1985 — 1987
Designer
Rod Johnstone
Builder
J Boats
Association
IOR 3/4 ton
# Built
25
Hull
Monohull
Keel
Fin
Rudder
Spade
Construction
FG

Dimensions

Length Overall
33 11 / 10.4 m
Waterline Length
25 11 / 7.9 m
Beam
11 2 / 3.4 m
Draft
6 2 / 1.9 m
Displacement
8,100 lb / 3,674 kg
Ballast
3,400 lb / 1,542 kg (Lead)

Rig and Sails

Type
Sloop
Reported Sail Area
505′² / 46.9 m²
Total Sail Area
505′² / 46.9 m²
Mainsail
Sail Area
228′² / 21.2 m²
P
37 11 / 11.6 m
E
12 0 / 3.7 m
Mast Height
?
Foresail
Sail Area
277′² / 25.8 m²
I
43 11 / 13.4 m
J
12 7 / 3.8 m
Forestay Length
45 9 / 14 m

Auxilary Power

Make
Volvo
Model
?
HP
18
Fuel Type
Diesel
Fuel Capacity
?

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?
Cabins
?

Calculations

Hull Speed
6.83 knots
Sail Area/Displacement
20.03
high performance
Ballast/Displacement
41.98
stiffer, more powerful
Displacement/Length
205.74
moderate
Comfort Ratio
17.52
lightweight racing boat
Capsize Screening
2.23
better suited for coastal cruising

Notes

Designed as IOR 3/4 ton level racer.

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