0   m ph ). ▁The ▁ro cket ▁engine ▁worked ▁as ▁expected , ▁and ▁ 3 4 6 - 3 , ▁quickly ▁acceler ating , ▁started ▁asc ending ▁and ▁soon ▁had ▁flow n ▁in ▁very ▁close ▁proxim ity ▁of ▁its ▁car rier ▁aircraft . ▁ ▁Z iese ▁then ▁reported ▁that ▁the ▁plane ▁was ▁not ▁respond ing ▁to ▁the ▁controls , ▁and ▁was ▁losing ▁alt itude . ▁Gr ound ▁control ▁commanded ▁him ▁to ▁b ail ▁out . ▁He ▁used ▁the ▁escape ▁caps ule ▁to ▁leave ▁the ▁str icken ▁aircraft ▁at ▁ 6 , 5 0 0 ▁meters ▁( 2 1 , 0 0 0   ft ) ▁and ▁land ed ▁safely ▁by ▁par ach ute . ▁With ▁the ▁loss ▁of ▁this ▁aircraft , ▁the ▁ 3 4 6 ▁program ▁was ▁abandoned . ▁ ▁Vari ants ▁ ▁D FS - 3 4 6 ▁- ▁First ▁prototype ▁built ▁by ▁Sie bel ▁Werke ▁in ▁the ▁early ▁ 1 9 4 0 s . ▁Later ▁taken ▁to ▁USS R ▁where ▁the ▁newly ▁formed ▁OK B - 2 ▁tested ▁it ▁in ▁Ts AG I ▁wind ▁tunnel . ▁Later ▁scra pped , ▁because ▁it ▁was ▁not ▁fly able . ▁▁ 3 4 6 - P ▁- ▁This ▁air frame ▁was ▁first ▁post - war ▁build ▁of ▁this ▁plane , ▁and ▁was ▁completed ▁in ▁ 1 9 4 8 ▁by ▁German ▁engine ers . ▁Vis ually ▁ 3 4 6 - P ▁was ▁identical ▁to ▁the ▁earlier ▁design , ▁except ing ▁a ▁landing ▁g ear ▁cow l ▁which ▁was ▁removed ▁primarily