1 2 5 0 ). ▁L B - 1 ▁Single - engine ▁light ▁bom ber ▁bi plane , ▁power ed ▁by ▁an ▁ 8 0 0 - hp ▁( 5 9 7 - k W ) ▁Pack ard ▁ 2 A - 2 5 0 0 ▁p ist on ▁engine ; ▁nine ▁built ▁( S / N ▁ 2 6 - 3 7 7 / 3 8 5 ). ▁ ▁Oper ators ▁ ▁United ▁States ▁Army ▁Air ▁Service ▁ 1 1 th ▁Bomb ▁Squadron ▁ ▁Spec ifications ▁ ▁See ▁also ▁ ▁References ▁ ▁Notes ▁ ▁Bibli ography ▁▁ ▁Donald , ▁David , ▁ed . ▁Encyclopedia ▁of ▁World ▁A ircraft . ▁E to b ico ke , ▁ON : ▁Pro s per o ▁Books , ▁ 1 9 9 7 . ▁. ▁ ▁Sw an borough , ▁F . G . ▁and ▁Peter ▁M . ▁Bow ers . ▁United ▁States ▁Military ▁A ircraft ▁since ▁ 1 9 0 9 . ▁London : ▁Put nam , ▁ 1 9 6 3 . ▁ ▁H uff ▁Dal and ▁L B - 1 ▁– ▁National ▁Museum ▁of ▁the ▁United ▁States ▁Air ▁Force ▁ ▁Category : Bi plan es ▁L B - 0 1 ▁Category : Light ▁bom bers ▁Category : Single - eng ined ▁tra ctor ▁aircraft ▁H uff - D aland ▁L B - 0 1 <0x0A> </s> ▁The ▁Fight ing ▁Heart ▁is ▁a ▁ 1 9 2 5 ▁American ▁silent ▁drama ▁film ▁directed ▁by ▁John ▁Ford . ▁The ▁film ▁is ▁now ▁considered ▁to ▁be ▁a