IMPULSE 21

IMPULSE 21 photo IMPULSE 21 drawing

Sailboat Specifications


Hull Type:
Fin w/spade rudder
Rigging Type:
Fractional Sloop
LOA:
21.00 ft / 6.40 m
LWL:
18.50 ft / 5.64 m
Beam:
8.00 ft / 2.44 m
S.A. (reported):
208.00 ft2 / 19.32 m2
Draft (max):
3.25 ft / 0.99 m
Displacement:
1,300 lb / 590 kg
Ballast:
600 lb / 272 kg
S.A./Disp.:
28.00
Bal./Disp.:
46.15
Disp./Len.:
91.66
Construction:
FG
First Built:
1986
# Built:
150
Builder:
Impulse Marine / Johnson Boatworks (USA)
Designer:
William Cook
Website:
groups.yahoo.com/group/Impulse21sailors

Sailboat Calculations

S.A./Disp.:
28.00
Bal./Disp.:
46.15
Disp./Len.:
91.66
Comfort Ratio:
6.54
Capsize Screening Formula:
2.93
S#:
6.11

Rig and Sail Particulars

I:
23.10 ft / 7.04 m
J:
7.00 ft / 2.13 m
P:
26.00 ft / 7.92 m
E:
9.70 ft / 2.96 m
SPL/TPS:
8.00 ft / 2.44 m
ISP:
23.50 ft / 7.16 m
S.A. Fore:
80.85 ft2 / 7.51 m2
S.A. Main:
126.10 ft2 / 11.72 m2
S.A. Total (100% Fore + Main Triangles)
206.95 ft2 / 19.23 m2
S.A./Disp. (calc.):
27.85
Est. Forestay Len.:
24.14 ft / 7.36 m

Notes

Also called the Impulse Eagle.
Thanks to 'Warren' for providing updated information.

Sailboat Forum


.