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10.16 cm = 1.016 dm – 1 hand used in measuring height of horses (4 inches) 12 cm = 1.2 dm – diameter of a compact disc (CD) (= 120 mm) 15 cm = 1.5 dm – length of a Bic pen with cap on; 22 cm = 2.2 dm – diameter of a typical association football (soccer ball) 30 cm = 3 dm – typical school-use ruler length (= 300 mm)
The 8.8 cm KwK 36 was derived from the 8.8 cm Flak 36 anti-aircraft gun by adapting/modifying it to the limited space available in tank turrets. Parts of the KwK 36 were built to practically the same design as the 75-millimetre (3.0 in) and 50-millimetre (2.0 in) guns already used in German tanks.
It was designed to replace the older 8.8 cm SK L/45 naval guns on German light cruisers. The SK C/32in variant of the gun had a loose two-part barrel with vertical sliding-block and was carried on a modified twin 10.5 cm Dopp L C/37 mounting and was intended for the unbuilt M-class cruiser .
Eventually these guns were replaced by the new 8.8 cm SK C/31 naval gun, 8.8 cm SK C/32 naval gun or the 10.5 cm Flak 38, with most ships being refitted by 1939. [ 6 ] During the 1930s surviving SK L/45 guns were modified to use the same ammunition as the 8.8 cm SK C/30 naval gun and had similar performance.
The 8.8 cm SK L/35 was a widely used naval gun on many classes of World War I battleships, cruisers and torpedo boats in both casemates and turrets. Its primary use on battleships and cruisers was as an anti-torpedo boat gun, while on torpedo boats it was their secondary armament. Ship classes that carried the 8.8 cm SK L/35 include:
The 8.8 cm SK C/31 gun weighed 4,255 kilograms (9,381 lb), had an overall length of 6.87 meters (22 ft 6 in) and its bore length was 6.341 meters (20 ft 9.6 in). It used a vertical sliding-block breech design. The gun was normally on the twin gun carriage (German: Doppel Lafette or abbreviated Dopp. L) C/31, the mount plus guns weighed 27,300 ...
The 8.8 cm SK C/35 gun weighed 776 kilograms (1,711 lb) and had an overall length of 3.985 meters (13 ft 0.9 in) with a vertical sliding-block breech.The gun fired a 9.5 kg (21 lb) projectile 88 mm in diameter, and the barrel is sometimes described as 45 caliber.
Here is a common conversion table with roughness grade numbers: ... 8 8.8 8 1.2 N3 0.1 4 4.4 4 0.8 N2 0.05 2 2.2 2 ... a and the root mean square wavelength ...