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Seller's Description

Length 30’ Mainhead Sloop Beam 10’ Draft 5’ Displacement 8,600 pounds US Coast Guard Certificate of Documentation Equipment: Mainsail, Roller Furling Jib, new windows, interior redone 5yrs ago, Sleeps 6, V-berth forward with storage under and hanging lockers, separate head with shower, sink and vanity top. Next is the main salon table converts the settle to port into a double berth, straight settee to starboard. Storage lockers are behind and below both settees. Quarter berth with window aft. To port is a U-shaped galley, with an alcohol 2 burner stove with oven, microwave, built-in ice chest and sink with pressure water. Equipment: Mainsail, roller furling jib, inboard 13 hp Yanmar Diesel with wheel, safety gear, swim ladder, dock lines, fenders, shore power, 2 battery banks, battery charger, batteries new in 2014. Fresh bottom paint 2016, Sunbrella sail cover, helm covers, full winter cover, all in good condition, hatch cover with screen/screen, Bimini top.

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Specs

Designer
Joseph McGlasson
Builder
Islander / Tradewind Yachts
Associations
?
# Built
?
Hull
Monohull
Keel
Fin
Rudder
?
Construction
FG

Dimensions

Length Overall
29 7 / 9 m
Waterline Length
98 5 / 30 m
Beam
32 9 / 10 m
Draft
16 4 / 5 m
Displacement
8,400 lb / 3,810 kg
Ballast
2,900 lb / 1,315 kg

Rig and Sails

Type
Sloop
Reported Sail Area
355′² / 33 m²
Total Sail Area
355′² / 33 m²
Mainsail
Sail Area
178′² / 16.6 m²
P
28 6 / 8.7 m
E
12 6 / 3.8 m
Air Draft
?
Foresail
Sail Area
177′² / 16.5 m²
I
32 9 / 10 m
J
10 9 / 3.3 m
Forestay Length
34 6 / 10.5 m

Auxilary Power

Make
Universal
Model
Atomic 4
HP
?
Fuel Type
Gas
Fuel Capacity
?
Engine Hours
?

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?
Cabins
?

Calculations

Hull Speed
6.8 kn
Classic: 6.47 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

6.8 knots
Classic formula: 6.47 knots
Sail Area/Displacement
13.8
<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.
13.75
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
34.5
<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

34.51
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
295.4
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
295.43
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
28.1
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
28.13
<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
1.7
<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
1.74
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

The ISLANDER 30 is a raised deck version of the ISLANDER 29.
Replaced with an entirely different ISLANDER 30 in 1970. (ISLANDER 30-2).

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

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