Sirius 21/22

1977 — 1987
Designer
Hubert Vandestadt
Builder
Vandestadt and McGruer Ltd.
Associations
?
# Built
500
Hull Type
Swing Keel
Construction
FG

Dimensions

Length Overall
20 11 / 6.4 m
Waterline Length
18 9 / 5.7 m
Beam
7 10 / 2.4 m
Draft
1 4 / 0.4 m 4 11 / 1.5 m
Displacement
2,000 lbs / 907 kg
Ballast
520 lbs / 238 kg (Iron)
drawing

Rig and Sails

Type
Masthead Sloop
Reported Sail Area
205.1 ft2 / 19.1 m2
Total Sail Area
205.3 ft2 / 19.1 m2
Mainsail
Sail Area
99 ft2 / 9.2 m2
P
22 0 / 6.7 m
E
8 11 / 2.7 m
Mast Height
?
Foresail
Sail Area
106.2 ft2 / 9.9 m2
I
25 0 / 7.6 m
J
8 5 / 2.6 m
Forestay Length
26 4 / 8.1 m

Auxilary Power

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

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?

Calculations

Hull Speed
5.8 knots
Sail Area/Displacement
20.66
high performance
Ballast/Displacement
26.25
less stiff, less powerful
Displacement/Length
135.45
light
Comfort Ratio
10.04
lightweight racing boat
Capsize Screening
2.51
better suited for coastal cruising

Notes

Vandestadt & McGruer was the Canadian importer of the American built MacGregor line of trailerable sailboats in early 1970s. The company also built the SIREN 17.
The SIRIUS 21/22 is said to be the first North American production-built, ballasted cruising boat with positive flotation. In a more expensive procedure, closed-cell foam was injected into some compartments, then into the gap between the inner and outer hull the full length and up to the deck level.
In the early 1980s, the hull was modified to include a reverse sheer transom at which point the boat was renamed the SIRIUS 22.
A fixed-keel model was also offered.


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