Fokker K.I
Encyclopedia
The Fokker M.9 , also known as the K.I (for Kampfflugzeug), was a German
experimental aircraft.
First flown in 1915, the M.9 had two M.7
fuselages and tails, without engines, mounted on the lower wing. To this was added a central nacelle with two 80 hp Oberursel
rotary engine
s, one at either end, in a centerline thrust configuration. The crew of three included a pilot in the nacelle, and one gunner positioned at the nose of each fuselage.
Mounting the two fuselages on the wings with no connection between them further aft turned out to be a big mistake. Fokker was still using wing warping instead of ailerons for roll control, so when the wings were warped, the fuselages were deflected in opposite directions, either up or down depending upon which way the aircraft was rolled. This led to some very divergent flight characteristics.
The test program was brief.
Germany
Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...
experimental aircraft.
First flown in 1915, the M.9 had two M.7
Fokker M.7
-References:* ...
fuselages and tails, without engines, mounted on the lower wing. To this was added a central nacelle with two 80 hp Oberursel
Motorenfabrik Oberursel
Motorenfabrik Oberursel A.G. was a German manufacturer of automobile, locomotive and aircraft engines situated in Oberursel , near Frankfurt , Germany. During World War I it supplied a major 100 hp-class rotary engine that was used in a number of early-war fighter aircraft designs...
rotary engine
Rotary engine
The rotary engine was an early type of internal-combustion engine, usually designed with an odd number of cylinders per row in a radial configuration, in which the crankshaft remained stationary and the entire cylinder block rotated around it...
s, one at either end, in a centerline thrust configuration. The crew of three included a pilot in the nacelle, and one gunner positioned at the nose of each fuselage.
Mounting the two fuselages on the wings with no connection between them further aft turned out to be a big mistake. Fokker was still using wing warping instead of ailerons for roll control, so when the wings were warped, the fuselages were deflected in opposite directions, either up or down depending upon which way the aircraft was rolled. This led to some very divergent flight characteristics.
The test program was brief.