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1974 Allied Mistress MK II Ketch 39

Listed

Seller's Description

Perkins 4-108 50-hp diesel. Wheel steering. Radar, GPS, stereo, refrigeration, air conditioning. Partially completed refit. New standing rigging, halyards, chain plates and roller furling. Two sets of sails including main, mizzen, working jib, 2 genoas, storm jib and trysail, mizzen staysail. 3-blade folding propeller. Chain rode, 30 and 60 # CQR anchors. A solid blue water cruiser. Plainfield, CT. $25,000

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Specs

Designer
Arthur Edmunds
Builder
Allied Boat Company Inc.
Associations
?
# Built
60
Hull
Monohull
Keel
Long
Rudder
?
Construction
FG

Dimensions

Length Overall
39 7 / 12.1 m
Waterline Length
29 9 / 9.1 m
Beam
12 0 / 3.7 m
Draft
4 5 / 1.4 m
Displacement
20,800 lb / 9,435 kg
Ballast
5,600 lb / 2,540 kg (Lead)

Rig and Sails

Type
Ketch
Reported Sail Area
705′² / 65.5 m²
Total Sail Area
607′² / 56.4 m²
Mainsail
Sail Area
283′² / 26.3 m²
P
39 0 / 11.9 m
E
14 6 / 4.4 m
Air Draft
?
Foresail
Sail Area
325′² / 30.2 m²
I
43 11 / 13.4 m
J
14 9 / 4.5 m
Forestay Length
46 4 / 14.1 m
Mizzen
PY
22 11 / 7 m
EY
8 5 / 2.6 m

Auxilary Power

Make
Westerbeke
Model
4-107
HP
37
Fuel Type
Diesel
Fuel Capacity
80 gal / 303 l
Engine Hours
?

Accomodations

Water Capacity
160 gal / 606 l
Holding Tank Capacity
?
Headroom
?
Cabins
?

Calculations

Hull Speed
7.3 kn
Classic: 7.32 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

7.29 knots
Classic formula: 7.32 knots
Sail Area/Displacement
14.9
<16: under powered

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.
14.92
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
26.9
<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

26.92
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
350.1
>350: ultraheavy

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
350.09
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
35.5
30-40: moderate bluewater cruising 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
35.54
<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
1.75
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

Available in aft (drawing top) and center cockpit (cutaway bottom) versions. When first introduced it was called the ALLIED 39 CRUISING KETCH. (Not to be confused with another ALLIED 39, from the same builder.)
The MISTRESS 39 MKII, an aft cockpit version with a clipper bow and other differences was introduced in 1975.

This listing is presented by GoodOldBoat.com. Visit their website for more information or to contact the seller.

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