Werner Thierfelder (24 December 1915 – 18 July 1944) was a German Luftwaffe ace and recipient of the Knight's Cross of the Iron Cross during World War II. The Knight's Cross of the Iron Cross was awarded to recognise extreme battlefield bravery or successful military leadership. Werner Thierfelder was killed on 18 July 1944. Unit commander of Erprobungskommando 262, out of Lechfeld, he was lost in crash of a Me 262A-1a under unclear circumstances. Luftwaffe records indicate that he was shot down but U.S. and British records show no comparable engagement. A possible cause is that Thierfelder exceeded the airframe's limiting Mach number in a dive, perhaps while pursuing an Allied reconnaissance aircraft, leading to an irrecoverable dive. During his career he was credited with 27 aerial victo