10.5 cm SK C/28 naval gun

The 10.5 cm SK C/28 gun was a naval gun developed by Germany during the late 1920s. It was the primary armament of the six Type 24 torpedo boats of the Reichsmarine.

Development and description
The gun was designed in 1928–1930 and entered service the latter year. It weighed 3660 kg and had an overall length of 5.76 m. Its 52-caliber barrel was 5.43 m long. The gun fired 10.5 cm fixed ammunition with a 14.7 kg projectile at a muzzle velocity of 925 m/s. This gave it a range of 17250 m at an elevation of 30°.

The gun was only used on the single-gun MPL C/30 mounting. It had a traverse of 360° and elevation limits of -10° and +30°. The manually operated mount could be traversed and elevated at a speed of 3° per second. The gun had a rate of fire of 15 rounds per minute.

The guns aboard the Type 24 torpedo boats GERMAN TORPEDO BOAT Luchs and GERMAN TORPEDO BOAT Leopard were bored out in 1932 to 12.8 cm and served as prototypes for the 12.7 cm SK C/34 gun.