The Storm were mainly sold as kits and flew in the ultralight or experimental categories, depending on the jurisdiction.
The aircraft is a low-wing, all metal design using a 100 hp (70 kW) Rotax 912UL-S engine.
The Century was initially fitted with an "all flying" combination horizontal stabiliser and elevator.
Subsequently, as part of the development of the Century RG – a retractable gear variant – the vertical stabiliser and empennage was subtly redesigned and the horizontal tail surfaces were replaced by a conventional fixed horizontal stabiliser/elevator combination.
A further development of the Century involved adding 25 cm to the length of the aircraft forward of the firewall (by way of a modified engine mount) and 15 cm to the aircraft immediately aft of the original cockpit.