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Kappa San 35

Designer: Mcinnis  ·  Builder: International Marine Japan Ltd.  ·  First built: 1950
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About the Kappa San 35

With limited specifications available in sailing databases, the Kappa San 35 represents one of those intriguing sailboats that requires deeper investigation for prospective buyers. This 35-foot vessel appears to be part of a smaller production run or potentially a regional design that hasn't achieved widespread documentation in mainstream boating resources. Based on its size classification, the Kappa San 35 would typically fall into the coastal cruising and weekend sailing category, offering enough space for comfortable short-term cruising while remaining manageable for smaller crews. Boats in this length range often balance performance with livability, making them suitable for both day sailing and extended coastal passages. The relative scarcity of detailed information suggests this model may have been produced by a smaller shipyard or represents a limited production series. For potential buyers, this could mean either discovering a hidden gem with unique characteristics, or facing challenges with parts availability and resale value. Anyone considering a Kappa San 35 should prioritize a thorough marine survey and research into the builder's reputation, construction methods, and any owner communities that might provide insights into the boat's real-world performance and maintenance requirements.

Core Dimensions
LOA (Length Overall) 34.83 ft / 10.62 m
LWL (Waterline Length) 25.62 ft / 7.81 m
Beam 10.00 ft / 3.05 m
Max Draft 4.71 ft / 1.44 m
Displacement 14,119.00 lb / 6,404 kg
Sail Area (Reported) 594.00 ft² / 55.18 m²
Design & Construction
Hull Type Long Keel
Rigging Type Masthead Sloop
Construction Wood
Designer McInnis
Builder International Marine Japan Ltd.
First Built 1950
Owner Reviews

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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
201
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
16.33
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
35.8
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
1.66
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. 6.78
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
1.18
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. 915.43
Rig Dimensions
I (Foretriangle Height) 44.0
J (Foretriangle Base) 12.1
P (Mainsail Luff) 38.3
E (Mainsail Foot) 15.7
SA Fore 266.2
SA Main 300.66
How It Compares

vs. Alberg 35, Baba 35, Cheoy Lee 35, Freedom 33, Hallberg Rassy 352

This boat Similar boats
Dimensions
LOA
Kappa San 35 ★
34.8 ft
Alberg 35
34.8 ft
Baba 35
34.8 ft
Cheoy Lee 35
34.8 ft
Freedom 33
34.8 ft
Hallberg Rassy 352
34.8 ft
LWL
Kappa San 35 ★
25.6 ft
Alberg 35
24.0 ft
Baba 35
29.6 ft
Cheoy Lee 35
27.1 ft
Freedom 33
30.0 ft
Hallberg Rassy 352
28.6 ft
Beam
Kappa San 35 ★
10.0 ft
Alberg 35
9.7 ft
Baba 35
11.2 ft
Cheoy Lee 35
11.2 ft
Freedom 33
11.0 ft
Hallberg Rassy 352
11.1 ft
Displacement
Kappa San 35 ★
14 lbs
Alberg 35
12 lbs
Baba 35
21 lbs
Cheoy Lee 35
14 lbs
Freedom 33
12 lbs
Hallberg Rassy 352
14 lbs
Ballast
Kappa San 35 ★
Alberg 35
5 lbs
Baba 35
8 lbs
Cheoy Lee 35
5 lbs
Freedom 33
3 lbs
Hallberg Rassy 352
6 lbs
Sail Area
Kappa San 35 ★
594 sq ft
Alberg 35
Baba 35
758 sq ft
Cheoy Lee 35
565 sq ft
Freedom 33
516 sq ft
Hallberg Rassy 352
600 sq ft
Performance
PHRF Rating (lower = faster)
Kappa San 35 ★
201 s/nm
Alberg 35
201 s/nm
Baba 35
192 s/nm
Cheoy Lee 35
183 s/nm
Freedom 33
141 s/nm
Hallberg Rassy 352
SA / Displacement (higher = more powerful)
Kappa San 35 ★
16.3
Alberg 35
Baba 35
15.9
Cheoy Lee 35
15.4
Freedom 33
15.8
Hallberg Rassy 352
16.0
Ballast / Disp (higher = stiffer)
Kappa San 35 ★
Alberg 35
42.1 %
Baba 35
37.8 %
Cheoy Lee 35
36.4 %
Freedom 33
31.7 %
Hallberg Rassy 352
44.8 %
Comfort Ratio (higher = more comfortable offshore)
Kappa San 35 ★
35.8
Alberg 35
Baba 35
42.2
Cheoy Lee 35
30.2
Freedom 33
24.2
Hallberg Rassy 352
30.5
Capsize Screening (lower = safer)
Kappa San 35 ★
1.66
Alberg 35
Baba 35
1.62
Cheoy Lee 35
1.84
Freedom 33
1.93
Hallberg Rassy 352
1.81
Displacement / Length (lower = lighter)
Kappa San 35 ★
Alberg 35
406
Baba 35
364
Cheoy Lee 35
321
Freedom 33
198
Hallberg Rassy 352
282
Hull Speed
Kappa San 35 ★
6.8 kts
Alberg 35
Baba 35
7.3 kts
Cheoy Lee 35
7.0 kts
Freedom 33
7.3 kts
Hallberg Rassy 352
7.2 kts
Speed Number (higher = faster)
Kappa San 35 ★
1.2
Alberg 35
Baba 35
1.3
Cheoy Lee 35
1.5
Freedom 33
Hallberg Rassy 352
1.8
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