5 - Brief over View of the Technical Specifications
5-1) The design
The design of the Yacht as drawn in the General Arrangement Plan is executed by Vripack Yachting International Naval Architects B.V. The Netherlands.
5-2) Operational Profile
It is envisaged that the Yacht will be cruising for long periods of time with Owner and guests on board, predominantly in warm and tropical waters.
It is estimated that the main engines will run approximately 1000 hours per year at 90% load.
5-3) Expected Quality of the Finished Product & Comfort At Sea
The Yacht shall be designed and built to the luxury Yacht standard for the interior as well the exterior in all respects, not only surface finishes.
It is intended that the Yacht provides a high level of comfort in all sea conditions and that it shall be able to be put to sea safely on an even keel under the various loading conditions.
5-4) Propulsion System
It is envisaged that the Yacht be fitted with a twin-screw propulsion arrangement consisting of two four stroked turbo charged, after cooled marine diesel engines. Preliminary calculations indicate a total brake power requirement of approximately 708 BKW (950 BHP) to achieve the specified performance. Preliminary calculations indicate that two propellers of approximately 1220 mm diameter turning at 445.5 RPM (maximum tip speed 28.46 m/sec) can absorb the delivered power. Propellers are to be manufactured in Ni-Al-Bronze and to be of a low noise design with skewed blades.
5-5) Speed & Range
Sustained cruising speed shall not be less than 12.0 knots at 90% maximum continuous rating at half load displacement at sea trial conditions. The range of the Yacht shall be 5.000 nautical miles with 10% consumable left on arrival. This is based on an average speed of 10 knots including a 15 % weather allowance. (Resistance augmentation)
5-6) Bow Thruster
One 75 hp (56 kW) bow thruster, make Cramm, type V2-18H, dual prop counter rotating, existing of:
A thick walled steel tunnel, 478 mm ID, 508 mm OD with rounded hull insert ring and 15° angled grills on both side. Thrust 1000 kg.
Stainless steel drive unit with stainless steel propeller and stainless steel protection ring around propeller, driven by the 140 cc hydraulic plunger motors. Control panel with proportional joystick mounted in steering station and both wing stations. Matching electronics built-in Rittal enclosure.
5-7) Stabilizer System
A complete stabilizer system, Naiad-Koop, model NK 353, will be installed.
Two fin blades, 1.49 m2 of composite fiberglass with NACA profile and tapered shaft insert. Two fin actuator units for 2 x 32° effective fin angle with two 2” hydraulic cylinders and 3.5” high-tensile stainless steel shaft. Complete with splash-water proof fin angle sensor and emergency centering bolts. Two steel thru-hull welding bushing with flange to fit the fin actuator unit. Two aluminum manifold blocks with NG10 electro-hydraulic servo valve, double pilot operated check valve and a bypass valve for emergency centering. Completely wired and assembled on a mounting bracket with a high-pressure filter with visual and electrical clogging signaling and a shut-off valve.Two check valves to be fitted in the pressure line. One DATUM sensor package for roll rate, roll angle and roll acceleration. |