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Seller's Description

1998 Hunter 310 - Air Conditioning - Very Nice The goal of the 310 was maximum livability with good short-handed performance. This 31-foot cruiser provides surprising room and private accommodations for her size. The circular cockpit with a molded table/steering pedestal works well creating space, affording security, and promoting comfort. The 310 is maneuverable, reversing course in twice her length or less. She is relatively close-winded, making good way to weather in flat water and light air. A Great Boat for the Lake or Coastal Cruising Basic Boat Info Boat Name: Indy J Make: Hunter Model: 310 Year: 1998 Condition: Used Category: Sail Builder: Hunter Marine Designer: Hunter Design Team Construction: Fiberglass Boat Hull ID: HUN31166D797 Has Hull ID: Yes Keel Type: Winged Keel Dimensions Length: 31 ft Length Overall: 30’10 ft Waterline Length: 28 ft Beam: 10’10 ft Max Draft: 4 ft Cabins Count: 2 Engines / Speed Engines: 1 Make: Yanmar Model: 18 Fuel: Diesel Engine Power: 18hp Type: Inboard Engine Location: Center Drive Type: Direct Year: 1998 Tanks Fuel Tanks: 1 Fuel Tank Capacity: 25 gal Water Tanks: 1 Water Tank Capacity: 20 gal Other Heads Count: 1 Drive Type: Direct Boat Class: Cruisers

Equipment: Accommodations Slightly offset double V berth forward with hanging locker to port Opposing settees in main salon with dining table on a pedestal Head to port of companionway Private double berth and hanging locker in aft cabin Galley is to starboard of companionway with double burner stove, microwave, sink and ice box with refrigeration Air Conditioning/Heat Flat screen TV with DVD player Deck, Sails & Rigging Good size rounded cockpit with steering pedestal and fold down table Walk through transom with swim platform Metal arch with traveler Bimini B&R Rig Roller Furling Genoa Hinged door on companionway Electronics 12v system for cabin and navigation lights/instruments Shore Power with Cord and outlets in cabin Air Conditioning/Heat TV with DVD player

Specs

Designer
Hunter Design Team
Builder
Hunter Marine
Associations
?
# Built
?
Hull
Monohull
Keel
Fin + Bulb
Rudder
Spade
Construction
FG

Dimensions

Length Overall
30 10 / 9.4 m
Waterline Length
27 11 / 8.5 m
Beam
10 9 / 3.3 m
Draft
5 6 / 1.7 m
Displacement
8,500 lb / 3,856 kg
Ballast
3,000 lb / 1,361 kg

Rig and Sails

Type
Sloop
Reported Sail Area
464′² / 43.1 m²
Total Sail Area
464′² / 43.1 m²
Mainsail
Sail Area
248′² / 23 m²
P
39 0 / 11.9 m
E
12 7 / 3.9 m
Air Draft
49 4 / 15 m
Foresail
Sail Area
216′² / 20.1 m²
I
37 0 / 11.3 m
J
11 8 / 3.6 m
Forestay Length
38 10 / 11.9 m

Auxilary Power

Make
Yanmar
Model
?
HP
18
Fuel Type
Diesel
Fuel Capacity
25 gal / 95 l
Engine Hours
?

Accomodations

Water Capacity
20 gal / 76 l
Holding Tank Capacity
?
Headroom
?
Cabins
2

Calculations

Hull Speed
8.8 kn
Classic: 7.09 kn

Hull Speed

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.

Formula

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

8.8 knots
Classic formula: 7.09 knots
Sail Area/Displacement
17.8
16-20: good performance

Sail Area / Displacement Ratio

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.

Formula

SA/D = SA ÷ (D ÷ 64)2/3

  • SA: Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
  • D: Displacement in pounds.
17.83
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
35.3
<40: less stiff, less powerful

Ballast / Displacement Ratio

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.

Formula

Ballast / Displacement * 100

35.3
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
173.2
100-200: light

Displacement / Length Ratio

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.

Formula

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

  • D: Displacement of the boat in pounds.
  • LWL: Waterline length in feet
173.15
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
19.0
<20: lightweight racing boat

Comfort Ratio

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.

Formula

Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)

  • D: Displacement of the boat in pounds
  • LWL: Waterline length in feet
  • LOA: Length overall in feet
  • Beam: Width of boat at the widest point in feet
18.95
<20: lightweight racing boat
20-30: coastal cruiser
30-40: moderate bluewater cruising boat
40-50: heavy bluewater boat
>50: extremely heavy bluewater boat
Capsize Screening
2.1
>2.0: better suited for coastal cruising

Capsize Screening Formula

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.

Formula

CSV = Beam ÷ ³√(D / 64)

  • Beam: Width of boat at the widest point in feet
  • D: Displacement of the boat in pounds
2.12
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

Shoal draft version: 4’. As with most other later boats built by Hunter Marine, the 310 has the Bergstrom & Ridder rig with no backstay.

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