Siemens-Schuckert D.IV

Image : Wikimedia Commons

The Siemens-Schuckert D.IV, which first flew in 1918, represents the final evolution of the D-series fighters from Germany. This single-seat aircraft measures 5.7 meters long with an 8.3-meter wingspan, achieving 190 km/h with a 380-kilometer range. The modest incremental speed improvement over the D.III reflects the diminishing returns in piston-engine fighter optimization during war's final months. The D.IV's performance envelope remained typical of German rotary-engine fighters, emphasizing maneuverability and climb rate over speed.