HMS Inconstant (H49)
HMS Inconstant was an built for the Turkish Navy, but was purchased by the Royal Navy in 1939.
Description
The I-class ships were improved versions of the preceding H class. They displaced at standard load and at deep load. The ships had an overall length of, a beam of and a draught of. They were powered by two Parsons geared steam turbines, each driving one propeller shaft, using steam provided by three Admiralty three-drum boilers. The turbines developed a total of and were intended to give a maximum speed of. The ships carried enough fuel oil to give them a range of at. Their crew numbered 145 officers and ratings.The Turkish ships mounted four 4.7-inch (120 mm) Mark IX guns in single mounts, designated 'A', 'B', 'X' and 'Y' from bow to stern. While under construction, their anti-aircraft (AA) armament was augmented by a single 12-pounder () AA gun that replaced the planned aft set of torpedo tubes. In addition the intended pair of quadruple mounts for the 0.5 inch Vickers Mark III machine gun were replaced by a pair of Oerlikon light AA guns. They were fitted with a single above-water quadruple torpedo tube mount amidships for [British 21 inch torpedo|] torpedoes. One depth charge rack and two throwers were fitted for 35 depth charges. The Turkish ships were fitted with the ASDIC sound detection system to locate submarines underwater and a Type 286 search radar.