▁of ▁the ▁Star lin er ▁began ▁when ▁Lock he ed ▁designed ▁the ▁L - 1 4 4 9 ▁in ▁response ▁to ▁the ▁Douglas ▁DC - 7 C ▁Seven ▁Se as . ▁Power ed ▁by ▁four ▁ 5 5 0 0   hp ▁Pr att ▁& ▁Whit ney ▁P T 2 G - 3 ▁tur b op rop ▁engines , ▁the ▁L - 1 4 4 9 ▁would ▁have ▁cru ised ▁faster ▁than ▁the ▁DC - 7 C ▁with ▁compar able ▁range ▁with ▁ ▁of ▁fuel ▁in ▁a ▁new ▁ ▁wing . ▁Pr att ▁& ▁Whit ney ▁dropped ▁the ▁P T 2 ▁project ▁in ▁March ▁ 1 9 5 5 ▁due ▁to ▁expected ▁un re li ability , ▁high ▁specific ▁fuel ▁consumption ▁and ▁high ▁operating ▁costs , ▁though ▁the ▁T 3 4 ▁military ▁version ▁of ▁the ▁engine ▁power ed ▁the ▁Douglas ▁C - 1 3 3 ▁fre ighter , ▁which ▁was ▁also ▁pl ag ued ▁with ▁un re li ability . ▁ ▁The ▁L - 1 4 4 9 ▁would ▁have ▁been ▁about ▁ ▁longer ▁than ▁the ▁L - 1 0 4 9 ▁series ▁with ▁a ▁maximum ▁gross ▁take off ▁weight ▁( M G TO W ) ▁of ▁. ▁The ▁L - 1 5 4 9 ▁replaced ▁the ▁ 1 4 4 9 ▁in ▁early ▁ 1 9 5 5 , ▁with ▁an ▁additional ▁ ▁stretch ▁and ▁M G TO W ▁of ▁, ▁pres umably ▁still ▁with ▁the ▁P T 2 ▁tur b opro ps . ▁ ▁Lock he ed ▁told ▁Trans ▁World ▁Airlines