Master the elements. On your own terms.
Sailing at high speeds is an indescribable pleasure. Endless surfs, overwhelming apparent wind, powerful wave slicing. This thrill, however, fades as yachts grow in size, burdened by crew requirements, complex planning, and heavy logistics. This dominant model no longer suits everyone.
We believe there’s another way to sail: more exclusive, more intimate, more intense.
Faster than a powerboat. More distinctive than a yacht. Simpler than both.
The OSA 50 was designed with a clear intention: to set off instantly and sail fast to reach a bay, an island, or a secluded cove within the hour. No waiting, no delegation. Just you, the wind, and the destination.
It’s a different way of experiencing the sea. Brief. Dense. Direct.
A machine always ready, sharp, ultra-performing, yet manageable. Delivering a unique emotional connection to the ocean.
The name is a tribute to Osa Johnson and her husband Martin Johnson, pioneering aviators of the 1930s.
They personally flew their iconic compact seaplanes, the “Spirit of Africa” and “Borneo”, living a life defined by clarity of decision, spontaneous departures, and the joy of lightness. While others flew first-class, they piloted their own aircraft with elegance, heading toward their own personal paradise.
That spirit inspired this new creation.
From offshore legends to personal weapon.
Designing record-breaking sailing yachts able to sail around the globe in 40 days or cross the Atlantic in three has pushed the boundaries of what a single sailor can achieve at sea. In that pursuit, we’ve explored the limits of high-speed solo sailing on highly demanding machines.
From that experience, we’ve distilled simplicity, functionality, and technical efficiency.
The foiling yachts we’re developing today for major offshore races now incorporate proven technologies that mark a true turning point:
-Flight control systems capable of maintaining a stable pitch in all sea conditions
-Predictive autopilots, optimizing routing and maneuvers with more precision than an Olympic medalist
-Autonomous hydraulic units, quietly managing operations without the need for human intervention
These technologies have matured. They’re now available to gentleman sailors.
The OSA 50 doesn’t try to do it all. It proudly embraces its purpose: to offer one owner the freedom to sail whenever they want, with full control of a high-performance machine tailored for ultra-short-range exploration.
Design language of flight.
The design of the OSA 50 follows a guiding principle central to our approach: bringing the performance logic and form intelligence of offshore racing into a personal cruising yacht.
The hull and deck result from a combined work of hydrodynamics and aerodynamics. Once speeds exceed 35 knots and the boat lifts onto its foils, air resistance becomes just as critical as hydrodynamic drag.
The lines are shaped by the wind, taut profiles, clean surfaces, and seamless integration of crossbeams. “Karman junction” are found throughout the structure, a concept well known in aeronautics for smoothing airflow at junctions between volumes. This approach was historically developed on the iconic Spitfire and has since evolved through our offshore racing work.
The aft section continues this thinking: an elongated, continuous design reminiscent of shooting brakes or the famous seaplane Spirit of Adventure. This isn’t a stylistic indulgence it increases the aspect ratio of the central hull, optimizes interior volume without widening the beam, and creates a sheltered living space ideal for today's ultra-fast sailing. This type of protected hull is already used on our offshore platforms, such as Ultim trimarans.
On this latest design, we’ve introduced a new architectural choice: an inverted coachroof—lower than the trimaran’s beams.
This decision is driven by several key logics:
– A sleeker overall silhouette
– An improved aerodynamic penetration coefficient
– A stronger endplate effect between boom and deck
This reversed roofline is neither provocation nor rupture; it’s a rational continuation of our pursuit of efficiency, aligned with the targeted level of performance.
Historically, sailing yacht superstructures have followed visible cycles. Early generations of modern cruising yachts featured high, bulky coachroofs—symbols of comfort and generous interior space. Later, racing introduced the flush deck—clean lines, minimal structures—a visual marker of performance.
Natural evolution, driven by use cases and validated by data, led us to rethink the status quo.
The gentleman’s foiler
The architecture of the OSA 50 draws directly from offshore racing technologies, adapted for private use without crew—or with a minimal one. The platform is designed for minimal drag while foiling, a smooth transition into partial flight, and structural stability at high speeds. The shift from displacement mode to foiling happens seamlessly, with no perceptible change in behavior for the helmsman, and in wind conditions that are easy to access. These characteristics are achieved not through brute power, but through aerodynamic efficiency and an optimized weight-to-drag ratio.
The deliberately modest rig is designed to operate under apparent wind, with controlled loads. In a true wind of 20 knots, the boat can reach 30 knots of boat speed at a 15° apparent wind angle. This generates an apparent wind of 37 knots, which becomes the boat’s real driving force. If the boat slows down or if the apparent wind drops, the system automatically returns to a safe configuration—without emergency maneuvers or active sail reduction. This protects the sailor while allowing speeds in the 35–38 knot range under standard conditions.
This behavior is made possible by the use of “skimming” foils, designed to generate lift without fully exiting the water. This intentional compromise eliminates the risks of full flight while significantly reducing drag. An optional flight controller automatically manages ride height and lateral stability, reducing workload at high speed.
An active central appendage, integrated beneath the main hull’s daggerboard, completes the system. Nicknamed the “stingray wing,” this foil can be dynamically adjusted to generate upward or downward force. It serves a dual purpose: stabilizing pitch at medium frequency, and absorbing gusts. Acting as a dynamic, inertia-free ballast, it contributes significantly to the boat’s safety. This system is already in use on our offshore racing yachts and finds a new application here, adapted to a 50-foot platform.
We believe performance isn’t a result of raw power—it's the outcome of carefully balanced forces.
The material palette reflects the same level of precision and intention: walnut in a reinterpreted traditional finish, paired with brushed black aluminum surfaces, featuring sharp radii and perfectly aligned joints. Handle-free assemblies, rounded edges, and mitre cuts all express a high level of craftsmanship drawing equally from French modernist furniture and functional aeronautical design. The metal, raw and precise, is never decorative. It evokes technical cabins, cockpits, and environments built to endure.
This approach echoes the legacy of the Bauhaus: form distilled down to function, aesthetics born of constraint, with use as the primary driver of design. The influence is clear but never pastiche. It’s filtered through a contemporary design culture that of the engineer-craftsmen, capable of merging technical expertise with a tactile understanding of materials. The human hand is visible because machines cannot produce the unique or the one-off. What is industrial belongs to the masses.
The central canopy of the OSA 50 does far more than bring light into the cabin; it is a structural element in its own right. Engineered to absorb longitudinal torsion between the trimaran’s crossbeams, it contributes directly to the yacht’s overall stiffness. By doing so, it frees up other architectural elements and unlocks greater design freedom for the interior.
This logic draws from monocoque aircraft design, where glazed surfaces are used not just to let light in, but to actively bear loads. The result here is both technical and visually legible: a canopy framed like a capsule, part of a deliberate aesthetic that celebrates precision, performance, and transparency.
Beyond its structural function, the canopy transforms the onboard experience. It opens space, dissolves the boundary between roof and interior, and bathes the living area in natural light. Its seamless, flush integration supports smooth airflow, free from visual clutter or protrusions.
Composite, when treated correctly, is a noble material: light, strong, and complex. A matte veil may soften it, but never hides it. It remains legible. Its partial, controlled presence speaks volumes: this is a yacht born from racing DNA.
This approach echoes the ethos of the New Material Research Laboratory: a respect for raw material properties, and a refusal to erase them through over-finishing. Like the Bauhaus before it, this is about crafting with both technical mastery and human touch. Surfaces aren’t decorated but revealed. Veneers and composites are selected for their expressive textures. A natural grain captures light, casts soft shadows, and slows the perception of form.
No gimmicks, no showmanship. Just a refined, direct, and enduring way to inhabit the sea with the precision of a racing yacht, and the soul of a handcrafted object.
