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Seller's Description

Newly listed, new out of water full SURVEY completed. Just came out of the boatyard with a partial refit. New awlgrip hull paint job (3 coats 545 primer and 3 coats Awlgrip Pearl Gray) hull with incredible shine. New bottom (after soda blast cleaned old coatings off… then any repairs made) with 3 SeaHawk Tuff Stuff epoxy barrier coats and SeaHawk Biocop antifouling (top of the line). New shaft seal, shaft and prop reconditioned and balanced, velvet drive transmission rebuilt and full engine rebuild (Perkins 6.534m). They don’t build boats like this anymore. She’s big, roomy, capable and comfortable. She has a heavily built hull (2” thick is unheard of in today’s production boats) and she performs very well. She is safe and a joy to sail. We sailed her often, so she has been used much during our ownership. She makes for a wonderful and roomy live aboard. She has the optional larger 130 hp Perkins diesel engine (rather than the standard 85hp), which is very efficient and capable when you need that power. Just completed a full rebuild, so she is reset to 0 hours after rebuild. Deck epoxy paint is in good shape. 3 staterooms 3 heads with showers

Equipment: New underwater lights at aft stbd and port (also lights prop/shaft/rudder area) She holds 380 gallons of water She holds 275 gallons of fuel 130 hp Perkins diesel (newly rebuilt) 0 hours after rebuild Borg Warner velvet drive transmission (newly rebuilt) 12kw Northern lights generator runs great and produces New stainless steel 17 gallon hot water heater New Splendid Washer/Dryer raymarine st60 autopilot raymarine e127 chartplotter raymarine radar New s/s propane stove, sink/faucet New countertops in galley New canvas, dodger, sailpacs. New lenses in almost all hatches. New upholstery in some many areas 2 newer AC’s (mid and aft) with new March raw water pump

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Specs

Designer
Ted Irwin
Builder
Irwin Yachts
Association
Irwin Yacht Owners
# Built
250
Hull
Monohull
Keel
Fin
Rudder
Skeg
Construction
FG

Dimensions

Length Overall
52 0 / 15.9 m
Waterline Length
170 7 / 52 m
Beam
49 2 / 15 m
Draft
16 4 / 5 m
Displacement
55,000 lb / 24,948 kg
Ballast
16,100 lb / 7,303 kg

Rig and Sails

Type
Ketch
Reported Sail Area
1,370′² / 127.3 m²
Total Sail Area
1,194′² / 110.9 m²
Mainsail
Sail Area
535′² / 49.7 m²
P
53 6 / 16.3 m
E
20 0 / 6.1 m
Air Draft
66 11 / 20.4 m
Foresail
Sail Area
659′² / 61.2 m²
I
59 3 / 18.1 m
J
22 2 / 6.8 m
Forestay Length
63 4 / 19.3 m
Mizzen
PY
31 11 / 9.8 m
EY
10 11 / 3.4 m

Auxilary Power

Make
Perkins
Model
4-236
HP
85
Fuel Type
Diesel
Fuel Capacity
?
Engine Hours
?

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?
Cabins
3

Calculations

Hull Speed
9.4 kn
Classic: 8.89 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

9.41 knots
Classic formula: 8.89 knots
Sail Area/Displacement
15.2
<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.
15.16
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
29.3
<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

29.27
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
288.3
275-350: heavy

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
288.32
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
48.0
40-50: heavy bluewater 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
47.97
<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
1.6
<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
1.61
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

A Mark II version was introduced in 1982.
The 52 was replaced by the 54 in 1988.
Keel/CB: BD: 12.3’/BU: 5.3’

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

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