The FP-404 was designed by Fisher Aircraft in the United States in 1984 and was the company’s first design that was too heavy for the US FAR 103 Ultralight Vehicles category, with the category’s maximum 254 lb (115 kg) empty weight. The 404’s standard empty weight is 275 lb (125 kg) when equipped with a two-stroke 50 hp (37 kW) Rotax 503 engine, putting it into the US experimental-amateur-built category, although it qualifies as an ultralight in other countries, such as Canada. The design goal was to provide a nostalgic aircraft reminiscent of the biplanes of the 1930s, as the company explains “The FP-404 represents a reborn era in airborne adventure. This bi-plane aircraft is a throw-back to seat-of-the-pants flying, complete with minimal instruments and bare-necessity controls.