High Quality Content by WIKIPEDIA articles! Helmut Lipfert (6 August 1916 – 10 August 1990) was a German Luftwaffe fighter ace and recipient of Knight`s Cross with Oak Leaves. Lipfert ranks as the world`s thirteenth fighter ace. Lipfert was credited with 203 victories achieved in 687 combat missions. All his victories were claimed over the Eastern front and included a P-51 Mustang, 41 Yakovlev Yak-1, 41 Yakovlev Yak-9 fighters, two four-engine bombers and 39 Ilyushin Il-2 ground-attack aircraft. He was shot down fifteen times, without being injured.