The Beardmore W.B.1a was a British two-seater long-distance bomber biplane of World War I developed by Beardmore. The pilot and observer were seated in the rear of the fuselage, just before the tail section.^[1]

Specifications

Data from ^[1]

General characteristics

• Crew: 2
• Capacity: 2
• Length: 32 ft 10 in (10.01 m)
• Wingspan: 70 ft (21 m)
• Height: 15 ft 8 in (4.78 m)
• Wing area: 946 sq ft (87.9 m²)
• Empty weight: 4,537 lb (2,058 kg)
• Gross weight: 8,900 lb (4,037 kg)
• Fuel capacity: 214 imp gal (257 US gal; 973 L)
• Powerplant: 1 × Galloway Atlantic , 500 hp (370 kW)
• Propellers: 4-bladed fixed-pitch propeller, 14 ft (4.3 m) diameter
  
• Propeller speed: 900 rpm

Performance

• Cruise speed: 110 mph (180 km/h, 96 kn)
• Endurance: 6 hours 30 minutes
• Wing loading: 9.4 lb/sq ft (46 kg/m²)
• Power/mass: 0.058 hp/lb (0.095 kW/kg)