The BL 18-inch Mk I naval gun was a breech-loading naval rifle used by the Royal Navy during World War I. It was the largest and heaviest gun ever used by the British. [1] Only the Second-World-War Japanese 46 cm/45 Type 94 had a larger …

The 18"/48 caliber Mark 1 – United States Naval Gun was the initial name and design for a large caliber naval gun in the early 1920s. After the Washington Naval Treaty prohibited the development of guns larger than 16 in (406 mm), the gun was relined and finished as a high velocity 16"/56 Mark 4 gun.

The Japanese 46 cm/45 Type 94 naval gun was a 46 cm (18.1 in) naval gun with the largest bore diameter of any gun ever mounted on a warship. Only two ships carried them, the Imperial Japanese Navy 's World War II battleships Yamato and Musashi .

One of two 18" (45.7 cm) Type C Target Projectiles on display at Building One, NSWC Crane, Indiana. Plate reads "18 inch Experimental Projectile." This is one of the test Projectiles made in 1923 for experimenting with the original 18"/48 (45.7 cm) Mark 1 gun.

When you see photographs of modern fighter jets carrying 2,000-lb., low-drag bombs, think of the Navy’s only 18-inch gun—the largest and most powerful American gun ever built! The renderings...

The 18"/48 caliber Mark 1 – United States Naval Gun was the initial name and design for large caliber naval gun in the early 1920s. After the Washington Naval Treaty prohibited the development of guns larger than 16 in (406 mm), the gun was relined and finished as a high velocity 16"/56 Mark 4...

In the early 1920s, the USN was in the process of developing the 18"/48 (45.7 cm) Mark 1 naval gun. The prototype for this weapon was about halfway completed when the Washington Naval Limitation Treaty of 1922 outlawed guns larger than 16" (40.6 cm).

A total of three 18" (45.7 cm) guns were built by the Armstrong Works at Elswick, the only manufacturer capable of making such large weapons. These guns were designated as "15 inch B" during their design and construction in an effort to hide their true size.

Did Scientists Actually De-Extinct the Dire Wolf? Colossal Bioscience says it has “de-extincted” the dire wolf, but other scientists disagree and say more important conservation science is being...

Apr 29, 2016 · Its sole purpose was to act as the platform upon which heavy calibre guns of between 12-in. and 16.25-in. (110 tons or 111,765 kg) were placed in order to conduct proof and other experimental firing. It is a unique and historic piece and older than the barrel having been constructed at the Royal Carriage Department, Woolwich in 1886.