▁He ▁ 2 7 4 ▁V 1 ▁and ▁V 2 ▁did ▁not ▁commence ▁until ▁ 1 9 4 3 . ▁They ▁were ▁to ▁have ▁been ▁built ▁in ▁France ▁by ▁SA U F ▁at ▁S ures nes , ▁France , ▁but ▁the ▁pro tot ypes ▁were ▁not ▁completed ▁in ▁time . ▁The ▁He ▁ 2 7 4 ▁V 1 ▁was ▁being ▁read ied ▁for ▁flight ▁testing ▁at ▁S ures nes ▁in ▁July ▁ 1 9 4 4 ▁when ▁the ▁approach ▁of ▁Al lied ▁forces ▁necess itated ▁the ▁ev acu ation ▁of ▁He inkel ▁personnel ▁working ▁on ▁the ▁project . ▁Minor ▁difficulties ▁had ▁delayed ▁the ▁flight ▁testing ▁and ▁transfer ▁of ▁the ▁aircraft ▁to ▁Germany , ▁and ▁orders ▁were ▁therefore ▁given ▁to ▁destroy ▁the ▁virt ually ▁completed ▁prototype . ▁Only ▁minor ▁damage ▁was ▁actually ▁done ▁to ▁the ▁air frame ▁of ▁the ▁He ▁ 2 7 4 ▁V 1 , ▁and ▁rep airs ▁were ▁begun ▁after ▁the ▁Al lied ▁occupation . ▁ ▁The ▁He ▁ 2 7 4 ▁V 1 ▁was ▁rep a ired ▁by ▁At el iers ▁A ér onaut iques ▁de ▁S ures nes ▁( A AS ) ▁and ▁used ▁by ▁the ▁Arm ée ▁de ▁l ' A ir ▁( F rench ▁Air ▁Force ) ▁for ▁several ▁years ▁as ▁a ▁high - alt itude ▁research ▁plane . ▁It ▁was ▁renamed ▁the ▁A AS ▁ 0 1 A . ▁The ▁He ▁ 2 7 4 ▁V 2 ▁was ▁eventually ▁completed ▁as ▁the ▁A AS ▁ 0 1 B , ▁completed ▁with ▁the ▁alternate ▁choice ▁of ▁He