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Stellar 30
Designer: James H. Kyle  ·  Builder: Stellar Technology (Usa)  ·  First built: 1984
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About the Stellar 30

Designed by James H. Kyle and built by Stellar Technology starting in 1984, this 30-footer represents a well-balanced approach to coastal cruising and club racing. The fiberglass construction features a fin keel with transom-hung rudder configuration that provides responsive handling while maintaining structural simplicity for easier maintenance. With a displacement of 5,800 pounds and 2,000 pounds of ballast, the Stellar 30 strikes a nice middle ground between performance and stability. The masthead sloop rig carries 398 square feet of sail area, delivering a sail area-to-displacement ratio of 19.79 that suggests spirited performance without being overly aggressive. The moderate beam of 10 feet provides adequate interior volume while keeping the boat manageable for smaller crews. The comfort ratio of 15.26 indicates this boat will have a quicker motion in seaways compared to heavier cruisers, making it better suited for day sailing and coastal cruising rather than extended offshore passages. The capsize screening formula of 2.23 falls within acceptable limits for coastal sailing, though it suggests caution in heavy weather conditions. Hull speed calculations show the boat capable of 6.87 knots, while the compact 9-horsepower auxiliary engine provides reliable backup power for harbor maneuvering and calm weather motoring.

Core Dimensions
LOA (Length Overall) 29.92 ft / 9.12 m
LWL (Waterline Length) 26.25 ft / 8.00 m
Beam 10.00 ft / 3.05 m
Max Draft 5.25 ft / 1.60 m
Displacement 5,800.00 lb / 2,631 kg
Ballast 2,000.00 lb / 907 kg
Sail Area (Reported) 398.00 ft² / 36.98 m²
Design & Construction
Hull Type Fin w/transom hung rudder
Rigging Type Masthead Sloop
Construction FG
Designer James H. Kyle
Builder Stellar Technology (USA)
First Built 1984
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Performance Ratios
PHRF Rating PHRF (Performance Handicap Racing Fleet) is a national racing handicap measured in seconds per nautical mile. Lower values indicate faster boats. Ratings are sourced from US Sailing's national database (median across 60+ regional fleets).
Under 0 — Ultralight racer0–90 — Performance racer90–150 — Cruiser/racer150–210 — Typical cruiserOver 210 — Heavy/slow cruiser
 156
SA/Displacement Sail Area to Displacement ratio measures how much sail power a boat has relative to its weight. Higher values mean more performance and speed.
Under 14 — Heavy cruiser, slow14–18 — Cruising sailboat18–22 — Cruiser/racerOver 22 — Performance racer
 19.79
Ballast/Displacement Ballast to Displacement ratio shows what percentage of the boat's total weight is ballast. Higher values generally mean better initial stability and stiffer sail carrying.
30–35% — Typical cruiser35–45% — Stiff performance boatOver 45% — Racing oriented
 34.48
Displacement/Length Displacement to Length ratio measures how heavy a boat is relative to its waterline length. Lower values mean a lighter, faster boat.
Under 100 — Ultralight racer100–200 — Light cruiser/racer200–300 — Moderate cruiser300–400 — Heavy cruiserOver 400 — Very heavy
 143.15
Comfort Ratio Ted Brewer's Comfort Ratio predicts how comfortable a boat will feel in offshore conditions. Higher values mean a steadier, more comfortable motion in a seaway.
Under 20 — Uncomfortably rough20–30 — Acceptable coastal30–40 — Good offshore comfortOver 40 — Very comfortable offshore
 15.26
Capsize Screening Formula The USHS Capsize Screening Formula estimates offshore capsize risk. Lower is safer — values under 2.0 are considered acceptable for offshore sailing.
Under 2.0 — Safe for offshore2.0–2.2 — Borderline offshoreOver 2.2 — Coastal use recommended
 2.23
Hull Speed Hull Speed is the theoretical maximum speed of a displacement hull, calculated from waterline length. Most cruising sailboats reach this speed in moderate conditions. 6.87 kn
S# (Speed Number) The Speed Number (S#) is a quick performance index. Higher values indicate a faster, more powerful design relative to its size.
Under 3.0 — Slow cruiser3.0–5.0 — Average cruiser5.0–7.0 — Performance cruiserOver 7.0 — Racer
 3.87
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 937.94 pounds/inch
SA/Displacement (Calc) Calculated Sail Area to Displacement ratio using actual measured sail dimensions rather than reported values. More precise than the reported SA/Disp figure. 19.78
Rig Dimensions
I (Foretriangle Height) 36.25 ft / 11.05 m
J (Foretriangle Base) 12.00 ft / 3.66 m
P (Mainsail Luff) 30.50 ft / 9.30 m
E (Mainsail Foot) 11.83 ft / 3.61 m
SA Fore 217.50 ft² / 20.21 m²
SA Main 180.41 ft² / 16.76 m²
SA Total (100%) 397.91 ft² / 36.97 m²
Est. Forestay Length 38.18 ft / 11.64 m
Engine & Accommodations
Engine Make Yanmar
Engine Type Diesel
Horsepower 9
Fuel Capacity 12 gals / 45 L
Water Capacity 24 gals / 91 L
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