The Niki 2004 is a family of

Bulgaria Bulgaria (; bg, България, Bǎlgariya), officially the Republic of Bulgaria,, ) is a country in Southeast Europe. It is situated on the eastern flank of the Balkans, and is bordered by Romania to the north, Serbia and North Macedo ...

autogyro An autogyro (from Greek and , "self-turning"), also known as a ''gyroplane'', is a type of rotorcraft that uses an unpowered rotor in free autorotation to develop lift. Forward thrust is provided independently, by an engine-driven propeller. Whi ...

s, designed and produced by

Niki Rotor Aviation Niki Rotor Aviation is a Bulgarian aircraft manufacturer based in Pravets. The company specializes in the design and manufacture of autogyros in the form of kits for amateur construction.Bayerl, Robby; Martin Berkemeier; et al: ''World Directory ...

Pravets Pravets or Pravetz ( bg, Правец, also transliterated as Pravec, ) is a town in Pravets Municipality in central western Bulgaria, located approximately from the capital Sofia. Pravets is home town of Pravetz computers. Pravets has a populat ...

. The aircraft is supplied as a kit for amateur construction or as a complete ready-to-fly-aircraft.Bayerl, Robby; Martin Berkemeier; et al: ''World Directory of Leisure Aviation 2011-12'', page 184. WDLA UK, Lancaster UK, 2011. ISSN 1368-485X

Design and development

The Niki 2004 features a single main rotor, a two-seats-in

side-by-side configuration Tandem, or in tandem, is an arrangement in which a team of machines, animals or people are lined up one behind another, all facing in the same direction. The original use of the term in English was in ''tandem harness'', which is used for two ...

enclosed cockpit,

tricycle landing gear Tricycle gear is a type of aircraft undercarriage, or ''landing gear'', arranged in a tricycle fashion. The tricycle arrangement has a single nose wheel in the front, and two or more main wheels slightly aft of the center of gravity. Tricycle g ...

and a four-cylinder, air-cooled, four-stroke, single-ignition

Subaru EJ22 The Subaru EJ engine is a series of four-stroke automotive engines manufactured by Subaru. They were introduced in 1989, intended to succeed the previous Subaru EA engine. The EJ series was the mainstay of Subaru's engine line, with all engines ...

auto-conversion engine in pusher configuration. The aircraft

fuselage The fuselage (; from the French ''fuselé'' "spindle-shaped") is an aircraft's main body section. It holds crew, passengers, or cargo. In single-engine aircraft, it will usually contain an engine as well, although in some amphibious aircraf ...

is made from

monocoque Monocoque ( ), also called structural skin, is a structural system in which loads are supported by an object's external skin, in a manner similar to an egg shell. The word ''monocoque'' is a French term for "single shell". First used for boats, ...

aluminum Aluminium (aluminum in American and Canadian English) is a chemical element with the symbol Al and atomic number 13. Aluminium has a density lower than those of other common metals, at approximately one third that of steel. It ha ...

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 diameter and a chord of . The 2004M model has an empty weight of and a gross weight of , giving a useful load of .

Variants

;2004 :Original version with a gross weight of , a fuselage length of and a cruise speed of . ;2004M :Stretched version with a fuselage length of and a cruise speed of . ;2008 :Improved version with a gross weight of , a fuselage length of and a cruise speed of .

Specifications (2004M)

References

External links

* {{Niki Rotor aircraft 2004 2000s Bulgarian sport aircraft Homebuilt aircraft Single-engined pusher autogyros Vehicles introduced in 2004