Twin-engined, single-seat fighter.
The D.23. had air-cooled in-line engines in a tandem arrangment, one in the nose and one in the end of the central nacelle.
Slender booms carried the tailplane.
This was Fokker last fighter. It had two 520hp Walter-Sagitta engines and the maximum speed was 520 km/h, fast, very fast in that time.
The calculated speed with with Rolls-Royce or Daimler engines was even 615 km/h.
The D.23 had one major disadvantage: if the pilot had to leave the plane at any moment for a parachute jump, he would have been cut into pieces by the rear propeller.
At that time, Fokker studied the possibilities of a ejection seat.
The prototype was destroyed in 1940.