Niki 2004

The Niki 2004 is a family of Bulgarian autogyros, designed and produced by Niki Rotor Aviation of Pravets. The aircraft is supplied as a kit for amateur construction or as a complete ready-to-fly-aircraft.

Design and development
The Niki 2004 features a single main rotor, a two-seats-in side-by-side configuration enclosed cockpit, tricycle landing gear and a four-cylinder, air-cooled, four-stroke, single-ignition 150 hp Subaru EJ22 auto-conversion engine in pusher configuration.

The aircraft fuselage is made from monocoque aluminum sheet, with a steel rotor mast and the twin tails supported by aluminium tubing. The series uses American-made Vortech and SportCopter rotor blades with a 9.14 m diameter and a chord of 20 cm. The 2004M model has an empty weight of 350 kg and a gross weight of 550 kg, giving a useful load of 200 kg.

Variants

 * 2004
 * Original version with a gross weight of 450 kg, a fuselage length of 3.90 m and a cruise speed of 130 km/h.


 * 2004M
 * Stretched version with a fuselage length of 4.225 m and a cruise speed of 130 km/h.


 * 2008
 * Improved version with a gross weight of 450 kg, a fuselage length of 4.225 m and a cruise speed of 150 km/h.