J.Forsgren Swedish Military Aircraft 1911-1926 (A Centennial Perspective on Great War Airplanes 68)

Thulin N

  A single-seat biplane powered by a 120 h.p. Thulin G rotary engine, the Thulin N had excellent performance. Flown for the first time on December 30, 1917. With the cancellation of the Thulin H, it was proposed to use the available funds for two Thulin N’s instead. For a number of reasons, this never happened.
  The Thulin N was later fitted with a twin-float landing gear. It appears unlikely that it was ever flown on floats.
  When the war ended, surplus airplanes was cheap and readily available. With the Phonix D.III costing about 4,000 kronor, the rotary-engine Thulin N was at a distinct disadvantage, costing 35,000 kronor. In the event, only one Thulin N was built. This airplane is preserved with the National museum of Science and Technology. At the time of writing, the Thulin N is stored at Siljansnas.

Thulin N Technical Data and Performance Characteristics
   Engine: 1 x 120 h.p. Thulin G
   Length: 5,65 m
   Wingspan: 7,86 m
   Height: 2,74 m
   Wing area: 21,75 m2
   Empty weight: 400 kg
   Maximum weight: 560 kg
   Maximum speed: 160 km/h
   Armament: -


Thulin NA

  Completed in early 1919, the Thulin NA was essentially a larger, two-seat development of the Thulin N. Put on static display in Copenhagen in April 1919, the Thulin NA was offered to the AFK on April 15, 1920, but rejected due to the availability of cheap airplanes from foreign manufacturers. Although described as a ”two-seat fighter”, the Thulin NA never received any type of armament. Lack of space would have precluded fitting and operating a flexible machine gun in the rear seat.
  Nevertheless, it was later said that: ’’without exaggeration (the Thulin NA), can be said to have been in the same league as the best foreign contemporary fighters.” Powered by a 120 h.p. Thulin G rotary engine, the Thulin NA remained for some undetermined reason unflown until 1921, when the German pilot Graf von Bismarck was able to fly the airplane. Although von Bismarck spoke highly of the Thulin NA’s flight and handling characteristics, the airplane remained unsold.
  The sole Thulin NA is preserved at the Landskrona Museum.

Thulin NA Technical Data and Performance Characteristics
   Engine: 1 x 135 h.p. Thulin G
   Length: 5,80 m
   Wingspan: 8,10 m
   Height: 2,53 m
   Wing area: 20,45 m2
   Empty weight: 400 kg
   Maximum weight: 700 kg
   Maximum speed: 215 km/h
   Armament: -