safing and later versions of ...
Mod 11 was a Mod 7 that had the chamber lengthened, adding 235 cu in (3,851 cm 3), and a 3½° breech band seating slope and used Breech Mechanism Mark 12. Mod 12 used a Mod 10 and lengthened the chamber and added a 3½° breech band seating slope with Mod 13 being similar but of a Mod 8, Mod 14 used a Mod 9, Mod 15 used a Mod 7, Mod 16 used a ...
The Mk 7 Mod 4 bomb dispenser differs from the Mk 7 Mod 3 by modifying the dispenser and giving interface capabilities with a wider range of military aircraft. The Mk 7 Mod 6 bomb dispenser is the same as the Mk 7 Mod 3 except that the outside of the Mod 6 cargo section is coated with a thermal protective coating and has an additional yellow ...
Mod 6 was skipped and Mod 7 was an experimental Mod 4 bored out to use bag ammunition, a 1,367 cu in chamber, 1.83 in (46 mm) think faceplate added to the breech end, and a trunnion hoop added. With Mod 8, gun No. 161, a Mod 4 gun, a 30 in (760 mm) muzzle liner and muzzle bell were used and the rifling was a uniform 1/25 instead of 0 to 1/35.
Marks 3 & 4: 16,000 yd (14,630 m) at 20.1° elevation. The 8"/35 caliber gun Mark 3 and Mark 4 (spoken "eight-inch-thirty-five--caliber") were used for the main batteries of the United States Navy 's first armored cruisers and the secondary batteries for their first battleships, the Indiana -class. The 8"/40 caliber gun Mark 5 initially armed ...
The Mark 7 had significantly better armor penetrating capabilities, owing to its higher muzzle velocity (and thus higher striking velocity). At a range of 12,000 yd (11,000 m), the gun could penetrate 12.3 in (310 mm) of contemporary face-hardened armor, compared to 10.8 in (270 mm) for the Mark 5.
Maximum firing range. 19,000 yd (17,000 m) at 25.3° elevation. The 5"/50 caliber gun (spoken "five-inch-fifty-caliber") was the first long barrel 5-inch (127 mm) gun of the United States Navy and was used in the secondary batteries of the early Delaware -class dreadnought battleships, various protected cruisers, and scout cruisers.
The 16-inch Mark 2 was 50 calibers long, with a liner, an A tube, jacket and seven hoops with four hoop locking rings and a screw box liner. The Mod 0 used an increasing twist in the rifling while the Mod 1 used a uniform twist and a different groove pattern. The Mark 3 was the same as the Mark 2 but used a one-step conical liner.
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