Page 51: of Marine News Magazine (May 2012)

52MNMay 2012PROPULSION UPDATE The efficiency of waterjets makes them suitable for avariety of tasks, including fast para-military patrol craft and combat craft using high speed diesel engines to drive UltraJet waterjets. UltraJet waterjets are constructed from marine grade aluminum alloy, with the impeller, its hous- ing and shafts made from stainless steel to deliver high performance and reduce short-term maintenance require- ments. ULTRA JETADVANTAGES :Today waterjet propulsion offering high speed and high thrust are often the preferred form of propulsion for many fast craft applications. When comparing waterjets size for size though, UltraJet waterjets offer unmatched high and low speed thrust, enhanced maneuverability, as well as shallow draft. The higher thrust capability of an UltraJet waterjet system enables craft to reach planning speeds quickly. The amount of thrust is an important issue, par- ticularly when craft are often built heavier than originally specified, or are used to carry additional loads. For mili- tary applications, the UltraJet design offers superior cavi- tation resistance, lower underwater acoustic signatures and less hull vibration.Crucial for successful patrol and intercept operations, Ultra Jets provide outstanding control and maneuverabil- ity whether loitering at slow speeds or engaged in high- speed pursuit. Navy Patrol Boats below have also been fit- ted with independent electro hydraulic control systems, a conventional steering wheel and twin lever reversing sys- tem for use in rough seas. This is backed up by an UltraJet joystick control system for ease of operation at lower boat speeds. Ultrajet Joins the FightMN#5 (50-59):MN 2011 Layouts 5/7/2012 10:19 AM Page 52