Design and Construction
The Sirius 23 has a solid-fiberglass hull, which requires only minimum maintenance during the sailing season. The standard underwater profile combines a fin keel with a skeg-hung rudder. A swing-keel version with a transom-hung rudder was also offered; its keel reduces draft to roughly two feet for shallow-water exploration and extends to just under five feet when lowered.
With a beam of 8.2 feet and a length of 23.3 feet, the Sirius 23 has a length-to-beam ratio of 2.84. That reflects the designer’s choice of a slightly wider-than-average hull. One survey rates her as roomier than 62 percent of comparable designs.
Rig and Handling
The Sirius 23 carries a masthead sloop rig with 247 square feet of sail area, giving her a sail-area-to-displacement ratio of about 20.7. The standing rigging and sheets are modestly sized. Jib and genoa sheets are about 23 feet long and 3/8 inch in diameter. The mainsheet is 58 feet long, and the spinnaker gear is 51 feet long; all are 10 mm in diameter. The estimated mainsheet length is 17.8 m.
Her displacement-to-length ratio of 155 puts her in the “light racers” category, with 73 percent of similar boats rated heavier. Theoretical hull speed is 5.95 knots.
Load sensitivity is pronounced for a boat of this size. Adding 562 pounds of gear increases immersion by one inch, something cruisers should keep in mind when loading water and provisions.
Performance Envelope
The Sirius 23’s capsize screening value is 2.37, which means she would not be accepted to participate in ocean races. Her motion comfort ratio of 11.9 is below average: she is rated more comfortable than only 24 percent of similar designs. In a seaway, she is likely to feel tender and quick rather than plush.
That same lightness gives her the lively, easily driven character associated with the “light racer” classification.
Accommodations and Auxiliary Power
The beamy hull provides more interior volume than the boat’s length might suggest, as reflected in her design ratios. A 13-gallon water tank supports short coastal cruises.
Auxiliary power comes from an 8-horsepower Farymann diesel, with a 5-horsepower option on the swing-keel model. The standard fin-keel version draws 4.1 feet. The swing keel offers draft flexibility from 2.1 to 4.9 feet.
Verdict
The Sirius 23 is a lightweight, beamy pocket cruiser. Her solid-fiberglass construction and above-average room for her size suit relaxed coastal sailing, while her capsize-screening and motion-comfort figures confirm that she is no offshore contender.
Pros
- Roomy for her length, with a length-to-beam ratio of 2.84 and more room than 62 percent of comparable boats
- Low-maintenance fiberglass hull
- Swing-keel option with draft ranging from 2.1 to 4.9 feet
- Light, easily driven “light racer” character
Cons
- Below-average motion comfort, with a rating higher than only 24 percent of similar designs
- Capsize-screening value excludes her from ocean racing
- Sensitive to load, with 562 pounds increasing immersion by one inch
