Martin XLB-4

The Martin XLB-4 was a 1920s proposal for a light bomber by the Glenn L. Martin Company.

XLB-4
Role Medium bomber
Manufacturer Martin
Status Paper project only
Number built 0

Design and development

The XLB-4 would have been a biplane bomber of all metal construction, powered by two Pratt & Whitney R-1690 Hornet radial engines. The United States Army Air Corps (USAAC) ordered a single prototype serialled 27-332, but the aircraft was cancelled because the USAAC leadership was lukewarm about experimenting with all-metal aircraft.[1][2]

Specifications (XLB-4 estimated)

General characteristics

  • Crew: 5
  • Length: 44 ft 8 in (13.61 m)
  • Wingspan: 76 ft (23 m)
  • Height: 16 ft 7 in (5.06 m)
  • Wing area: 1,203.0 sq ft (111.76 m2)
  • Empty weight: 5,891 lb (2,672 kg)
  • Gross weight: 11,982 lb (5,435 kg)
  • Powerplant: 2 × Pratt & Whitney R-1690 Hornet 9-cylinder air-cooled radial piston engines, 525 hp (391 kW) each

Performance

  • Maximum speed: 69 mph (111 km/h, 60 kn)
  • Wing loading: 9.98 lb/sq ft (48.7 kg/m2)

See also

Related development

Aircraft of comparable role, configuration and era

Related lists

References
  1. Wagner, Ray (23 March 1982). American combat planes (3d, enl. ed.). Doubleday. ISBN 9780385131209.
  2. Baugher, Joe. "Martin XLB-4". www.joebaugher.com. Retrieved 30 January 2019.
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