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Make an Offer: Motivated Sellers Boat is As is/Where is. She does need some love! Hunter Marine introduced the Hunter 31 in 1983, and it remained in production for four years. Our 1984 Hunter 31 is named Aeolus.
We purchased this boat thinking we would like to continue sailing, but have found that other activities have taken our time. She needs a good home. She is on the hard at Lake Stockton and can come with a very hard to obtain slip. New Bottom paint this season. Sails include: main, jib and spinnaker. New water heater ready to install. No quarter berth cushions.
Power is supplied by a 16-horsepower Yanmar diesel. This engine was replaced sometime in the early 2000;s and she runs great. The engine compartment has surprisingly good access for a boat of its size.
Hunter 31 LOA 31′ 4″ (9.55 m.) LWL 26′ 3″ (8.00 m.) Beam 10′ 11″ (3.33 m.) Draft (shoal/deep) 4′ 0″/5′ 3″ (1.22/1.60 m.) Sail Area (100%) 458 sq. ft. (42.55 sq. m.) Ballast 3,500 lb. (1,587 kg.) Displacement 9,000 lb. (4,082 kg.) Ballast/D .39 D/L 222 SA/D 16.9 Water 35 gal. (133 l.) Fuel 18 gal. (68 l.) Engine 16-hp. Yanmar diesel Designer Cortland Steck and Hunter Design Group
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)
Shoal draft: 4.0’/1.22m
Disp. (Shoal draft): 9900 lbs/4494 kg
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