Design and Construction
Kurt Reinke's hand is evident in a boat whose steel hull gives her real substance, and the immersion rate of about 324 kg per centimetre, or 1,814 pounds per inch, shows just how much she resists being pushed down by added gear or water. That stiffness in the waterline is paired with a length-to-beam ratio of 3.59, a proportion that reads as a moderately narrow hull by modern volume-driven standards and helps explain the calculated maximum speed of about 8.2 knots against a theoretical displacement-hull limit of 8.5 knots for her length. The wetted surface of the bottom is about 53 square metres, or 570 square feet, which is a large area to keep clean but normal for a steel cruiser of this footprint.
Rig and Handling
The sail plan is balanced toward moderate performance rather than outright pace. A sail-area-to-displacement ratio of 15.04 and a displacement-length ratio of 219, which groups her among moderate racers, suggest a boat that will move willingly in a breeze yet asks for crew effort when the wind fades. The standing and running rigging dimensions are generous: jib and genoa sheets run 14.0 metres with 16-millimetre diameter, the mainsheet stretches 35.0 metres at the same diameter, and spinnaker sheets reach 30.8 metres. Those lengths point to a large foretriangle and boom that need proper winches and careful tailing. The motion comfort ratio of 40.3 and a capsize screening value of 1.59 describe a hull that favours steadiness and reserve stability over snap reactivity.
Accommodations
Below, the Hydra SC is equipped with seven berths, a count that supports a crewed passage or a family cruising layout with spare capacity for guests. The steel hull and the immersion behaviour noted above mean that this berth count is delivered within a hull that tolerates the weight of mattresses, tankage, and stores without sagging appreciably at the waterline.
The Verdict
The Hydra SC is a steel cruiser for the sailor who values structural honesty and load-carrying calm over sparkling acceleration. Her numbers describe a moderate-racer displacement hull with a comfort-oriented motion profile, and her seven berths make her a practical platform for extended crewed cruising. The trade-off is the maintenance burden and weight penalty of steel, plus the sailing feel of a boat whose wetted surface and immersion rate demand respect in light air.
Pros
- Steel hull with high immersion resistance for loaded cruising
- Seven berths for crewed or family passage making
- Moderate-racer DL ratio with a comfort-oriented motion figure
Cons
- Large wetted surface and heavy immersion rate temper light-air performance
- Steel construction carries weight and upkeep penalties versus glass or alloy
