Blanchard Knockabout SR.

1935
Designer
Ben Seaborn
Builder
Blanchard Boat Co.
Associations
?
# Built
97
Hull Type
Fin with rudder on skeg
Construction
Wood Planked

Dimensions

Length Overall
25 11 / 7.9 m
Waterline Length
20 11 / 6.4 m
Beam
6 5 / 2 m
Draft
3 6 / 1.1 m
Displacement
2,500 lbs / 1,134 kg
Ballast
1,200 lbs / 544 kg (Iron)
drawing

Rig and Sails

Type
Fractional Sloop
Reported Sail Area
250 ft2 / 23.2 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
?

Calculations

Hull Speed
6.14 knots
Sail Area/Displacement
21.72
high performance
Ballast/Displacement
48.0
stiffer, more powerful
Displacement/Length
120.51
light
Comfort Ratio
14.1
lightweight racing boat
Capsize Screening
1.92
better suited for ocean passages

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