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Knutson 35
Designer: Sparkman & Stephens  ·  Builder: Thomas Knutson Shipbuilding  ·  First built: 1955
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About the Knutson 35

With limited documentation available, the Knutson 35 represents one of the more elusive designs in the 35-foot sailing yacht category. This relative obscurity likely stems from a smaller production run, making it a rare find in today's used boat market. Based on its name and era, this sailboat appears to have emerged during the classic fiberglass boom years when many smaller manufacturers were creating capable coastal cruisers. The 35-foot length suggests a boat designed for comfortable weekend cruising and extended coastal passages, striking that sweet spot between manageable size and reasonable accommodations. Without extensive specification data, potential buyers should approach any Knutson 35 with thorough surveying in mind, particularly given the limited parts availability and service network that often accompanies lesser-known manufacturers. However, this scarcity can also work in favor of those seeking a unique vessel that won't be found in every marina. The boat's appeal likely lies in its potential for customization and the satisfaction of owning something uncommon. Prospective owners should expect to rely on general marine suppliers rather than manufacturer-specific parts, making mechanical aptitude and self-reliance valuable traits for anyone considering this distinctive sailboat.

Core Dimensions
LOA (Length Overall) 35.00 ft / 10.67 m
LWL (Waterline Length) 25.00 ft / 7.62 m
Beam 9.83 ft / 3.00 m
Max Draft 4.83 ft / 1.47 m
Displacement 17,000.00 lb / 7,711 kg
Ballast 5,360.00 lb / 2,431 kg
Sail Area (Reported) 571.00 ft² / 53.05 m²
Design & Construction
Hull Type Fin Keel
Rigging Type Fractional Sloop
Construction Wood
Designer Sparkman & Stephens
Builder Thomas Knutson Shipbuilding
First Built 1955
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
195
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
13.87
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
44.7
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
1.53
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. 6.7
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
0.66
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. 878.09
Rig Dimensions
I (Foretriangle Height) 44.0
J (Foretriangle Base) 13.0
P (Mainsail Luff) 38.0
E (Mainsail Foot) 15.0
SA Fore 286.0
SA Main 285.0
How It Compares

vs. Dickerson 35, Spencer 35 Mk I, Week Ender Ss

This boat Similar boats
Dimensions
LOA
Knutson 35 ★
35.0 ft
Dickerson 35
35.0 ft
Spencer 35 Mk I
35.0 ft
Week Ender Ss
35.0 ft
LWL
Knutson 35 ★
25.0 ft
Dickerson 35
26.8 ft
Spencer 35 Mk I
25.0 ft
Week Ender Ss
27.0 ft
Beam
Knutson 35 ★
9.8 ft
Dickerson 35
10.4 ft
Spencer 35 Mk I
9.5 ft
Week Ender Ss
9.5 ft
Displacement
Knutson 35 ★
17 lbs
Dickerson 35
12 lbs
Spencer 35 Mk I
12 lbs
Week Ender Ss
16 lbs
Ballast
Knutson 35 ★
5 lbs
Dickerson 35
4 lbs
Spencer 35 Mk I
4 lbs
Week Ender Ss
6 lbs
Performance
PHRF Rating (lower = faster)
Knutson 35 ★
195 s/nm
Dickerson 35
204 s/nm
Spencer 35 Mk I
Week Ender Ss
Ballast / Disp (higher = stiffer)
Knutson 35 ★
Dickerson 35
33.3 %
Spencer 35 Mk I
35.0 %
Week Ender Ss
41.6 %
Displacement / Length (lower = lighter)
Knutson 35 ★
Dickerson 35
277
Spencer 35 Mk I
342
Week Ender Ss
368
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