HDMS Helgoland
HDMS Helgoland was a coast defence barbette ironclad bult for the Royal Danish Navy in the late 1870s. The ship was decommissioned in 1907 and subsequently scrapped.
Design and description
Helgoland was long overall, had a beam of and a draft of. She displaced and was fitted with a ram bow. Her crew consisted of 350 officers and enlisted men.The ship was fitted with a pair of Burmeister & Wain compound-expansion steam engines, each engine driving one propeller shaft using steam provided by eight cylindrical boilers. The engines were rated at a total of and gave the ship a speed of. Helgoland carried a maximum of of coal that gave her a range of at a speed of.
The ironclad's main battery consisted of a single 30.5 cm gun and four 26 cm guns. The Krupp 30.5 cm MRK L/22 was of the most recent hooped and jacketed construction. It was a rifled breech-loading (RBL) gun mounted in a barbette. Its caliber was and its length was 22 calibers. The four single 22-caliber RBL guns were placed in the corners of the armored citadel in the hull. For defense against torpedo boats, the ship was equipped with five 25-caliber guns. She was also fitted with two torpedo launchers.
Helogland had a complete waterline belt of wrought iron that ranged in thickness from amidships to at the ends of the ship. The barbette and the side of the armored citadel were protected by 260 mm of armor. The deck armor was thick while the conning tower was protected by armor plates.