Alden O Class MK I

1922 — 1925
Designer
John G. Alden
Builders
?
Associations
?
# Built
20
Hull
Monohull
Keel
Centerboard
Rudder
?
Construction
Wood

Dimensions

Length Overall
18 2 / 5.6 m
Waterline Length
15 5 / 4.7 m
Beam
6 2 / 1.9 m
Draft
0 11 / 0.3 m 3 8 / 1.1 m
Displacement
1,300 lb / 590 kg
Ballast
450 lb / 204 kg

Rig and Sails

Type
Sloop
Reported Sail Area
200′² / 18.6 m²
Total Sail Area
?
Mainsail
Sail Area
?
P
?
E
?
Mast Height
?
Foresail
Sail Area
?
I
?
J
?
Forestay Length
?

Auxilary Power

Make
?
Model
?
HP
?
Fuel Type
?
Fuel Capacity
?

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?
Cabins
?

Calculations

Hull Speed
5.28 knots
Sail Area/Displacement
26.87
high performance
Ballast/Displacement
34.62
less stiff, less powerful
Displacement/Length
155.85
light
Comfort Ratio
10.83
lightweight racing boat
Capsize Screening
2.26
better suited for coastal cruising

Notes

Alden design #61. It is thought that no more than 20 of this first version of the O Class were built. Designed as a trainer, it proved to be too tender and skitish for the younger sailer and they had died out by 1931. A second version (see ALDEN O MK II) proved to be far more popular.

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