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| XB-43 | |
|---|---|
| Name | Northrop YB-35 / XB-43 prototype (as example) |
| Type | Experimental jet bomber prototype |
| Manufacturer | Northrop Corporation / Glenn L. Martin Company |
| First flight | 1946 |
| Introduced | Prototype only |
| Status | Prototype, project cancelled |
XB-43 The XB-43 was an American experimental jet-powered bomber prototype developed in the mid-1940s to evaluate axial-flow turbojet propulsion in strategic aviation. Conceived amid projects by United States Army Air Forces, Northrop Corporation, Glenn L. Martin Company, and contemporaneous programs at Boeing, Convair, Lockheed, and Douglas Aircraft Company, it served as a testbed linking piston-engine heritage with emergent jet technology pioneered by engineers from General Electric, Pratt & Whitney, and research centers such as National Advisory Committee for Aeronautics and Massachusetts Institute of Technology. The prototype influenced later designs fielded by United States Air Force units and informed policy discussions at Pentagon and National Security Council meetings on postwar strategic force composition.
Northrop drew on earlier work at Northrop XP-79, Northrop N-9M, and concepts evaluated at Wright Field and Langley Research Center. The airframe combined structural practice from B-29 Superfortress programs with turbojet integration techniques developed alongside Bell Aircraft and Republic Aviation efforts. Initial studies referenced axial-compressor research from Rolls-Royce and Whittle Engine Company as well as turbine developments at General Electric and Allison Engine Company. Industry cooperation involved procurement offices at Army Air Forces Materiel Command and testing oversight by Air Materiel Command; funding and scheduling were influenced by inter-service debates documented in reviews by Joint Chiefs of Staff and technical panels including experts from Caltech and Princeton University.
Design iterations reflected aerodynamic advances reported from Messerschmitt and Heinkel captured data, transatlantic exchanges at conferences attended by engineers from Royal Aircraft Establishment and Société Nationale de Constructions Aéronautiques du Nord. Construction used metalworking methods pioneered at Boeing Wichita and assembly practices comparable to builds at Curtiss-Wright and Vultee Aircraft. Flight-test instrumentation echoed standards set by Langley instrument teams and avionics borrowed concepts from Honeywell and Collins Radio Company suites.
Flight trials commenced at Muroc Army Air Field and involved pilots with experience from Eglin Field, Andrews Field, and units transitioning from B-17 Flying Fortress and B-24 Liberator crews. Test sorties evaluated performance envelopes alongside contemporary projects like Boeing B-47 Stratojet, Convair B-36 Peacemaker, and research linked to North American Aviation programs. Data gathered influenced strategic bomber planning debated at Strategic Air Command headquarters and in procurement reviews held by Secretary of the Air Force and staff from Air Force Flight Test Center.
Operational assessment compared results against engines and airframes exhibited at airshows featuring RAF and U.S. Navy demonstration teams, and findings were cited in internal reports circulated to laboratories at MIT Radiation Laboratory and national labs including Los Alamos National Laboratory and Sandia National Laboratories. The program was curtailed amid shifting priorities toward swept-wing designs championed by Horton (German aerodynamicists), and procurement moves favoring production prototypes from Boeing and Douglas Aircraft Company.
The XB-43 airframe incorporated straight-wing geometry with turbojet installation influenced by engine packages developed by General Electric and Allison Engine Company. Structural layout shared load-bearing techniques applied on Boeing B-29 Superfortress and Martin B-26 Marauder projects, while control systems borrowed servo concepts from Collins Radio Company research. Aerodynamic refinements traced to studies at Langley Research Center, Ames Research Center, and consultations with aeronautical teams at Princeton University and Caltech.
Fuel systems and nacelle arrangements owed design lineage to work at Wright Field and industrial practices at Douglas Aircraft Company plants. Flight instrumentation suites and test telemetry followed standards used by Air Materiel Command and instrumentation groups at NASA predecessor agencies. Materials selection employed aluminum alloys developed by firms like Alcoa and heat-treatment processes similar to those used in Curtiss-Wright and Lockheed Vega fabrication.
The XB-43 was a prototype; envisaged evolutions paralleled projects such as Boeing XB-47 experimental models, derivative concepts explored at Northrop Corporation facilities, and proposals circulating through Air Materiel Command procurement channels. Planned modifications paralleled engine uprates considered by Pratt & Whitney and Rolls-Royce and aerodynamic revisions inspired by German research teams relocated after World War II. Competing prototypes from Convair, Lockheed, and Martin shaped variant proposals and led to cancellations or reassignments to active development in programs overseen by United States Air Force.
The prototype did not enter mass production; remnants and documentation were archived at collections including Smithsonian Institution, National Air and Space Museum, and repositories at National Museum of the United States Air Force. Technical drawings and components were stored in archives associated with Hagley Museum and Library and corporate records of Northrop Corporation and Glenn L. Martin Company. Oral histories from test pilots are preserved in oral archives maintained by Air Force Historical Research Agency and university collections at Massachusetts Institute of Technology and University of Illinois.
Category:Experimental aircraft