Ganbare 35

Ganbare 35

Description

The Ganbare 35 is a classic IOR One Ton class racer-cruiser designed by American naval architect Doug Peterson (his breakthrough design that launched his renowned career in 1973). The original "Ganbare" was a custom-built prototype that finished 2nd at the 1973 One Ton Cup in Sardinia (despite a protest issue), proving exceptionally fast and light for its time—sparking demand for production versions. Built by Cooper Enterprises (later associated with Martin Yachts) in Canada from 1973 onward in fiberglass, with a total of 35 hulls produced (a limited run, making survivors relatively rare today). It features a fin keel with spade rudder, masthead sloop rig, and light displacement for lively, responsive performance—quick acceleration, excellent upwind pointing in a narrow "groove," strong reaching/running, but potentially tender in heavy air (requiring crew on the rail or reefing early due to IOR hull shape influences like a fine bow and flatter garboards for longer effective keel). While race-oriented, many were adapted for cruising with added amenities (e.g., larger tanks, fridge, heater), offering a practical interior (V-berth forward, saloon settees, galley, head, quarter berths sleeping 5–6) and solid build quality.

Construction Details

Designer Doug Peterson
Builder Cooper Boatworks Ltd.
Length 35.000 ft
LOA 35.400 ft
LWL 28.500 ft
Beam 11.250 ft
Displacement 13200 lb
Ballast 6500 lb
Max Draft 6.250 ft
Year Built 1973
Request A Sail Quote

The standard boat dimensions

i 47.40 ft
j 14.80 ft
p 41.70 ft
e 13.20 ft
p2 -
e2 -
i2 -
j2 -

Sails

Ganbare 35 - MAINSAIL

Luff * 41.7 ft - (12710 mm)
Foot * 13.2 ft - (4023 mm)
Leech * 43.15 ft - (13152 mm)
Tack Angle * 88.01 °
Diagonal * 43.3 ft - (13198 mm)
Head (inches) * 6 in - (152 mm)
Area 274.92 ft²
Edit in Calculator

Ganbare 35 - JIBSAIL

Luff * 39.73 ft - (12110 mm)
Foot * 19.52 ft - (5950 mm)
Leech * 34.63 ft - (10555 mm)
Percentage LP * 115 %
Length Perpendicular * 17.02 ft - (5188 mm)
Deck Angle * 12 °
Area 337.99 ft²
Edit in Calculator

Ganbare 35 - GENOA

Luff * 47.17 ft - (14377 mm)
Foot * 23.83 ft - (7263 mm)
Leech * 44.44 ft - (13545 mm)
Percentage LP * 150 %
Length Perpendicular * 22.2 ft - (6767 mm)
Deck Angle * 4 °
Area 523.51 ft²
Edit in Calculator

Ganbare 35 - SPINNAKER

Stays * 47.17 ft - (14377 mm)
MidGirth * 26.64 ft - (8120 mm)
Foot * 26.64 ft - (8120 mm)
Perc LP * 180 %
Area 1068.12 ft²
Edit in Calculator

Disclaimer. Boats are not all the same -- even when produced in the same factory of the same model. Sailrite does its best to publish accurate dimensions, but we often find it worthwhile to have our customers measure their boats carefully before we produce kits for them. You should take the same precautions, especially when the data is not from Sailrite. The information on this site is not guaranteed to be accurate. Sailrite offers this content as a service to our community, but takes no responsibility for the reliability of the data provided.

Comments

© 2025 Good Old Boat, Inc. All rights reserved