Skymaster, 1948 B/RB-17 Flying Fortress, 1947–1949 B/RB-29 Superfortress, 1948–1949; 1950–1951 RB-50 Superfortress, 1950–1952 Boeing E-4, 1991–present C-135 Stratolifter, 1991–1994 EC-135, 1991–1998 KC-135 Stratotanker, 1991–present C-135, 1991–1994 RC-135, 1991–present TC-135, 1991–present WC-135, 1992–present T-38 Talon, 1992–1995 C-21, 1993–1997 OC-135, 1994–present EC-130, 2002–2003 Notes References Air Force Historical Research Agency Maurer, Maurer, Air Force Combat Units of World War II, Office of Air Force history (1961). Maurer, Maurer, Combat Squadrons of the Air Force, World War II, Office of Air Force history (1982). usaaf.com 55th Fighter Group littlefriends.co.uk 55th Fighter Group USAF Aircraft Serial Number Search External links 055 Military units and formations in Nebraska