Regent’s 30-Second Viceroy Flight Starts Final Tests for 2027 Production

Regent Craft has flown its full-size Viceroy seaglider with two crew members aboard, moving the Rhode Island startup from hydrofoil trials into the final stage of sea testing for an unusual electric vehicle that operates as both vessel and aircraft. The inaugural crewed flight lasted 30 seconds over Narragansett Bay and reached the craft’s intended operating height of 33 feet, or about 10 meters, above the water.

The short flight demonstrated that the full-scale prototype could become airborne and remain in wing-in-ground-effect flight with people aboard. It did not, by itself, establish the endurance, reliability or regulatory compliance needed for passenger service. Regent is targeting the end of 2027 for its first production vehicles to leave the manufacturing line, making the expanded test campaign and U.S. Coast Guard certification process the critical work between this milestone and delivery.

Regent subsequently completed a second flight lasting about one minute, according to The Air Current. That progression illustrates the deliberate expansion expected in prototype testing: collect data during a tightly bounded run, review vehicle behavior and then increase exposure. Longer flights are useful, but the broader challenge is proving repeatable operation across all three of the Viceroy’s modes.

One vehicle, three operating regimes

The Viceroy begins as a boat, moving away from a dock on its hull. As speed rises, submerged hydrofoils lift the hull above the water, reducing hydrodynamic drag. The foils then retract as the vehicle takes off and climbs to approximately one wingspan above the surface.

At that low altitude, interaction between the wing’s airflow and the water surface reduces induced drag and increases lift compared with flight outside ground effect. Twelve propellers distributed along the wing also provide blown lift by accelerating air over the lifting surfaces. Regent CEO and co-founder Billy Thalheimer says this configuration improves efficiency relative to a boat and extends usable battery range, although no independent performance data was provided.

The engineering issue is not simply whether each mode works separately. A production vehicle must manage the transitions between displacement operation, hydrofoiling and aerodynamic flight in changing marine conditions. The hydrofoils, their retraction system, the electric propulsion system and the flight controls must work as an integrated vehicle rather than as loosely connected maritime and aviation subsystems.

That integration also shapes maintenance. Saltwater exposure, repeated water loading and the demands placed on retractable foils sit alongside aircraft-like requirements for distributed electric propulsion and control-system integrity. Regent says a triple-redundant digital control system manages stability autonomously, allowing certified mariners to command basic direction and speed. Expanded testing will have to support the reliability and inspection framework behind that operating concept.

Coast Guard certification sets a different path

U.S. regulations classify the Viceroy as a flying boat, placing certification under the Coast Guard rather than the Federal Aviation Administration. Regent expects the FAA to participate in a technical advisory role. Certified mariners, rather than licensed pilots, are intended to operate the vehicle.

That structure may avoid a conventional aircraft type-certification program, but it does not make approval automatic. The Coast Guard-led process must address a vehicle combining high-voltage electric propulsion, hydrofoils, retracting hardware, automated controls and sustained operation just above water. The coordination with the FAA matters because much of the Viceroy’s design behavior including lift, stability and distributed propulsion is aeronautical even though its legal and operational framework is maritime.

Regent intends the 12-passenger Viceroy to supplement or replace some coastal ferry and airline services, citing potential routes such as Boston to Nantucket and Miami to the Bahamas. Those remain proposed applications, not operating services. Analyst Sergio Cecutta expects the initial commercial market to be constrained because seagliders would supplement ferries and replace only some island helicopter routes, with broader opportunities depending on larger vehicles.

A factory exists, but production readiness must be earned

Regent has completed a 255,000-square-foot manufacturing facility in Rhode Island with space for structural assembly, wing and hydrofoil integration, battery and systems installation, and water-based testing. Direct waterfront access supports sea trials and reduces the logistical friction of moving completed vehicles to their operating environment.

The facility gives Regent industrial capacity, but the design configuration, certification basis and test findings will determine how quickly that capacity can become a repeatable production system. Prototype changes made during expanded trials can affect tooling, supplier requirements, inspection procedures and technician training.

Thalheimer said Regent expects its first vehicles to come off the line by the end of 2027 and is working with the Coast Guard to support that schedule. After a 30-second first flight and a one-minute follow-up, the decisive milestone is no longer merely getting Viceroy airborne. It is showing that the hull-to-hydrofoil-to-flight sequence can be repeated safely and maintained economically enough to support certification and serial production.

By David Whitaker — Associate editor for AMI’s aerospace and drone systems desk, translating flight systems, aircraft programs, spaceflight, and UAV developments into accessible technical stories.