Isley, AF-117, 1, 4, 6. Also: Isley 2001, 9, 13, 17-18. The KC-135 Stratotanker is an air-to-air refueling tanker aircraft similar in appearance to a Boeing 707: Length: 136’ 3” (41.53 m); Height: 38’ 4” (12.70 m); Wingspan: 130’ 10” (39.88 m).