Silhouette 760 Design Philosophy
The Silhouette 760 aim is to create a modern stylish production sailing mega catamaran with exceptionally attractive lines. It is intended to lavish 10 guests in sheer luxury and entertain them with a host of fun water toys. Spaciousness was given priority over maximizing the number of cabins. The catamaran platform was chosen because of its inherent stability.
The level of luxury provided by the Silhouette compares to the best hotel. Its spacious master suite is truly spectacular and is positioned at bridge deck level to give it a commanding view. It boasts a knee height king size bed, full bath room (with bath and enclosed shower), electronic blinds, walk in clothes closet, settee and office.
The four sizable guest cabins too are very enviable; any one of them out strips the master suite on many far larger sized vessels. The beds in the guest cabins are Queen sized and are at knee level. For versatility the bed in one of the cabins is able to convert into two single beds.
The yacht has fine finishes throughout and its windows have remote controlled electronic blinds. Every cabin has a flat LCD TV and a large one in the saloon that is on a TV lift to hide it from view whilst it is not in use. Throughout the yacht the head room is generous 6’ 8” minimum.
The shaded cockpit is able to be enclosed with awnings during inclement weather. As an added attraction the yacht has a large fly bridge that presents panoramic views of its surroundings. All sailing operations are conducted from this area and it provides the crew with a good vantage point. The fly bridge has a mini bar and ample padded seating for guest comfort. The aft end of the bridge deck has hoisting tackle to raise the tender out of the water and eliminate the need for davits.
The steps in the wide transoms are attractively fanned to provide free movement between the water and cockpit. To make disembarking from a tender easy the inboard sides of the transoms are sculptured to form a tender dock. The lowest step is large enough to accommodate a number of people standing and it is contoured to receive the swim ladder when it is not in use.
Aft of the cockpit is a shaded swim platform with storage lockers for the life raft and small water toys. For SCUBA divers the area will be convenient o which to assemble their equipment and enter the water. Immediately forward of the transoms are storage lockers that are able to house 12 SCUBA tanks per side.
In the starboard bow there is a separate laundry with a commercial washing machine and clothes drier. It is also a good space in which to house a dive compressor.
To attract good staff the crew quarters are enviable and private. The captain’s cabin has a lofted bed and finishes in keeping with the rest of the yacht. It also has an office space for him to do his paper work in privacy. The facilities at the crew’s disposal have been given importance to enable them to maintain the yacht in the good order, to prepare top class cuisine, and to offer the level of service that is expected of them.
The Silhouette 760 is an enviable prestige private luxury yacht with a master suite that stands out against those found on mega power boats. In the Caribbean the yacht has proved to be one of the most successful and popular charter vessels in the region without having to rearrange its interior.
SUPER STRUCTURE STYLING
The unique styling of the super structure allows the design to fully utilize the volume below decks and adopt the ideal cabin layout. The spaciousness and outlook from the bridge deck master suite raises the bar to new heights for the standard of accommodation offered by yachts in this bracket. For private vessels the area is a spectacular owner’s suite.
The flush coach roof is free of steps enabling it to carry a host of water toys in their optimum storage position (second tenders, jet skis, sailing dinghies etc) with space left for entertaining and sun tanning. Its levelness of the area is a safety feature to those without their sea legs.
To give swimmers direct access from the water onto the trampoline a flight of stairs can be incorporated between the compression posts in the trampoline that can be lowered into the water.
SAIL PLAN & NUMBER OF CREW
Much attention has been given to simplifying of the sail plan and deck layout so as to minimize the number and strength of crew it takes to sail the yacht. With the standard layout two people can easily safely handle the yacht.
The fore sail is a high aspect ratio self tacking furling sail that can tacked without having to make any sail adjustments. Such an arrangement also has the advantage of being easier to handle in a breeze.
For downwind sailing and light weather reaching the yacht can be fitted with a bow sprit and furling Code 0. The yacht is also equipped to fly a spinnaker.
The main sail is a large powerful fully battened sail with an in-boom hydraulic roller reefing system. It is fully mechanized and makes sailing the yacht extremely easy.
Because the sleek hulls have relatively flat undersides it encourages the yacht to plane and therefore achieve high boat speeds. In light wind conditions the yacht sails at near wind speed. We have effortlessly sailed the yacht at 20 kts. with some wave action is present. On ocean crossings daily runs of 300 miles should be the norm.
With the recommended 240 HP engines’ running at 90% power the boat does 13 knots fully loaded. Such sized engines allow the yacht to make good progress into an adverse sea conditions. With the assistance of slight wave action she has attained 20kts under power alone. With one engine running at 2500rpm the yacht does 9.5 kts which demonstrates that the hulls are extremely efficient.
SIZE OF VESSEL
The modern trend is for sailing catamarans to become ever larger and the Silhouette 760 is keeping abreast with this dynamic. For the foreseeable future catamarans in the 70 to 80 ft range will be in demand which will enhance the Silhouette’s resale value.
LOAD CARRYING CAPACITY
Because catamarans are spacious they are often over loaded which impacts on their performance. We have attempted to counter this tendency by realistically assessing the payloads at design stage. This resulted in us adopting wide bodied hulls that provide the added benefits of having large internal volume and high resistance against pitching moments.
BRIDGE DECK CLEARANCE
The bridge deck has been placed at such a height that water slamming on its under side is virtually eliminated. Its clearance is well in excess of that used by most other comparable catamarans and was able to be attained while still maintaining the good aesthetics of the yacht.
Proven and modern boat building materials are used throughout. The structure is a composite sandwich construction. The core material is cross linked rigid PVC foam, light weight end grained balsa wood, and plywood in high stress regions. Engineered E-glass stitched fabric is used as reinforcing. Vacuum is applied throughout.
Every precaution is taken to prevent the occurrence of osmosis in accordance with the latest technology. In addition the hulls are painted with a special epoxy to create a completely water tight barrier around the yacht.
From the steering position the helmsman has clear all round visibility. Each rudder blade is connected to the steering wheel by means of sheathed stainless steel cables, thereby creating a duplicate steering system to enhance safety. For safety the rudders are attached to fixed skegs that protect them from impact.
The recommended motors are 240 HP turbo charged fresh water cooled Yanmar 4LHA-STP engines and marine gearboxes. The stainless steel propeller shafts are supported by phosphor bronze P-brackets. To minimize drag and maximize sailing speed the propellers used are four bladed folding props.
Each engine will be fitted with a dedicated water intake, electric oil change pump, sea water strainer and sea cock, return fuel lines and dedicated Racor fuel filter.
Additional diesel fuel storage tanks are able to be fitted if required.
The toilets resemble and operate those commonly found ashore. They flush silently and by the touch of a button. Their bowls are ceramic and can be flushed by either fresh or salt water.
All sewerage will discharge into sealed holding tanks. The holding tanks will be emptied via electric macerator pumps (when the yacht is in open water hopefully) or by pump-out stations. The vent pipes to the holding tank vents are led up the mast to exist well above deck level thereby preventing the odors to reach the occupants.
Provision is made to hold gray water, but normally it will be discharged immediately. The galley is fitted with a powerful garbage disposer.
The yacht will be fitted with both 110 and 220 Volt AC (60 Hz). Generally the heavier electrical loads such as air-conditioners, refrigeration compressors, hot water heater, battery charger, microwave, water maker etc. will operate off the 220 volt supply, and the house plugs and galley appliances off the 110 volts supply. All appliances and motors are able to run off both 60 and 50 Hz power.
On board AC electricity will be generated by means of a 20 kVA generator. An electronic inverter will be available to generate 110 volts 60 Hz for light loads when the generator is stationary.
Most DC equipment will operate from 24 volts.
The standard yacht will be fitted with two independent 38,000 BTU chilled water units. The chilled water is circulated around the boat in a closed loop and passed through radiators in the various cabins. The speed of the fan motors to these radiators is variable and individually controlled by thermostats.
Such installations are quiet because they do not require their compressors to be located nearby to the conditioned space, as do conventional individual units plus they require less maintenance than what individual units.