RB-47 Stratojet

RB-47 Stratojet
National Nuclear Security Administration / Nevada Site Office · Public domain · source
Name	RB-47 Stratojet
Type	Strategic reconnaissance aircraft
Manufacturer	Boeing
First flight	1947 (prototype XB-47)
Introduced	1951
Retired	1967 (USAF)
Primary user	United States Air Force
Produced	2,032 (all B-47 variants)

RB-47 Stratojet was a jet-powered strategic reconnaissance aircraft developed by Boeing in the late 1940s and deployed by the United States Air Force during the early Cold War. Derived from the swept-wing medium bomber family that included the B-47 Stratojet family of designs, the RB-47 variants combined high-speed, high-altitude performance with specialized photographic, electronic, and signals intelligence systems for missions over and near Soviet Union and other strategic areas. The type played a central role in peacetime intelligence collection for commanders such as leaders of Strategic Air Command and influenced later platforms including the Lockheed U-2 and SR-71 Blackbird programs.

Development and Design

Boeing's XB-47 program emerged from requirements defined by United States Army Air Forces planners and later adopted by the United States Air Force to produce a swept-wing, six-engined jet capable of penetrating hostile airspace. The RB-47 reconnaissance conversions adapted the B-47B and B-47E airframes, integrating systems developed by contractors working with agencies such as the Central Intelligence Agency and the National Security Agency for photographic and electronic intelligence. Design features included a slender fuselage, multi-bay bomb/gear bay modifications for camera installations, a bicycle-type landing gear arrangement influenced by earlier Boeing Model 367-80 testing, and engine placements on pylons beneath the wings using General Electric J47 turbojets. Aerodynamic advances pioneered on the B-47 family informed later designs at Convair and Lockheed, and the RB-47's mission systems drove collaboration among Bendix Corporation, Eastman Kodak, and other firms.

Operational History

RB-47s entered service with reconnaissance wings assigned to Strategic Air Command during the early 1950s, supporting theater commanders such as those in United States European Command and United States Pacific Command. The aircraft conducted long-range photographic and electronic reconnaissance missions along approaches to Soviet Union airspace, flights near People's Republic of China and patrols over regions adjacent to Cuba during the 1962 crisis. RB-47 missions often involved coordination with assets from NATO allies and intelligence fusion centers in Washington, D.C. and Langley Air Force Base. Crews included officers trained at institutions such as Air University and units tracked operations through headquarters at Offutt Air Force Base. Operational deployment influenced rules of engagement debated in the United States Congress and shaped interagency procedures involving Defense Intelligence Agency analysts and Central Intelligence Agency liaisons.

Reconnaissance Equipment and Modifications

RB-47s were fitted with multiple camera systems provided by companies like Itek Corporation and Hughes Aircraft Company, enabling oblique, vertical, and high-resolution mapping photography. Electronic intelligence suites included radar and signals collection gear from Curtiss-Wright, General Radio Company, and bespoke NSA systems for direction finding and spectrum analysis. Some aircraft were modified with panoramic cameras for aeronautical charting supporting agencies such as the National Geospatial-Intelligence Agency's predecessors. Countermeasure fittings, including chaff dispensers and electronic countermeasures from Raytheon, were incorporated as the threat from Soviet Air Defense Forces and surface-to-air missiles evolved. Crew stations were reconfigured to accommodate reconnaissance officers and photo interpreters trained at places like National Reconnaissance Office-linked facilities.

Variants

The RB-47 family encompassed several subtypes converted from bomber production blocks to meet varied intelligence roles. Conversions of the B-47B and B-47E produced photographic reconnaissance models, while other designations incorporated electronic reconnaissance suites for signals intelligence missions supporting National Security Agency collection requirements. Specialized weather reconnaissance and electronic countermeasure testbeds were flown under program offices managed by Air Force Systems Command. Designation changes and retrofit programs mirrored similar evolutions in platforms such as the RB-29 Superfortress and later reconnaissance programs like the RC-135 Rivet Joint.

Accidents and Incidents

RB-47 operations were hazardous, involving long overwater flights, complex aerial refueling procedures with tankers like the KC-97 Stratofreighter, and intercepts by Soviet Air Force fighters such as MiG-15 and MiG-17 aircraft. Several RB-47s were lost to mechanical failures, navigational errors, and hostile action, provoking diplomatic incidents between the United States and Soviet Union. Notable confrontations prompted discussions at venues including United Nations forums and congressional hearings in Washington, D.C., and influenced rules of engagement codified by Department of Defense leadership. Survivors of shootdowns and forced landings were debriefed by agencies like the Central Intelligence Agency and medical evaluation centers on bases such as Brooks Air Force Base.

Operators

Primary operator: United States Air Force, with operational assignment mainly under Strategic Air Command reconnaissance wings and squadrons based at installations including Lockbourne Air Force Base, Ramey Air Force Base, and Fairchild Air Force Base. Supporting roles and maintenance involved contractors and depot facilities managed by Air Materiel Command and later Air Force Logistics Command.

Surviving Aircraft and Museums

A limited number of RB-47 airframes and B-47 derivatives survive in museum collections and restoration projects at institutions such as the National Museum of the United States Air Force, the Pima Air & Space Museum, and the Museum of Aviation in Warner Robins, Georgia. These exhibits illustrate the airframe’s role alongside displays on contemporaries like the B-52 Stratofortress and early spy plane programs, and are maintained by volunteers, former crew associations, and preservation organizations connected with aviation heritage centers.

Category:Boeing aircraft Category:Reconnaissance aircraft