The Calidus features a single main rotor, a two-seats in tandem enclosed cockpit with a complete aerodynamic cockpit fairing, tricycle landing gear with wheel pants and a four-cylinder, air and liquid-cooled, four-stroke, dual-ignition 100 hp Rotax 912 engine or turbocharged 115 hp Rotax 914 engine in pusher configuration.
The aircraft fuselage is made from composites and is a faired teardrop shape to ensure smooth airflow over the variable pitch pusher propeller. Its 27.6 ft diameter rotor has a chord of 7.9 in. The aircraft has an empty weight of 584 lbs and a max gross weight of 990 lbs, giving a useful load of 408 lbs. The design incorporates vibration dampers that greatly reduce the level of main rotor vibration transmitted to the cockpit.
The design is noted for both its cruise speed of 99 mph and range of 500 miles. It was the basis for the later side-by-side configuration model of the AutoGyro, named the Cavalon