Reinke Hydra 50 Information, Review, Specs

Make
Reinke
Model
Hydra 50
Builder
Designer
Number Built

The Reinke Hydra 50 represents the pinnacle of Kurt Reinke’s philosophy: creating a virtually indestructible, go-anywhere voyaging platform that prioritizes safety and self-sufficiency over regatta-style performance. Designed primarily for aluminum or steel construction, the Hydra 50 is a quintessential long-distance blue-water cruiser, often favored by high-latitude explorers and circumnavigators. The design is most famous for its "Asymmetric Twin Keel" (AS-Keel) system, which allows the vessel to stand upright on its own during low tide—a critical feature for remote maintenance or exploring shallow estuaries. While many were professionally built, a significant portion of the global fleet was finished by skilled owners, meaning that while the hull lines remain consistent, the technical execution and interior appointments can vary significantly between hulls.

Sailing Performance & Handling

The sailing characteristics of the Hydra 50 are defined by its heavy displacement and the unique hydrodynamic properties of its twin keels. Unlike standard bilge keels, the Reinke AS-Keels are designed with an asymmetrical profile that generates lift when heeled, reducing leeway and improving upwind performance to a degree that surprises many monohull traditionalists. According to technical documentation from Reinke-Yacht, the design focuses on directional stability, allowing the boat to track reliably in heavy seas with minimal pilot intervention.

With a length overall of approximately 15 meters, the Hydra 50 is not a light-wind flyer. It requires a stiff breeze to overcome its substantial inertia, but once moving, its momentum carries it through chop that would stall lighter production boats. The steering is typically described as "deliberate" rather than "nimble." Owners often report that the boat feels most at home in a Force 5 or higher, where its high righting moment and robust rig allow it to carry full sail longer than most 50-footers. The hull’s flat sections aft and the twin-keel configuration provide exceptional stability when running downwind, significantly reducing the rhythmic rolling common in deep-draft fin keelers.

Interior Comfort & Variations

The Hydra 50 is a high-volume vessel, typically configured with a raised deck saloon or pilothouse. This design allows for a "two-level" living experience where the navigator and guests can enjoy 360-degree visibility from the safety of a sheltered interior. The layout is expansive, usually featuring three to four cabins and two heads, though the "semi-custom" nature of the Reinke builds means no two interiors are identical.

Siblings of the Hydra 50 include the slightly shortened Hydra 46 and the larger Super Hydra. The 50-foot version provides enough internal real estate for dedicated technical rooms, walk-in engine access, and vast storage lockers required for multi-year voyaging. Materials vary from utilitarian white laminates to high-end teak or cherry joinery, depending on the original builder's budget. A common trait across all variations is the emphasis on insulation; because these boats are often built in metal, builders typically employ thick foam or rockwool insulation to prevent condensation and provide thermal protection in extreme climates.

While the Reinke Hydra 50 lacks the mainstream marketing of brands like Hallberg-Rassy, it has a cult following in the German-speaking sailing community and among "hardcore" cruisers. The model is frequently featured in technical sailing journals such as Palstek and Yacht, often in the context of extreme voyages or metal boat construction. The Hydra series gained international recognition as a preferred choice for sailors planning "The Big Loop" or transits of the Northwest Passage due to its ice-handling potential when built in 8mm or 10mm aluminum.

Known Issues & Buyer’s Checklist

Prospective buyers must approach the Hydra 50 with a focus on build provenance and material integrity. Because these are metal boats, the primary "gotcha" is electrolytic corrosion. A thorough hull survey using silver-chloride reference electrodes is mandatory to ensure the hull has not been thinned by stray current.

  1. Weld Quality: On owner-finished boats, the quality of the welds—particularly around the keel joins and chainplates—must be X-ray or ultra-sound tested if documentation is lacking.
  2. Insulation Voids: Check for "sweat spots" behind cabinetry. Poorly applied insulation in a metal hull can lead to hidden corrosion from the inside out.
  3. Tankage Integration: In many Reinke designs, fuel and water tanks are integrated into the hull structure. While this adds strength, it makes cleaning or repairing a leak an industrial task.
  4. Rigging Loads: Ensure the standing rigging has been upsized appropriately; the Hydra 50 is a heavy boat that puts immense stress on its shrouds and spreaders in a blow.

Community & Resources

The most authoritative resource for this model is the official Reinke-Yacht office in Germany, which still provides plans and technical support for the Hydra series. The Reinke Eigner-Vereinigung (Reinke Owners Association) serves as a vital hub for technical exchange, offering a deep archive of modifications and solutions for the AS-Keel system.

The Verdict

The Reinke Hydra 50 is a "ship-shaped" yacht for the sailor who values autonomy and structural integrity over aesthetic trends or harbor maneuverability.

Pros:

  • Extreme Durability: The metal hull and robust design are built to survive groundings and collisions.
  • Beachable: The AS-Keel system allows for easy drying out for hull cleaning or tidal wait-outs.
  • Liveaboard Volume: Exceptional interior space and storage for long-term cruising.

Cons:

  • DIY Variability: Build quality can range from professional-grade to amateur, requiring rigorous surveying.
  • Light Wind Performance: Sluggish in breezes under 10 knots without significant sail area.
  • Maintenance: Metal hulls require constant vigilance regarding anodes and paint systems to prevent corrosion.

Measurements

Construction & Hull

Construction Material
Hull Type
— Sailboat
Keel Type
Ballast
-
Displacement
-
Water Capacity
-
Fuel Capacity
-

Dimensions

Length Overall (LOA)
-
Waterline Length (LWL)
-
Beam
-
Draft
-
Max Headroom
-
Air Draft
-
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

Rig Type
P (Main Luff)
-
E (Main Foot)
-
I (Foretriangle Height)
-
J (Foretriangle Base)
-
Forestay Length (est)
-
Sail Area
-

Calculations

Sail Area / Displacement (SA/D) Ratio
Ballast / Displacement Ratio
Displacement / Length Ratio (D/L) Ratio
Comfort Ratio
Capsize Screening Formula
Hull Speed
— kn