SCRKW-PROPEM.EI) SHIPS. (FROM IIIC " ONITfcU BhRVIC« OAZBTTB.") Two or three circumstances have recently occurred which indi cate very strikingly tliat tliero h somtthing radically at fault in tho form and construction of our «crew ships, *nd in the modo of propelling and steering them Tlio lute trial of tho Black Prince— uno of the circumstances to which wo refer — ought to demand the serious and prompt attention of naval constructors It lms been found necessary to build iron plated ships of excesshe length and large dimensions to enable them to carry armour-pUtes and attain a high rate of speed, and the Bliek Prince, one of the class, accordingly nieasuie? nearly 401* feet over all The ship it propelled, us mo3t people arc aware, by an enormous strew, plated in an aperture in the stein framework, immediately before the rudder, and when tried lust week, at full speed, notw lthstand intr the poworful mechanical appliances attached to the rudder-head, it took twelvo men to put tho helm hard over to port or starboard And whon by these means the 1 udder was jot over, the ship occupied upwards of ten minutes in deacntiinga circle, and more than half the time in making tho half ciicle. It ha» al«o been found tliat unless thu engines are at full speed, the ship has only very imperfect steerage way. so that were such a ship in action in company with a fleet or squadron she would bo moie dangerous to friends than foos Tho second fact to which we desire to c»H attention is the condition of the Orlando, now at Chatham Although a new and beautifully-modeled ship, built of the best-seasoned and strongest materials, and put together in the most aitistic way, the Oilando was found after a voyage to tho West Indies anil back, leaky, aud shaken from stem to stern, llio Oilindo is also a very long ship, upwards of three hundred feot— and very difficult to steer. 