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1994 Hunter 40.5

Rock Hall, Maryland, United States
$75,000 USD
Condition: Good

Hunter 40.5 a lot of upgrades, ready to go for the season.

Equipment: New Isotherm freezer, Adler Barbour fridge, Next gen generator, 2 AC’s the forward AC has been updated, electric main halyard winch, updated head sail, spinnaker, Garmin chart plotter, with new wind, speed, and depth instruments, cockpit cushions, windless, washdown, dinghy davits.

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Specs

Designer
Hunter Design Team
Builder
Hunter Marine
Associations
?
# Built
?
Hull
Monohull
Keel
Wing
Rudder
?
Construction
FG

Dimensions

Length Overall
39 11 / 12.2 m
Waterline Length
35 4 / 10.8 m
Beam
12 11 / 4 m
Draft
4 0 / 1.2 m
Displacement
20,000 lb / 9,072 kg
Ballast
7,000 lb / 3,175 kg

Rig and Sails

Type
Sloop
Reported Sail Area
760′² / 70.6 m²
Total Sail Area
760′² / 70.6 m²
Mainsail
Sail Area
427′² / 39.7 m²
P
52 0 / 15.9 m
E
16 4 / 5 m
Air Draft
63 3 / 19.3 m
Foresail
Sail Area
333′² / 31 m²
I
50 3 / 15.3 m
J
13 3 / 4 m
Forestay Length
52 0 / 15.9 m

Auxilary Power

Make
Yanmar or Volvo
Model
?
HP
50
Fuel Type
Diesel
Fuel Capacity
40 gal / 151 l
Engine Hours
?

Accomodations

Water Capacity
150 gal / 568 l
Holding Tank Capacity
?
Headroom
?
Cabins
2

Calculations

Hull Speed
9.4 kn
Classic: 7.97 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

9.42 knots
Classic formula: 7.97 knots
Sail Area/Displacement
16.5
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.
16.5
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
35.0
<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

35.0
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
202.4
200-275: moderate

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
202.39
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
29.1
20-30: coastal cruiser

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
29.06
<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
1.8
<2.0: better suited for ocean passages

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
1.83
<2: better suited for ocean passages
>2: better suited for coastal cruising

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