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LB-5
XLB-5 prototype
Role Bomber
National origin United States
Manufacturer Keystone Aircraft Corporation
First flight 1927
Primary user United States Army Air Corps
Number built 36

The Keystone LB-5 (originally produced under the Huff-Daland name) was a bomber aircraft produced in the United States in the late 1920s. Its manufacturer nicknamed it the Pirate, but this name was not officially adopted by the USAAC. The LB-5 was a member of the family of closely-related bomber designs that had debuted with the XLB-1 in 1923, and as such, was a large, single-bay, conventional biplane. Like most of the family, it was a twin-engine machine, with engines mounted in nacelles on the lower wing. The prototype XLB-5 had a single tail fin like the XLB-1, the ten LB-5 production machines were designed with a triple-finned tail, but the final batch was redesigned with twin tails and designated LB-5A.

Variants

  • XLB-5 - Prototype (1 built from LB-1) with single tail fin
  • LB-5 - first production batch with triple tail fins (10 built)
  • LB-5A - second production batch with twin tails (25 built)

Operators

 United States

Specifications (LB-5)

General characteristics

  • Crew: Five - pilot, copilot, bombardier, two gunners
  • Length: 44 ft 8 in (13.61 m)
  • Wingspan: 67 ft 0 in (20.42 m)
  • Height: 16 ft 10 in (5.13 m)
  • Wing area: 1,138 ft² (105.8 m²)
  • Empty weight: 7,024 lb (3,194 kg)
  • Gross weight: 12,155 lb (5,525 kg)
  • Powerplant: 2 × Liberty L-12, 420 hp (310 kW) each

Performance

  • Maximum speed: 107 mph (171 km/h)
  • Range: 435 miles (696 km)
  • Service ceiling: 8,000 ft (2,500 m)
  • Rate of climb: 250 ft/min (1.3 m/s)

Armament

  • 2 × trainable .303 in (7.7 mm) Lewis guns in open position in nose
  • 2 × trainable .303 in (7.7 mm) Lewis guns in open dorsal position
  • 1 × trainable .303 in (7.7 mm) Lewis gun in ventral hatch
  • 2,312 lb (1,051 kg) of bombs

References

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