- 1 3 0 s . ▁Radio ▁call ▁numbers ▁on ▁the ▁tail ▁of ▁these ▁aircraft ▁were ▁regularly ▁changed ▁so ▁as ▁to ▁conf use ▁obser vers ▁and ▁dis gu ise ▁their ▁true ▁mission . ▁ ▁The ▁extended - range ▁C - 1 3 0 E ▁model ▁entered ▁service ▁in ▁ 1 9 6 2 ▁after ▁it ▁was ▁developed ▁as ▁an ▁inter im ▁long - range ▁transport ▁for ▁the ▁Military ▁Air ▁Transport ▁Service . ▁Ess entially ▁a ▁B - model , ▁the ▁new ▁design ation ▁was ▁the ▁result ▁of ▁the ▁installation ▁of ▁ 1 , 3 6 0   US ▁gal ▁( 5 , 1 5 0   L ) ▁S argent ▁F let cher ▁external ▁fuel ▁t anks ▁under ▁each ▁wing ' s ▁mid section ▁and ▁more ▁powerful ▁All ison ▁T 5 6 - A - 7 A ▁tur b opro ps . ▁The ▁hyd ra ul ic ▁boost ▁pressure ▁to ▁the ▁a iler ons ▁was ▁reduced ▁back ▁to ▁ ▁as ▁a ▁consequence ▁of ▁the ▁external ▁t anks ' ▁weight ▁in ▁the ▁middle ▁of ▁the ▁wings pan . ▁The ▁E ▁model ▁also ▁featured ▁struct ural ▁improvements , ▁av ion ics ▁up gr ades ▁and ▁a ▁higher ▁gross ▁weight . ▁Australia ▁took ▁delivery ▁of ▁ 1 2 ▁C 1 3 0 E ▁Her cules ▁during ▁ 1 9 6 6 – 6 7 ▁to ▁supp lement ▁the ▁ 1 2 ▁C - 1 3 0 A ▁models ▁already ▁in ▁service ▁with ▁the ▁RA AF . ▁Sweden ▁and ▁Spain ▁fly ▁the ▁T P - 8 4