FS2002/FS2004 Fokker D.XXIII. This is a fighter of the Netherlands developed just before World War II. The layout that has two engines arranged front and back in the body. Though the test was begun in May 1939, the low output of the engine and cooling the back engine became problems. The Netherlands surrendered after the invasion of the German army in May 1940, and development was discontinued. Only one prototype was destroyed afterwards or is said to have been confiscated by Germany to use as research material. By Kazunori Ito.