KC135

The KC-135 Stratotanker is a United States Air Force aerial refueling aircraft that has served as a backbone of strategic reach since the 1950s. It was developed from the Boeing 367-80 prototype and first flew in 1956, entering service in 1957 to replace earlier tanker designs. Over the years the KC-135 has been operated by the United States and by several allied air forces, remaining in frontline service for decades and gradually being supplemented by newer tankers such as the KC-46 Pegasus.

Design and role

The KC-135 is a four-engine jet aircraft built for mid-air refueling and cargo/passenger tasks. It features a retractable aerial refueling boom mounted on the aft fuselage, operated by a dedicated refueling crew member who controls the flow of fuel to receiving aircraft. The platform provides global reach by extending the range of combat and support aircraft. Many airframes were upgraded during its life with improved engines, avionics, and defensive systems to maintain compatibility with evolving mission requirements.

Variants and equipment

The fleet has included multiple variants, such as KC-135A, KC-135B, KC-135E, KC-135R and KC-135T, as well as reconnaissance versions derived from the same airframe (notably RC-135). The KC-135R variant introduced newer engines and improved performance, extending its useful life and operational capability.

Operational history

The KC-135 has supported numerous operations around the world, enabling long-range air operations, strategic bombing campaigns, and global mobility. Through continual upgrades, the tanker has remained a core element of the U.S. Air Force aerial refueling fleet and has also equipped several other nations’ air forces.

See also

RC-135

Boeing 367-80