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Boeing TB

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The Boeing TB (or Model 63) was an American torpedo bomber biplane designed by the US Navy and built by Boeing in 1927.

Development and design

The TB was an improved version of the Martin T3M. It was constructed of all dural, with a fabric covering. The equal-span wings were large and unstaggered, and could be folded aft , reducing the span to 21ft 8in for storage. The wheeled undercarriage was a conventional configuration that could be interchangeable with floats. As a landplane, the main gear units carried twin wheels. The underside of the fuselage incorporated a glazed station for the bombardier.[1]

Even before the three XTB-1s were delivered, the Navy's Bureau of Aeronautics had changed its opinion about what was needed in a torpedo bomber, and based on experience with the NAF XTN-1 had decided that a twin-engine aircraft would better suit the role. Having thus been made redundant, no TBs past the three prototypes were built.[1]




  1. 1.0 1.1 Cite error: Invalid <ref> tag; no text was provided for refs named Bowers63
  • Bowers, Peter M. Boeing aircraft since 1916. London: Putnam Aeronautical Books, 1966.
  • Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions, 170. 
  • World Aircraft Information Files. London: Bright Star Publishing, File 890 Sheet 52. 

Template:Boeing model numbers Template:USN torpedo aircraft

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It uses material from the Wikipedia article "Boeing TB".