THUNDERBIRD

THUNDERBIRD insignia THUNDERBIRD drawing

Sailboat Specifications


Hull Type:
Fin w/spade rudder
Rigging Type:
Fractional Sloop
LOA:
25.98 ft / 7.92 m
LWL:
20.25 ft / 6.17 m
S.A. (reported):
309.00 ft2 / 28.71 m2
Beam:
7.54 ft / 2.30 m
Draft (max):
4.79 ft / 1.46 m
Draft (min):
Displacement:
3,650 lb / 1,656 kg
Ballast:
1,530 lb / 694 kg
S.A./Disp.:
20.91
Bal./Disp.:
41.92
Disp./Len.:
196.23
Construction:
Plywood/FG
Ballast Type:
First Built:
1958
Last Built:
# Built:
Builder:
Designer:
Ben Seaborn
Website:

Sailboat Calculations

S.A./Disp.:
20.91
Bal./Disp.:
41.92
Disp./Len.:
196.23
Comfort Ratio:
17.40

Rig and Sail Particulars

I:
26.75 ft / 8.15 m
J:
8.00 ft / 2.44 m
P:
31.00 ft / 9.45 m
E:
13.00 ft / 3.96 m
SPL/TPS:
ISP:
S.A. Fore:
107.00 ft2 / 9.94 m2
S.A. Main:
201.50 ft2 / 18.72 m2
S.A. Total (100% Fore + Main Triangles)
308.50 ft2 / 28.66 m2
S.A./Disp. (calc.):
20.88
Est. Forestay Len.:
27.92 ft / 8.51 m

Sailboat Links

Designers:

Notes

Some THUNDERBIRDS have been built of molded FG with aluminum spars. A "cruising deck" design was introduced. Most have been built from plans now supplied by the class association. See the class web site for details.



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