The Watson WG-1 Windwagon is a single-seat recreational ultralight designed in the United States in 1976 and marketed for homebuilding.
[1] The Windwagon is a low-wing cantilever monoplane of conventional design with fixed, tricycle undercarriage, and a single-seat open cockpit.
[1] The outer wing panels are removable to facilitate hangering and trailering.
[1][3][4] Power is supplied by an air-cooled, tractor-mounted piston engine driving a propeller.
[1] By 1987, Watson had sold over 1,025 sets of plans, and over 500 Windwagons had been built around the world.