The full benefits of a single engine installation have been addressed in the "Fundamental Design Considerations" section of P.A.E.'s Nordhavn full line brochure.
For greater efficiency, lower noise, extended life, reduced vibration and less maintenance, P.A.E. recommends the combination of a low RPM diesel turning a large propeller through a high reduction gear box. Calculations and tank testing indicate the Nordhavn is easily driven at hull speed with an engine producing 225 continuous horsepower. This amount of power also provides for the loads of electrical and hydraulic accessories. In selecting engines, P.A.E. uses the more conservative, continuous horsepower ratings from engine manufacturers. One of the more popular engines for the 62 has been Lugger's L-6l25A, delivering 325 continuous horsepower. Built to run days on end, this engine is perfectly suited to the Nordhavn 62, which has the capacity to run l5 continuous days and nights with its standard fuel supply. Caterpillar, Cummins and Mann engines have also been successfully installed in the Nordhavn 62.
In lieu of a conventional wet exhaust, P.A.E. has invested years in developing a well-engineered, dry exhaust system. Well worth the effort, the dry system eliminates the need for a saltwater supply thru-hull, an engine mounted raw water pump, heat exchanger, anti-siphon valves and sea water injected exhaust hoses. Instead, the engine is cooled by a simple closed system that circulates the coolant through a captive series of tubes recessed in the vessel's hull. This keel cooler has no working parts and produces negligible hull drag. In addition to the advantages of not introducing the corrosive effects of saltwater into the boat's system, the dry exhaust system eliminates annoying exhaust gas and noise as the exhaust is vented far above the aft deck.
An adequate supply of clean fuel is the lifeblood of the true power voyager, and it is in the area of fuel management that Nordhavn has again spared no expense. The standard 62 is built with four fiberglass fuel tanks totaling 2,450 gallons. The fuel supply, return and transfer systems feature specially designed stainless steel selection manifolds, and the entire system of supplying, filtering, returning and transferring fuel has been well thought out and clearly labeled. There is an optional provision for introducing used engine oil into the fuel system in small percentages to be burned off, thereby increasing fuel capacity.
Noise control has also been given special attention considering that Nordhavns can be expected to run for days and days without stopping. Providing a low noise, low vibration environment is not only desirable, it is essential for the well-being and safety of the crew. To begin with, the engine room ceiling and bulkheads are treated with 3" and 2" lead/foam insulation and covered with white aluminum panels. The engine room hatches are equipped with heavy- duty rubber gaskets and lock down mechanisms. The saloon/galley cabin sole is built with a 2" Nida Core system with a l/4" Soundown decoupler layer. To reduce propeller noise being transmitted through the hull, the entire area above the prop rotation cavity is treated with two layers of specially designed sound dampening tiles. Overall, the results are dramatic, as one can actually hear the water passing along the hull at normal cruising speeds. Thanks to the heavy scantlings and special dampening efforts, vibrations throughout the boat are kept to a minimum. If a sailor is hesitant to switch to the comforts of power voyaging because of engine noise, a ride on a Nordhavn 62 will convince him otherwise.
"Get Home" power is a major concern for those venturing to far off places, and Nordhavn again gives this area special attention. Each 62 is equipped with a separate 4-cylinder wing engine that drives a feathering prop. The boat can be driven in open ocean conditions and is perfectly capable of being brought home if the main engine is disabled. The wing engine is installed with its own electrical system and is used to power the hydraulic systems for the bow thruster, windlass and emergency bilge pump system.
While the Nordhavn 62 is a sophisticated ship designed to provide all the comforts of home, every effort has been made to keep the electrical and mechanical systems as simple as possible and to provide backup systems where required. A l2 volt DC system along with a l20/240 volt AC system is standard, with the ship's AC being supplied by a Northern Lights 20 KW generator. Most boats are being equipped with inverters and extra large battery banks. Marine grade, tinned wire is used throughout, and wiring is done to ABYC standards. The electrical distribution panel is custom designed as each boat will have different needs. P.A.E. has become an expert in marine hydraulic systems, and the Nordhavn 62 makes good use of hydraulic equipment, including a bow thruster, windlass, active fin stabilizers, a cruising generator system and a high capacity emergency bilge pump system. The hydraulic steering system is equipped with an emergency tiller that attaches directly to the rudder post.
Commercial grade appliances are used where possible, and the owner has a wide number of choices in designing his personal yacht. Trash compactors, dishwashers, water makers and sophisticated entertainment systems are becoming popular options. Because the boat is designed to run in all kinds of weather, reverse cycle air conditioning and heating systems control the environment of every cabin. Most boats are being equipped with odor free, fresh water toilets and all plumbing fixtures are of the highest quality stainless steel.
Since each Nordhavn 62 is built to the owner's specifications, there is a great amount of flexibility in choosing equipment and accessories. The P.A.E. staff knows how to design systems and knows what equipment works best. With this experience, they will help to personally customize each individual boat and turn dreams of Nordhavns into reality.