The Mace-Trefethen Seamaster is an American single seat

seaplane A seaplane is a powered fixed-wing aircraft capable of takeoff, taking off and water landing, landing (alighting) on water.Gunston, "The Cambridge Aerospace Dictionary", 2009. Seaplanes are usually divided into two categories based on their tech ...

racer.

Design and development

The Seamaster was built by Alfred and Thomas Trefethen and Harvey Mace, using components from the

PAR Special The PAR Special was a high-speed experimental monoplane built by a consortium of aviation engineers, and competed in air races in the early 1950s. Design and development The Special was a project of four St. Louis-based McDonnell Aircraft emp ...

pusher monoplane. It is a single place,

mid-wing A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple wings. A monoplane has inherently the highest efficiency and lowest drag of any wing config ...

seaplane with a Y tail layout and a single

fuselage The fuselage (; from the French language, French ''fuselé'' "spindle-shaped") is an aircraft's main body section. It holds Aircrew, crew, passengers, or cargo. In single-engine aircraft, it will usually contain an Aircraft engine, engine as wel ...

-mounted float. The pusher propeller configuration of the PAR Special was modified to that of a conventional tractor layout.

Specifications (Seamaster)

References

{{reflist, refs= {{cite journal, journal=Air Trails, title=Seamaster, date=Summer 1971, page=40 {{cite web , last=Fortier , first=Rénald , title=Do you remember Joan Trefethen? I do, I do!, Part 1 , url=https://ingeniumcanada.org/channel/articles/do-you-remember-joan-trefethen-i-do-i-do-part-1 , website=ingeniumcanada.org , publisher=Ingenium Channel , date=November 27, 2017 , access-date=May 25, 2025 {{cite journal , journal=Sport Aviation , title=Mace-Trefethen "Seamaster", date=January 1968 , volume=17 , number=1 , page=32 , publisher=Experimental Aircraft Associaton, Inc , location=Hales Corner, WI 1960s United States sport aircraft Floatplanes Mid-wing aircraft Racing aircraft Single-engined tractor aircraft