Boeing OC-135B Open Skies

Boeing OC-135B Open Skies

The Boeing OC-135B Open Skies is the United States Air aircraft assigned to conduct observations. This aircraft is an supporter of the Treaty on Open Skies. This aircraft has been modified into a type of WC-135B, flying without any weapons for all participants observe the aviation treaty.

Role : Observation Support/Support Open Skies Treaty
Manufacturer : Boeing Military Airplanes Division
Introduction : June 1993
Primary user : United States Air Force
Number built : 3
Developed from : C-135 Stratolifter
Variants : WC-135 Constant Phoenix

The interior seats for 35 people including the cockpit crew, aircraft maintenance crew, foreign country representatives and crew members from the U.S. Department of Defense’s Defense Threat Reduction Agency (DTRA).

Cameras installed include one vertical and two oblique KS-87E framing cameras used for low-altitude photography approximately 3,000 feet (900 m) above the ground, and one KA-91C panoramic camera, which scans from side to side to provide a wide sweep for each picture used for high altitude photography at approximately 35,000 feet (10,000 m).

Boeing OC-135B Specifications

General characteristics

  • Crew: Seven (three pilots, two navigators, and two sensor maintenance technicians), also DTRA mission flight crew: mission commander, deputy mission commander, two sensor operators and one flight follower
  • Length: 135 ft (41.1 m)
  • Wingspan: 131 ft (39.9 m)
  • Height: 42 ft (12.8 m)
  • Max takeoff weight: 297,000 lb (134,700 kg)
  • Powerplant: 4 × Pratt and Whitney TF33-P-5 Turbofans with thrust reversers, 16,050 lbf (71.4 kN) each


  • Maximum speed: 500+ mph (800+ km/h)
  • Range: 3,900 miles (6,500 km)
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