▁ ▁In ▁conj unction ▁with ▁his ▁request ▁for ▁help ▁from ▁General major ▁E cc ard ▁Frei herr ▁von ▁Gab len z ▁in ▁May ▁ 1 9 4 2 , ▁concerning ▁the ▁suit ability ▁of ▁aircraft ▁for ▁the ▁Amer ik ab om ber ▁contract ▁competition ▁as ▁that ▁proposal ▁first ▁appeared , ▁Gener alf eld mar sch all ▁Er hard ▁Mil ch ▁also ▁received ▁von ▁Gab len z ' s ▁opinion ▁on ▁the ▁He ▁ 1 7 7 ▁and ▁its ▁He ▁ 2 7 4 ▁development , ▁with ▁von ▁Gab len z ▁stating ▁that ▁neither ▁of ▁these ▁He inkel ▁" he avy ▁bom ber " ▁designs ▁had ▁anywhere ▁near ▁the ▁range ▁to ▁conduct ▁a ▁mission ▁approaching ▁the ▁dem ands ▁of ▁the ▁new ▁contract . ▁ ▁A ▁pair ▁of ▁the ▁early ▁He   1 7 7 A - 0 ▁pre - production ▁pro tot ypes ▁were ▁renamed ▁the ▁He ▁ 1 7 7 ▁V 1 0 ▁and ▁V 1 1 ▁for ▁the ▁purposes ▁of ▁high - alt itude ▁tri als ▁and ▁were ▁to ▁be ▁the ▁first ▁to ▁test ▁the ▁A - 4 ▁pattern ▁press ur ized ▁co ck pit ▁design ▁at ▁alt itude . ▁Only ▁the ▁V 1 1 ▁was ▁used ▁for ▁the ▁needed ▁research ▁and ▁managed ▁to ▁achieve ▁an ▁alt itude ▁of ▁ 9 , 2 0 0   m ▁( 3 0 , 2 0 0   ft ) ▁on ▁August ▁ 9 , ▁ 1 9 4 3 . ▁Further ▁tests ▁continued ▁through ▁October ▁of ▁that ▁year , ▁before ▁the ▁V 1 0