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Wianno Senior
Designer: H. Manley Crosby  ·  Builder: Crosby Yacht Building And Storage Co.  ·  First built: 1913
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About the Wianno Senior

Steeped in New England sailing tradition, the Wianno Senior is one of America's most storied one-design keelboats, with roots stretching back to 1914 on the waters of Nantucket Sound off Cape Cod. Designed by H. Manley Crosby, this gaff-rigged classic was built to handle the demanding coastal conditions of the Northeast, and it has been doing so with distinction for well over a century. The Senior is synonymous with the Kennedy family, who raced the class enthusiastically off Hyannis Port, lending the boat a cultural cachet that few sailboats can claim. Beyond its famous associations, it has earned genuine respect as a wholesome, seaworthy daysailer and club racer ideally suited to protected coastal waters. Its traditional construction and graceful lines reflect an era of honest, purposeful design, and the active one-design fleet ensures competitive racing opportunities for those drawn to that heritage experience. For a buyer seeking a boat with deep historical roots, a passionate community, and rewarding coastal sailing character, the Wianno Senior offers something increasingly rare — a living piece of American sailing history.

Core Dimensions
LOA (Length Overall) 25.00 ft / 7.62 m
LWL (Waterline Length) 17.60 ft / 5.36 m
Beam 8.00 ft / 2.44 m
Max Draft 5.50 ft / 1.68 m
Min Draft 2.50 ft / 0.76 m
Displacement 4,100.00 lb / 1,860 kg
Ballast 1,200.00 lb / 544 kg
Sail Area (Reported) 366.00 ft² / 34.00 m²
Design & Construction
Hull Type Keel/Cbrd.
Rigging Type Gaffhead Sloop
Construction Wood or FG
Designer H. Manley Crosby
Builder Crosby Yacht Building and Storage Co.
First Built 1913
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Performance Ratios
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
22.92
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
20.03
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
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. 5.62
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. 503.09
How It Compares

vs. Cape Dory 25D, Catalina 25, Rhodes Idler, Seafarer Herreshoff, Vertue

This boat Similar boats
Dimensions
LOA
Wianno Senior ★
25.0 ft
Cape Dory 25D
25.0 ft
Catalina 25
25.0 ft
Rhodes Idler
25.0 ft
Seafarer Herreshoff
25.0 ft
Vertue
25.0 ft
LWL
Wianno Senior ★
17.6 ft
Cape Dory 25D
19.0 ft
Catalina 25
21.5 ft
Rhodes Idler
20.0 ft
Seafarer Herreshoff
21.5 ft
Vertue
21.5 ft
Beam
Wianno Senior ★
8.0 ft
Cape Dory 25D
8.0 ft
Catalina 25
8.8 ft
Rhodes Idler
8.0 ft
Seafarer Herreshoff
7.8 ft
Vertue
7.2 ft
Displacement
Wianno Senior ★
4 lbs
Cape Dory 25D
5 lbs
Catalina 25
4 lbs
Rhodes Idler
6 lbs
Seafarer Herreshoff
3 lbs
Vertue
9 lbs
Ballast
Wianno Senior ★
1 lbs
Cape Dory 25D
2 lbs
Catalina 25
1 lbs
Rhodes Idler
1 lbs
Seafarer Herreshoff
Vertue
4 lbs
Sail Area
Wianno Senior ★
366 sq ft
Cape Dory 25D
304 sq ft
Catalina 25
254 sq ft
Rhodes Idler
Seafarer Herreshoff
344 sq ft
Vertue
395 sq ft
Performance
PHRF Rating (lower = faster)
Wianno Senior ★
Cape Dory 25D
234 s/nm
Catalina 25
223 s/nm
Rhodes Idler
Seafarer Herreshoff
Vertue
SA / Displacement (higher = more powerful)
Wianno Senior ★
22.9
Cape Dory 25D
16.4
Catalina 25
16.1
Rhodes Idler
Seafarer Herreshoff
23.9
Vertue
14.1
Ballast / Disp (higher = stiffer)
Wianno Senior ★
Cape Dory 25D
40.0 %
Catalina 25
37.5 %
Rhodes Idler
21.7 %
Seafarer Herreshoff
Vertue
Comfort Ratio (higher = more comfortable offshore)
Wianno Senior ★
20.0
Cape Dory 25D
23.8
Catalina 25
15.2
Rhodes Idler
Seafarer Herreshoff
15.7
Vertue
47.7
Capsize Screening (lower = safer)
Wianno Senior ★
2.00
Cape Dory 25D
1.86
Catalina 25
2.21
Rhodes Idler
Seafarer Herreshoff
2.04
Vertue
1.35
Displacement / Length (lower = lighter)
Wianno Senior ★
Cape Dory 25D
333
Catalina 25
179
Rhodes Idler
334
Seafarer Herreshoff
Vertue
Hull Speed
Wianno Senior ★
5.6 kts
Cape Dory 25D
5.8 kts
Catalina 25
6.2 kts
Rhodes Idler
Seafarer Herreshoff
6.2 kts
Vertue
6.2 kts
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