The Thulin K was based on the Nieuport IVG which they’d imported.
Eighteen Thulin Ks were built in 1917, sixteen going to the Dutch Army in 1920.
Engine: Thulin A, 105 hp
Wingspan: 29 ft 9 in
Length: 21 ft 4 in
Max speed: 93 mph
Cruise: 81 mph
Landing speed: 53 mph
Time to 3300 ft: 4 min
Ceiling: 20,000 ft
All Aero 