Seabird Half Rater

Designer
Herbert Baggs/W. Scott Hayward
Builders
?
Associations
?
# Built
100
Hull Type
Centerboard Dinghy
Construction
Wood (clinker)

Dimensions

Length Overall
20 0 / 6.1 m
Waterline Length
16 4 / 5 m
Beam
6 0 / 1.8 m
Draft
1 2 / 0.4 m 2 5 / 0.8 m
Displacement
1,970 lbs / 895 kg
Ballast
540 lbs / 245 kg
drawing

Rig and Sails

Type
Gaffhead Sloop
Reported Sail Area
182 ft2 / 16.9 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
5.41 knots
Sail Area/Displacement
18.51
good performance
Ballast/Displacement
27.37
less stiff, less powerful
Displacement/Length
202.26
moderate
Comfort Ratio
15.98
lightweight racing boat
Capsize Screening
1.91
better suited for ocean passages

Notes

The oldest one-design Class still racing in the UK (according to the ‘Guiness Book of Yachting’).
More than 40 boats were built before WWI.
Despite the fact the original plans were drawn on a cigarette pack, a thorough accounting exists for all boats built since 1899. Boat #2, built in 1899, is still sailing.(New boats can still be ordered).
The present day fleet is based at Trearddur Bay, Cardington Bay, and Abersoch and on the Mersey at Wallasey (Wales).
(Trearddur Bay Sailing Club and South Caernarvonshire Yacht Club)
An article on the SEABIRD HALF RATER can be found on Wikipedia.


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