May 2nd, 2010 
molitva leyli 
Designed from the ground up the advanced Aeroyacht 121′ luxury catamaran is today’s most innovative American performance yacht. As one of the largest composite catamarans in the world she is the first model of a sleek, new range representing the ultimate high-performance, supremely styled world traveler. (more…)
Posted in DESIGN boat ship yacht vessel watercraft, LUXURY YACHT, MATERIAL boat ship yacht vessel pontoon, MULTI HULL, PROPULSION boat ship yacht vessel watercraft 
Tags: Aeroyacht, Aft, biaxial fiber E-glass, boat material, carbon fiber, catamaran yacht, composite catamarans, deckhouse, fastest sailing yacht, futuristic catamaran, largest, largest composite catamarans, luxury catamaran, luxury yacht, multihull, naval-architect, propulsion, PROPULSION boat ship yacht vessel watercraft, sailing catamaran, sailing catamaran yacht, sailing yacht, wide beam 
No Comments » May 2nd, 2010 molitva leyli 
The hull form is a deep V of 22 degrees at the stern, with a straight stem bow designed to perform as a wave piercing.
The WallyPower has followed an intensive and exceptional Research & Development programme that involved specialised facilities (like SSPA in Sweden, the Ferrari Wind Tunnel Facility) to test the new features of the yacht. As a result, the 118-foot (36-meter) WallyPower stands out for her technology as well as for her contemporary design.
Posted in DESIGN boat ship yacht vessel watercraft, INNOVATIVE DESIGN boat ship yacht vessel watercraft, LUXURY YACHT, NEW CONCEPT boat ship yacht watercraft vessel, POWER boat ship yacht vessel watercraft, PROPULSION boat ship yacht vessel watercraft Tags: 118 Wallypower, Advanced Composites, aerodynamics boat, aft sliding gangway, boat 2010, Bulwarks, carbon fiber, cool baot design, cutting-edge innovation, Detroit Diesel, Diesel Engines, diving platform, Forward Deck, Gas Turbines, glass superstructure, hi-tech exhaust, high perfomance, hull technology, Laminated Glass, Megayacht, Metallic Colour, open-air gym, propulsion system, ride quality boat, Specialised Facilities, Sspa, stable boat, Swedish Navy, V-shape hull, Wally Yacht, WallyPower, Wind Tunnel Facility, yacht construction, yacht design No Comments » May 1st, 2010 molitva leyli 
Marine PropellerA propeller is the most common propulsor on ships, imparting momentum to a fluid which causes a force to act on the ship.
The ideal efficiency of any size propeller is that of an actuator disc in an ideal fluid. An actual marine propeller is made up of sections of helicoidal surfaces which act together ‘screwing’ through the water (hence the common reference to marine propellers as “screws”). Three, four, or five blades are most common in marine propellers, although designs which are intended to operate at reduced noise will have more blades. The blades are attached to a boss (hub), which should be as small as the needs of strength allow – with fixed pitch propellers the blades and boss are usually a single casting. (more…)
Posted in POWER boat ship yacht vessel watercraft, PROPULSION boat ship yacht vessel watercraft Tags: Alternative Design, Azimuthing propeller, cavitating propeller, Circ, Control Linkages, controllable pitch propeller, Cpp, Crp, Drive Machinery, Drive Shaft, Enormous Differences, highly maneuverable propeller, Insufficient Torque, Marine Propeller, Marine Propellers, Marine Propulsion, Mechanical Complexity, modular propeller, Pitch Propellers, Propeller Shaft, Rapid Change, skewback propeller, Stern Tube, supercavitating propeller, surface piercing, Trailing Edge, Transmission Power, Transverse Axis Propellers, Voith-Schneider propeller, Z-drive No Comments » May 1st, 2010 molitva leyli Propeller efficiency for any particular installation, without having to go through a super detailed analysis of fluid dynamics. Particular planing boat with one particular motor.
Let’s say these are the parameters for this installation:
Motor RPM: 5,750
Gear Ratio: 2:33 to 1
Propeller RPM: 2,468 for both props
HP at prop at WOT: 74
Prop: SS 3 Blade 36.9 MPH 13″ Diameter 17″ Pitch AND a
Prop: SS 4 Blade 35.1 MPH 12 3/4″ Diameter 16″ Pitch
Boat Weight: 2,000 pounds
Boat Length: 18′
With a Speed Length Ratio of 7.8
The 3 blade has a crouch number of: 192
The 4 blade has a crouch number of: 182
the answer; (more…)
Posted in PROPULSION boat ship yacht vessel watercraft Tags: Blade, Boat Length, boat propeller, Boat Weight, Diameter, Efficiency, Fluid Dynamics, Gear Ratio, Hp 19, Hp 20, Length 18, Length Ratio, Pi, Pitch, propeller choice, Props, propulsion, propulsion efficiency, propulsion formula, Rpm, Speed Boats, Top Speed, Wot No Comments »
Modern High Speed Hydrofoil Boat Design Concept
Flatboat - Barge
How To Build Fiber Boat