Welcome to the Gweduck Amphibian Flying-boat!

The Gweduck is a twin engine, flying-boat style amphibian of composite construction built in the Experimental category.  It is styled along the lines of the successful Grumman amphibious aircraft. The original Gweduck was designed in the 1990's and the prototype has been flying since 2009.

Now with over 1400 flying hours on the prototype airframe, the Gweduck has begun production as a kit-built aircraft!  For more information on the Gweduck Kit Aircraft, please fill out our questionnaire (Click Here). 


The Gweduck design project was started to recreate a Grumman Widgeon, but instead, uses composite materials to eliminate the extensive corrosion and maintenance problems so common to most amphibious designs. Over time, the project developed into a ground-up redesign into a completely new aircraft that combines the knowledge and experience of 1940's & 50's flying boat designs with modern composite construction, and the latest in aerodynamic and hydrodynamic technologies. 

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Ellison - Mahon Aircraft, Inc.
Renton, WA
USA