The Nielsen & Winther Type AA was a Danish fighter aircraft of the 1910s manufactured by Nielsen & Winther in Copenhagen.

The first Danish fighter aircraft to be conceived and built, the single seat Type AA was of wooden construction and powered by a 90 hp Thulin rotary engine. It was armed with one 8 mm Madsen machine gun.

The first flight took place on 21 January 1917. The plane was tested again in 1918, this time with synchronising gear for its single Madsen machine gun. During 1917 six Type AA aircraft were delivered to the Danish Army, though they saw little service and were retired in 1919 owing to engine unreliability.

• Type AB
  • Two-seat reconnaissance version, prototype
• Type AC
  • Floatplane version of the Type AA, prototype

 Denmark

• Danish Army (Royal Danish Army Air Corps)

 Norway

• Royal Norwegian Air Force

• Danmarks Flyvemuseum, Helsingør: Replica Type AA^[1]

Data from Green^[2]

General characteristics

• Crew: 1
• Length: 6.60 m (21 ft 8 in)
• Wingspan: 7.70 m (25 ft 3.13 in)
• Height: 2.8 m (9 ft 2.25 in)
• Empty weight: 350 kg (772 lb)
• Gross weight: 550 kg (1,212 lb)
• Powerplant: 1 × Thulin rotary engine , 67 kW (90 hp)

Performance

• Maximum speed: 150 km/h (93 mph, 81 kn)

Armament

• 1 x 8 mm Madsen machine gun