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55' Motor Yacht

PRINCIPAL DIMENSIONS

LOA        55'-0"
DWL       49'-6"
Max Beam     16'-3"
Chine Beam   14'-3"
Max Draft      4'-9"
Max Height above DWL           13'-0"
Deadrise (TSM)  19.5
Deadrise (amidships)    23
Min. cabin headroom        6'-5"
Fuel       1,005 gal
Water     375 gal
Displacement   51,670
at half fuel & water
Engine:
  Isotta Fraschini,
  model V1308 T2, twin
Max Speed   25 knots

DESIGNER'S COMMENTS

Dieter Empacher was commissioned to design a 55' motor yacht for a client who previously owned a 120' yacht. Dieter Empacher Designs consulted with Propulsion Data, an internationally known marine consultant, to guarantee the comfort, luxury and performance that was familiar to the owner. The result is this 55' motor yacht with traditional superstructure and decorative varnished teak trim that reflects the owner's idea of a power cruiser.

The intended cruising area is between the US east coast and Nassau Island in the Bahamas, and to ensure a quick passage avoiding weather changes, the owner requested a top speed of 25 knots. To guarantee this speed and a comfortable ride, the underbody is a hard chine V bottom style. The V bottom design has a deadrise of 19 degrees at the transom. The full-length chine starts 2" above the waterline at the bow and fairs down and crosses the waterline at station 4. For added strength to the aluminum construction, the bow sections below the chine are convex up to station 3. To keep the 27" diameter twin propellers (2" diameter shaft) above the bottom of the skeg, a 13' long semi-tunnel was designed into the hull to provide tracking stability and good water flow. In addition, the most important factor is to keep the tip clearance of the propellers to the hull to reduce cavitation knocking.

The "Italian Stallion" twin engines are the owner's choice of power. The four oversized longitudinal girders, which incorporate the engines and V-drive beds, run the full length of the underbody of the hull to absorb engine vibration. To complete the major machinery and tankage, there are two Northern Lights generators, 20 kw and 8 kw; Lewmar tunnel bow thruster, model 300 TAH 15 hp; Lofrans Albatross windlass; fuel capacity 1,005 gallons; water capacity 375 gallons.

The generous center main salon houses the single steering station and has both port and starboard sliding doors as main entrances. Facing aft is the passage to the owner's stateroom with a king size berth and separate head and stall shower. Following is the main engine room below the aft cockpit. There are no openings from the owner's stateroom to the engine room for maximum noise reduction. Located forward of the main salon are two double staterooms, a separate head and the galley. All galley appliances are run by electricity supplied by the 20 kw main generator and 8 kw back up generator, which are located in the auxiliary engine room under the main salon. The V drive transmission units are also located in the auxiliary engine room and are well insulated for noise reduction. The large fuel and water tanks are located in and just aft of the auxiliary engine room with the center of the total tank capacity at the center of the longitudinal center of flotation. A cabin deck stepped mast supports the loading boom to launch the dinghy, located on top of the aft cabin. The fly bridge with its weather protective bimini supplies an additional launching area.



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