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Seller's Description

1981 Irwin 40’ (12.19m) CITATION - VAYU Call, Sean Kiaer 206-325-7700 for information and showing appointments. Seller a retired Yacht Builder, Marine Engineer and Surveyor bought larger boat and is motivated to sell this beautifully rebuilt from keel up 1981 Irwin 40 Citation. ORIENTAL North Carolina United

$ 50,000 USD € 46,136 Euros $ 71,537 CAD

Description 1981 Irwin 40 Citation

Strength, Durability & Performance Ted Irwin designed and built the Citation 40 that one could easily compare to the Bill Lapworth designed Cal 40, or the Bob Perry designed Valiant 40, for their Strength, Durability & Performance. Ted Irwin truly designed one of the top racer/cruiser class of boats with the Citation 40. This boat design really brings out the best of the older style boats, both in performance and in looks. Current owner gets many comments about her good looks. This Irwin 40 is blue water ready with little work needed for your offshore adventures. Just stepping on to Vayu, you get the sense of how solidly built she is. Vayu has been rebuilt over the years by a professional boat builder, marine engineer, and retired yacht surveyor after he purchased her in 2006. After purchasing another boat he is now ready to move on and let someone else enjoy the efforts of his labor. Meticulously maintained by the current owner, he has truly done a remarkable job of upgrading and maintaining Vayu.

There is an immense amount of storage for one that my want to cross oceans or sail the Caribbean, or take extended cruises away from civilization. Storage has been greatly increased over that of your average production boat. THIS IS A MUST SEE.

Data Sheet LOA: 40’ “ (12.19 Meters) Type: Sail - Used Year: 1981 Beam: 12’ “ Bridge Clearance: 54’ “ Draft Max: 5’ 6” Cabins: 3 Sleeps: 6 Heads: 1 Maximum Speed: 7.5 Knots Cruise Speed: 6 Knots Fuel Type: Diesel Hull Material: Fiberglass Fuel Tank: 40 Gallons (151.42 Liters) Fresh Water: 100 Gallons (378.54 Liters) Holding Tank: 20 Gallons (75.71 Liters)

Full Details

Mechanical & Electrical Engine: Yanmar, HP: 27 Engine Model: 3QM30 Serial: 82146 Hours: 5000+/- (Estimated) Cruising Speed: 6 kts. @ 1,600 Max Speed: 7 kts. Oil Filter: Yanmar 124550-35110 Fuel Filter: Yanmar 104500-55710, Racor: 500 FG Zinc: Yanmar 27210-200300, 1-1/8” shaft. Raw water strainer: Groco SA1 Fuel Pump: 12 VDC Alternator: Balmar 100 amp with Aqualine Plus 3 stage regulator

Transmission: Kanzaki, Kokyukoki Mfg. Model: KH18, 2.03, 2:1 RH Serial: AR1672, Oil: AFT-A

Propeller: Shaft: Stainless steel 1-1/8” X 54” Replaced 2020 Prop Shaft seal: PSS Face seal. New 2020 Cutlass Bearing: 1-5/8” X 4-1/2” X 1-1/8” Replaced 08/25/2010. Propeller: 3 Blade Bronze, 16RH12 Steerage:

Rudder Shaft Seal: 3/16” flax packing. Rudder lower bearing replaced 2012 Rudder removed and repaired as needed 2020 Charging Systems:

Engine Drive: Balmar 100 Amp on BEP 150 amp combiner. Solar Panels: (2) 64watt BP/solarex. Wind Generator: (2) AIRwind 12 VDC. Shore Chargers: Heart Inverter/charger 2000 watt, Xantrex Truecharge 40 amp (11/2018.) Batteries: (1) Series 24 (2023) (4) Trojan T105 6 volt in two 12 volt banks (New 07/2021)

Electronics: DEPTH SOUNDER: Raymarine ST60 (2009). Transducer offset 2’4” SPEED LOG: Raymarine ST60. WIND AWI: Standard Horizon WS150 (2020) VHF: Icom IC-M502(bought used 6/2012) with command Mic II (New 2012) STEREO: Clarion CMD4 with Helm remote. (2006) RADAR: Raymarine RD18 (bought used 6/2020) #1 PLOTTER: Raymarine E127 (brought used 9/2020) #2 PLOTTER: Raymarine E90 (bought used 6/2022) #1 Auto pilot: Raymarine ST5000 with wheel drive. #2 Autopilot: Raymarine with Raymarine linear drive Salon TV: Element 24” LCD TV, 12 VDC (2015) Forward TV: ByDesign 9” LCD TV/DVD/AM/FM/CD, Modeld:886 (2006) Single Sideband: Icom IC-M710, Antenna tuner Icom IC 130 (bought used 6/2019) INVERTER: Heart Interface Model 81-2011-12 (Aug 07), 12VDC/120 VAC 2 KW with remote. New control boards 04-2019 Battery Charger: Xantrex True Charge 40 amp (Used 2019) HEAT/AC:

Salon: Mermaid1600 Reverse Cycle. New 2019 120 VDC 14 AMP Ser # Pump March AC-5C-MD, 120 VAC Forward: MarineAir 6000 BTU 2020 Pump March AC-5C-MD, 120 VAC

Deck Hardware: Portlights: (4) aft Newfound metals, (6) Man Ship SS. Deck Hatches: (4) 1/2” Lexan, new gaskets 2010 Stanchions and Rails: 1” welded stainless steel tube. 3/16” Life lines.

WINCHES: (2) ASAHI #30, 2 speed self tailing, (2) Lewmar #30 2 speed.

CONTROL WINCHES: (1) Barlow #19 single speed, (1) Lewmar #8 single speed,

HALYARD WINCHES: (2) Barlow #16 single speed.

Spars, Rigging & Sails: Mast: Hood Stowaway in mast furling main. Total mast length 55’ Main Furling: Hood line drive. Hood in mast Stowaway Main luff hoist 43’-3” Main Boom: Z Spar 17’ Jib Furling: Harken MK II Spinnaker Pole: Aluminum Standing Rigging: Stainless Steel 5/16” 1x19 New 2006 Forestay: 1 X 19 306 stainless steel 5/16” X 51’, 5/8” pin, 5/8” turnbuckle thread. (2006) Backstay: 1 X 19 306 stainless steel 5/16” X ,5/8” pin, 5/8” turnbuckle thread. (2006)

Sails: Jib: Luff 47’-8”, Foot 16’ Hoist #6 luff tape Working Jib: l-45’-6”, f-17’ Staysail: Luff 34-6”, foot 10’ Mainsail: In mast furling. 43’-2” Luff, Foot 16’ Genoa Track 1-1/4” I= 50.00, Height of headstay termination above the sheer line J= 16.5, Distance between the headstay termination at the deck and the front of the mast at the sheer line. P= 44.0, Distance between black bands on the mast, or the maximum luff length of the main. E= 14.80, Distance between black bands on the boom, or the maximum foot length of the main

Interior Accommodations: Sleeps 6 Cabins: 3. Main Salon, V-Berth and Aft Stateroom Heads/Bathrooms: 1.0 Bathroom Layout: Bathroom With standup Shower

GALLEY: Stove: Seaward princess LPG, 3 burner with oven. In fair condition. Open ventilation. 2, 10 lb propane cylinders in propane locker. MICROWAVE OVEN: 120 VAC. In good condition. (2018) Grill: Magma Standard size, Propane.

Refrigeration: Compressor (2) Adler Barbour CU100 12 VDC 2008, 134a Freon 2020 Evaporator Adler Barbour VD-160 Cold Plate 2006, Condenser 2020 Upgrades Ultra suede headliner, and LED lighting trough out. Solid surface counter tops, though out. New cushions, covers, with memory foam mattresses. Many custom cabinets increasing storage capacity though out the boat. High quality Amtico Vinyl Flooring though out. Plumbing upgrades, with poly tubing and upgraded fixtures. Wiring upgrades, through out to meet ABYC standards 2000-watt Heart inverter/Charger. Additional 40-amp battery charger as back up. 900 watts Solar, with Two 300 Watt Wind Generators. New upgraded custom electrical panels. Two 30-amp 120 VAC shore power inlets. 16k AC in salon new in 2019. New 6k air conditioner in forward cabin and salon new in 2021. New Deisel heater in 2021. Two Adler Barbour 12-volt refrigeration with new refer box. Pur 80 water maker. Newer Raymarine electronics with E127 plotter with radar. E90 plotter at nav station. Raymarine below deck autopilot and separate wheel pilot as backup. Icom VHF with helm remote Icom 710 SSB. Standard Horizon AWI. Engine is Yanmar 3QM30 27 HP approximately 5000 hours. Runs good no oil leaks. New fuel tank replaced in 2024.

Specs

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

Dimensions

Length Overall
40 8 / 12.4 m
Waterline Length
31 2 / 9.5 m
Beam
12 1 / 3.7 m
Draft
6 2 / 1.9 m
Displacement
16,890 lb / 7,661 kg
Ballast
?

Rig and Sails

Type
Masthead Sloop
Reported Sail Area
738′² / 68.6 m²
Total Sail Area
738′² / 68.6 m²
Mainsail
Sail Area
326′² / 30.3 m²
P
43 11 / 13.4 m
E
14 9 / 4.5 m
Air Draft
?
Foresail
Sail Area
412′² / 38.3 m²
I
49 10 / 15.2 m
J
16 4 / 5 m
Forestay Length
52 9 / 16.1 m

Auxilary Power

Make
Yanmar
Model
3QM30
HP
27
Fuel Type
Diesel
Fuel Capacity
40 gal / 151 l
Engine Hours
5000

Accomodations

Water Capacity
100 gal / 379 l
Holding Tank Capacity
20 gal / 76 l
Headroom
?
Cabins
3

Calculations

Hull Speed
8.3 kn
Classic: 7.48 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

8.29 knots
Classic formula: 7.48 knots
Sail Area/Displacement
17.9
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.
17.94
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
?

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

?
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
249.0
200-300: 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
249.03
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
27.3
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
27.27
<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
1.9
<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
1.9
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

See IRWIN 39 CITATION which appears very similar.
Fixed keel shoal draft: 4.39’
Keel/cb: BU: 4.25’/BD: 7.0’

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