Screw of the Warrior, 1861. Diagram of the propellor of an ironclad steamship, showing water level. This vessel, the first completed of our new iron-clad ships-of-war, and by far the noblest and most efficient fighting-ship in commission in the world...The rapidity with which the works have been carried on since the ship was launched is most creditable to the contractors, the Thames Shipbuilding Company, and the manner in which the whole of the works of a novel and exceedingly difficult character have been executed has given perfect satisfaction to the inspectors appointed by the Government...The Warrior is fitted with Messrs. John Penn and Sons patent trunk-engines, of 1250-horse power, similar in construction to those fitted be many of her Majestys ships, having two cylinders of 112 in. diameter each, with 4 ft. length of stroke, and are intended to make about fifty-five revolutions per minute. About 130 ft. of wrought-iron shafting, of 17 in. diameter, intervene between the engines and the screw. The screw is made of gun-metal, and is capable of being disconnected from the engine-shafting, and hoisted on deck while sailing or for repairs. The screw, with its hoisting-frame and apparatus, weighs about 35 tons. From "Illustrated London News", 1861.