SIRIUS 21/22 (CAN)

SIRIUS 21/22 (CAN)
SIRIUS 21/22 (CAN)

Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Swing Keel
Rigging Type: Masthead Sloop
LOA: 6.40 m
LWL: 5.72 m
S.A. (reported): 19.05 m²
Beam: 2.41 m
Displacement: 907 kg
Ballast: 238 kg
Max Draft: 1.52 m
Min Draft: 0.41 m
Construction: FG
Ballast Type: Iron
First Built: 1977
Last Built: 1987
# Built: 500
Builder: Vandestadt and McGruer Ltd.
Designer: Vandestadt

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Sailboat Calculations

S.A. / Displ.: 20.71
Bal. / Displ.: 26.25
Disp: / Len: 135.45
Comfort Ratio: 10.10
Capsize Screening Formula: 2.52
S#: 4.14
Hull Speed: 5.80 kn
Pounds/Inch Immersion: 530.61 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 7.62 m
J: 2.59 m
P: 6.71 m
E: 2.74 m
S.A. Fore: 9.87 m²
S.A. Main: 9.20 m²
S.A. Total (100% Fore + Main Triangles): 19.07 m²
S.A./Displ. (calc.): 20.74
Est. Forestay Length: 8.05 m

Sailboat Links

Designers: Hubert Vandestadt
Builders: Vandestadt and McGruer Ltd. (CAN)
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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.