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1969 Charley Morgan 41.
Equipment: QT20 electric motor
Aquamet 22 shaft and packing gland
400ah 48v battery bank
1415 watts of solar power
All victron electronics. Mppt 45/150, mppt 15/75, smart monitors, 12v 15A charger, 3000w multiplus inverter charger
120v, 3000 watt inverter charger
300ah 12v battery
17gph watermaker
45 gallons of water stowage
Electric head
Self tailing winches lewmar ocean 48
B&G Nac-3 Autopilot, Raymarine type 2 linear drive, B&G 12” vulcan chartplotter, B&G depth speed and temperature
Tigress windlass, 285ft chain, 55lb Vulcan ancho
The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.
Classic hull speed formula:
Hull Speed = 1.34 x √LWL
A more accurate formula devised by Dave Gerr in The Propeller Handbook replaces the Speed/Length ratio constant of 1.34 with a calculation based on the Displacement/Length ratio.
Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio.311
Hull Speed = Max Speed/Length ratio x √LWL
A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.
SA/D = SA ÷ (D ÷ 64)2/3
A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.
Ballast / Displacement * 100
A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.
D/L = (D ÷ 2240) ÷ (0.01 x LWL)³
This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.
Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)
This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.
CSV = Beam ÷ ³√(D / 64)
Westerbeke 4107 Diesel 40 hp. available as an option.
The OUT ISLAND 41, a completely different design and built much later, was also at one time, called the MORGAN 41.
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