The Swallow was designed to comply with the Fédération Aéronautique Internationale microlight category, including the category's maximum gross weight of 4500NaN0. The aircraft is a "cozy" two seater, with the occupants both sitting very close together.
The Swallow features a cable-braced hang glider-style high-wing, weight-shift controls, a two-seats-in-tandem open cockpit with a cockpit fairing, tricycle landing gear and a single engine in pusher configuration.
The aircraft carriage structure is made from welded stainless steel tubing, with its single surface wing covered in Dacron sailcloth. Its 10.41NaN1 span wing is supported by a single tube-type kingpost and uses an "A" frame weight-shift control bar. The powerplant is a twin cylinder, air-cooled, two-stroke, dual-ignition 500NaN0 Rotax 503, with the liquid-cooled 640NaN0 Rotax 582 engine optional. Main landing gear suspension is provided. The aircraft has an empty weight of 1310NaN0 and full fuel capacity of .
The standard wings offered with the basic carriage were the La Mouette Ipsos series, in wing areas of 12, 14, 16 and 16.9 square metres.