Seller's Description
1979 Irwin 30 Sailboat, shoal C/B keel. This boat has undergone a serious refit 2 years ago in preparation for island cruising. In 2018 my wife and I spent 3 months cruising the Bahamas, it was a perfect trip aboard a perfect boat! This boat is extremely well equipped with all the standard upgrade items for cruising. To name a few: Dodger/Bimini with rainfly, mainsail stack-pack, roller furling jib, Custom SS dual anchor bow sprit, 200w solar, dinghy davits, SS stern boarding ladder, Yanmar 3GM30F, upgrade 80a alternator, custom built-in refrigeration 4” foam insulation, LED lighting throughout, All lines led to cockpit with new rope clutches, the list goes on…
https://sailboatdata.com/sailboat/irwin-30
Equipment: Sails/Rigging: Full Batten Mainsail (like new) 135% RF Jib (Like new) Symetrical Spinnaker with Snuffer sock & Spin pole (fair condition perfect for cruising) Asym or Drifter with Snuffer sock (older but excellent condition) Furlex Furler Selden Mast & Boom with Jiffy reefing standing rigging Self Tailing 2spd jib sheet winches 2 spd halyard winches
Electronics/Electrical: Garmin 547XS Chartplotter with WiFi, AIS receive, radar ready (network connection to VHF & Autopilot for AIS targets/alarms and auto-route) Garmin BlueChart G2 - US & Bahamas Standard Horizon GX2200 VHF, Shakespear 3’ mastop whip, RG-213 Coax Raymarine ST2000 autopilot Stereo w/bluetooth, cockpit and cabin speakers All new marine grade “tinned” copper wiring throughout All new marine grade electrical components/switches/lighting etc. Dedicated-isolated Start Battery, (1) Grp-24 marine starting Dedicated-isolated House Battery bank, (4) Grp-24 marine deepcycle 200w solar with Renogy controller Small 12v/110VAC inverter to run power tool or charge laptop
Engine: Completely rebuilt & installed 2yrs ago Yanmar 3GM30F PYI dripless shaft seal New Prop Michigan Wheel 12x17P RH 3-blade New AL fuel tank w/electric sending unit Racor Filter Excellent Access through removable engine box, Sound Down marine insulation keeps the engine quiet
Cabin/Galley: All new cushions & covers, V-berth foam is memory foam from and IKEA mattress Main cabin berths have lee cloths Plenty of storage for 3months food/drink provisioning for Bahamas Built-in galley fridge with cold plate, 4 foam insulation, insulated lid with tight gasket seal Force-10 Propane Range with new burners, Magma grill with tank connection 14lb Propane tank, stern rail mounted (lasted more than 3 months cooking aboard almost everyday) 40gal Fresh water tank, pressure water throughout, charcoal filter, cockpit shower 2 folding tables perfect size for cabin or cockpit dinner Manual Head, 8gal holding tank, macerator & deck pump out All through hull fittings & ball valves replaced All hoses replaced 800 GPH auto/manual bilge pump (water witch sensor) Manual Whale bilge pump
Ground Tackle: Primary Bow Anchor = 22lb Lewmar plow, 80’ 5/16” BBB chain & swivel 75’ 1/2” 3-strand nylon rope Secondary Bow Anchor = 25lb Danforth, 60’ 5/16” BBB chain & swivel 75’ 1/2” 3-strand nylon rope Extra shackle for quick easy “Bahamian Moore” system Chain snuber & chafe guards
Dinghy/Outboard/Trailer are available, but not included in the $14,100 price
**Dinghy: Zodiac Fiberglass RHIB 3.1m (with title) Mercury 3hp 2stroke outboard (extremely lightweight)
**Sailboat Trailer: Custom built trailer with adjustable jack stands welded to the trailer frame Tandem 8 lug axles Electric brakes on all 4 wheels All lights work, highway ready, spare tire included
Specs
- Designer
- Ted Irwin
- Builder
- Irwin Yachts
- Association
- Irwin Yacht Owners
- # Built
- ?
- Hull
- Monohull
- Keel
- Fin
- Rudder
- Skeg
- Construction
- FG
Dimensions
- Length Overall
- 29′ 11″ / 9.1 m
- Waterline Length
- 98′ 5″ / 30 m
- Beam
- 33′ 5″ / 10.2 m
- Draft
- 13′ 9″ / 4.2 m
- Displacement
- 9,200 lb / 4,173 kg
- Ballast
- 4,100 lb / 1,860 kg
Rig and Sails
- Type
- Sloop
- Reported Sail Area
- 474′² / 44 m²
- Total Sail Area
- 474′² / 44 m²
Mainsail
- Sail Area
- 192′² / 17.9 m²
- P
- 35′ 0″ / 10.7 m
- E
- 10′ 11″ / 3.4 m
- Air Draft
- 45′ 6″ / 13.9 m
Foresail
- Sail Area
- 281′² / 26.1 m²
- I
- 41′ 8″ / 12.7 m
- J
- 13′ 5″ / 4.1 m
- Forestay Length
- 43′ 9″ / 13.4 m
Auxilary Power
- Make
- ?
- Model
- ?
- HP
- ?
- Fuel Type
- ?
- Fuel Capacity
- ?
- Engine Hours
- ?
Accomodations
- Water Capacity
- ?
- Holding Tank Capacity
- ?
- Headroom
- ?
- Cabins
- 1
Calculations
- Hull Speed
-
8.1 kn
Classic: 6.95 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
- Sail Area/Displacement
-
17.3
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.
- Ballast/Displacement
-
44.6
>40: stiffer, more 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
- Displacement/Length
-
210.2
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
- Comfort Ratio
-
23.1
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
- 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
Notes
Shoal draft version: 3.92’.
Keel/CB draft: BU:4.3’ BD: 8.3’
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