Boeing TB

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

Role Torpedo bomber
Manufacturer Boeing
First flight 4 May 1927[1]
Number built 3
Program cost $199,000
Developed from Martin T3M

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 21 feet 8 inches (6.60 m) for storage. The wheeled undercarriage was a conventional configuration that could be interchanged 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]


Boeing TB-1 3-view L'Aéronautique October,1927
Boeing TB-1 3-view drawing from L'Aéronautique October,1927

Data from Bowers 1966, p. 63

General characteristics

  • Crew: Three - pilot, gunner, and bombardier
  • Length: 40 ft 10 in (12.45 m)
  • Wingspan: 55 ft 0 in (16.76 m)
  • Height: 13 ft 6 in (4.12 m)
  • Wing area: 868 ft2 (80.6 m2)
  • Empty weight: 5,640 lb (2,558 kg)
  • Gross weight: 9,786 lb (4,339 kg)
  • Powerplant: 1 × Packard 3A-2500, 730 hp (544 kW)


  • Maximum speed: 115 mph (185 km/h)
  • Range: 878 miles (1,413 km)
  • Service ceiling: 12,500 ft (3,810 m)
  • Rate of climb: 754 ft/min (3.8 m/s) 



  1. ^ a b c Bowers 1966, p. 63
  • Bowers, Peter M. (1966). Boeing aircraft since 1916. London: Putnam Aeronautical Books.
  • Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 170.
  • World Aircraft Information Files. London: Bright Star Publishing. pp. File 890 Sheet 52.
Boeing aircraft model numbers
Turbine engines
USN/USMC torpedo aircraft designations pre-1962
Torpedo Bomber
Torpedo Scout
Patrol Torpedo Bomber


This page is based on a Wikipedia article written by authors (here).
Text is available under the CC BY-SA 3.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.