Designed by David Thomas and built by Marine Projects Ltd. in the UK starting in 1979, this 36-footer represents solid British yacht design philosophy of the late 1970s. The Sigma 36 Thomas combines respectable performance with comfortable cruising capabilities, making it well-suited for coastal sailing and extended offshore passages. With a moderate displacement of 12,350 pounds and a fin keel with spade rudder configuration, the boat strikes a practical balance between stability and sailing performance. The fractional sloop rig carries 605 square feet of sail area, providing adequate power while remaining manageable for a small crew. Her 28.75-foot waterline length delivers a theoretical hull speed of 7.18 knots, making her competitive in club racing while comfortable for cruising. The comfort ratio of 23.86 indicates this yacht leans toward the performance end of the spectrum while still providing reasonable accommodation for extended voyaging. Her capsize screening value of 1.99 falls within acceptable parameters for offshore sailing, though coastal and near-shore cruising remain her primary strengths. The fiberglass construction and proven David Thomas design have helped many examples remain seaworthy decades after launch, earning respect among sailors seeking a capable, well-built cruiser-racer.
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What is the Sigma 36 Thomas's sail area to displacement ratio?
The Sigma 36 Thomas has a Sail Area to Displacement ratio (SA/D) of 18.18. Values between 14–18 are typical cruising sailboats; 18–22 is cruiser/racer; over 22 is performance racing.
What is the Sigma 36 Thomas's comfort ratio?
The Sigma 36 Thomas has a Ted Brewer Comfort Ratio of 23.86. A ratio over 30 indicates good offshore comfort; over 40 is very comfortable offshore.
Is the Sigma 36 Thomas safe for offshore sailing?
The Sigma 36 Thomas has a Capsize Screening Formula value of 1.99. Values under 2.0 are considered acceptable for offshore sailing; under 1.8 is ideal.
What is the hull speed of the Sigma 36 Thomas?
The theoretical hull speed of the Sigma 36 Thomas is 7.18 kn knots, calculated from its waterline length.
How much does a Sigma 36 Thomas weigh?
The Sigma 36 Thomas has a displacement of 12,350.00 lb and a length overall (LOA) of 36.00 ft.
Who designed the Sigma 36 Thomas?
The Sigma 36 Thomas was designed by David Thomas, first built in 1979.