Development and Design Philosophy
David B. Thurston, the legendary amphibian designer behind the Colonial Skimmer and TSC-1 Teal, conceived the TA-16 Seafire in the late 1970s with a specific mission profile in mind. The aircraft needed to fly 434 nautical miles outbound, collect a 500-pound load, and return without refueling—a capability that would serve remote operators, charter services, and recreational pilots requiring true amphibious versatility. Thurston's design incorporated lessons learned from decades of amphibian development, including his patented aileron system (US Patent 3,598,340) and innovative hull configurations.
The prototype, registered N16TA, took to the skies on December 10, 1981, marking the beginning of a development program that would span decades. Thurston's design featured a steep 'V' hull with strakes capable of handling two-foot chop, addressing one of the primary limitations of earlier amphibians in rough water conditions.
Technical Innovation
The TA-16 incorporates several advanced features that distinguish it from contemporary amphibians. The NACA 64A215 laminar flow wing section, mounted in a constant-chord mid-wing configuration with 3 degrees of dihedral and 4 degrees of incidence, provides efficient cruise performance exceeding 140 knots. The wings feature upturned tips and house the main landing gear, which retracts inward using a 69-bar hydraulic system.
The single-step planing hull construction uses corrosion-resistant Alclad aluminum, offering durability advantages over composite alternatives while maintaining reasonable manufacturing costs. Composite materials are strategically employed only for wingtips and floats, balancing weight savings with structural requirements.
Powering the Seafire is a Textron Lycoming IO-540-E4A5 flat-six engine producing 260 horsepower, driving either a Hartzell or MT-Propeller 80-inch constant-speed propeller. The cabane-mounted tractor configuration provides excellent propeller clearance from water spray while maintaining center-of-gravity control. Alternative powerplants include the SMA 230 turbo-diesel offering 35 percent greater range, and the modern DeltaHawk DHK4A235 capable of operating on sustainable aviation fuel.
The Thurston Legacy
Thurston Aeromarine Corporation traces its lineage to David Thurston's Colonial Aircraft Corporation, established in 1946 to produce the C-1 and C-2 Skimmer amphibians. These designs evolved into the successful Lake LA-4 series under different ownership, while Thurston continued developing the TSC-1 Teal through his own company formed around 1971. When Schweizer Aircraft ended Teal production in 1975, Thurston began focusing on the TA-16 project.
Thurston built the prototype personally in 1982, demonstrating the hands-on approach that characterized his entire career. The company sold 70 sets of plans to homebuilders, with seven aircraft completed by 2002 under Experimental category registration. Two of these homebuilts achieved first and second place honors in the Custom Plans-Built category at EAA AirVenture Oshkosh 1998.
Production Challenges and Progress
Unlike Thurston's previous designs that achieved full certification, the TA-16 has faced extended development timelines. FAR Part 23 certification reached approximately 85 percent completion by 2002, with ongoing efforts continuing into the 2020s. The prototype underwent refurbishment and certification trials in 2002 under Seagull Aviation Parts in Wisconsin, while development rights eventually transferred to Aquastar Inc., which re-registered the prototype on July 28, 2000.
Serial Number 002 (assembly 81-001) accumulated 130.2 total airframe hours during certification testing, providing valuable data for the approval process. Current pricing reflects the aircraft's positioning as a premium amphibian: complete aircraft cost approximately $300,000, while kit versions were offered at $65,000, or $130,000 with factory assembly assistance in DeLand, Florida.
Performance and Capabilities
The TA-16's performance specifications meet its design objectives, with cruise speeds exceeding 140 knots and range surpassing 1,000 nautical miles from its 90-US-gallon fuel capacity housed in wing leading-edge tanks. Takeoff performance requires 1,000 feet on land or 1,200 feet on water at maximum takeoff weight, while the aircraft can clear a 50-foot obstacle in these same distances. The 44-knot stall speed and climb rate exceeding 1,000 feet per minute provide comfortable margins for amphibious operations.
The four-seat cabin accommodates 1,200 pounds of useful load, making the aircraft practical for both recreational and light commercial applications. The 24-volt electrical system includes a 70-ampere alternator and 37-ampere-hour battery, while hydraulic systems operate the retractable gear including 6.00-6 main wheels with oleo-pneumatic shock absorption.
Current Status and Future
Thurston Aeromarine Corporation remains active under its original name, promoting the Seafire with modern propulsion options and emphasizing its certification progress. The company's focus on durability and utility continues David Thurston's philosophy of creating amphibians that serve real-world missions safely and economically. While production numbers remain limited compared to Thurston's earlier designs, the TA-16 represents the culmination of five decades of amphibian development expertise, positioned to serve the growing market for versatile aircraft capable of accessing both improved and unimproved airports as well as suitable waterways.