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 Waterjet Specification, Design, & Application Documents
While waterjets from different manufacturers may look similar, they often have different operational attributes. Waterjet attributes should be matched to the hull design, and mission requirements. The following documents provide considerations when specifying waterjets and boat performance. Jet-Boat Design Considerations This PDF document provides a systemic approach for successful application of marine waterjet propulsion. Similar to other propulsion methods, a successful waterjet-propelled boat requires the harmonious operation of four elements: Mission, Hull, Power Source, Propulsor (waterjet). This document explores design and operation considerations for each element based on our experience, the experience of various boat builders and jet manufacturers, various technical papers, and other sources. Request PDF document on this topic. Waterjet Specification Many times the specification of a waterjet-propelled boat is based only on maximum speed at full throttle in calm water. However, in the real world, engine manufacturers want their engines to run at less than full throttle, boats become heavier in service, and the boats need to operate in less than ideal sea and wind conditions. Jet selection should also specify boat performance at cruise throttle in less than ideal conditions. Request PDF document on this topic. Preliminary waterjet Selection The engine power is often the first consideration for jet selection. However, the boat displacement is equally, if not more important. The power to weight ratio of the boat will primarily determine the speed of planing monohull. Next is the need to select a jet that will absorb the available engine power, without cavitation, at the estimated maximum boat speed AND at lower throttle settings in difficult sea conditions. Request PDF document on this topic. Nacelles For Optimizing UltraJet Propulsion Nacelles have been applied by a number of boat builders to optimize hulls for waterjet propulsion in single and twin-jet monohulls and in catamarans. This concept is especially useful to adapt hulls not normally considered suitable for waterjet propulsion. Request PDF document on this topic. UltraJet Installation In Fiberglass Hull Step-by-step photo description on the preparation and installation of UltraJet propulsion in composite hulls with single and twin UltraJet propulsion. Request PDF document on this topic. Boat Speed & Power Estimates If you would like to receive a performance estimate based on your specific hull and power, please complete and send an Application Questionnaire to Ultra Dynamics. PDF and online Application Questionnaires available at: Application Questionnaire. |
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