Boomerang 20

1968
Designer
Eric Maizey
Builder
Maison Marine (AUS)/Peninsula Yachts (AUS)
Associations
?
# Built
?
Hull Type
Swing Keel
Construction
FG

Dimensions

Length Overall
20 7 / 6.3 m
Waterline Length
18 9 / 5.7 m
Beam
7 2 / 2.2 m
Draft
0 11 / 0.3 m 4 2 / 1.3 m
Displacement
1,830 lbs / 830 kg
Ballast
530 lbs / 241 kg

Rig and Sails

Type
Fractional Sloop
Reported Sail Area
183 ft2 / 17 m2
Total Sail Area
179.4 ft2 / 16.7 m2
Mainsail
Sail Area
80.4 ft2 / 7.5 m2
P
20 8 / 6.3 m
E
7 8 / 2.4 m
Mast Height
?
Foresail
Sail Area
99 ft2 / 9.2 m2
I
23 11 / 7.3 m
J
8 3 / 2.5 m
Forestay Length
25 4 / 7.7 m

Auxilary Power

Make
?
Model
?
HP
?
Fuel Type
?
Fuel Capacity
?

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?

Calculations

Hull Speed
5.81 knots
Sail Area/Displacement
19.57
good performance
Ballast/Displacement
29.02
less stiff, less powerful
Displacement/Length
122.95
light
Comfort Ratio
10.43
lightweight racing boat
Capsize Screening
2.36
better suited for coastal cruising

Notes

One of the most popular ‘trailer sailers’ of Australia. Originally built of molded plywood.
A drop keel version was also available with slightly smaller rig.
Drop keel draft - KU: 1.0’ BD: 3.67’.
An updated version called the B63, based on the same hull but with a new deck and rig was introduced in 1986.


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