Specifications for the
Heavy Bomber / Reconnaissance
Focus Model: Avro Lancaster B.Mk I
Country of Origin: United Kingdom
Manufacturer: Avro (AV Roe) / Armstrong Whitworth - UK
Initial Year of Service: 1942
Length: 69.49 ft (21.18 m)
Width: 102.00 ft (31.09 m)
Height: 20.01ft (6.10 m)
Weight (Empty): 36,901 lb (16,738 kg)
Weight (MTOW): 69,999 lb (31,751 kg)
Powerplant: 4 x Rolls-Royce Merlin XX V12 water-cooled, inline piston engines developing 1,280 horsepower each.
Maximum Speed: 287 mph (462 kmh; 249 kts)
Maximum Range: 2,529 miles (4,070 km)
Service Ceiling: 24,508 ft (7,470 m; 4.6 miles)
Rate-of-Climb: 0 feet-per-minute (0 m/min)
2 x 7.7mm Browning machine guns in nose turret
2 x 7.7mm Browning machine guns in dorsal turret
4 x 7.7mm Browning machine guns in tail turret
4,000lbs to 22,000lbs of internal ordnance or specialized mission equipment (22,000lb Grand Slam, 12,000lb Tallboy or 9,250lb Upkeep bombs).
Type 683 - Initial Avro Model Designation
Mk I - Initial Prototype and Production Model Designation (1941); two prototypes completed.
B.Mk I - Redesignated from 1942 onwards; definitive production model; 3,425 examples completed.
PR.Mk I - Photo-reconnaissance variant based on the Mk I sans armament.
B.Mk I (FE) - Tropicalized Far East variant of the Mk I
B.Mk II - Fitted with Bristol Hercules VI/XVI radial engines; 300 produced by Armstrong Whitworth.
B.Mk III - B.Mk Is fitted with American Packard Merlin engines; 3,039 produced.
ASR.Mk I - Air-Sea Rescue Platform
GR.Mk III / MR.Mk III - Maritime Reconnaissance Platform
B.Mk IV - Lengthened fuselage with increased wingspan; fitted with Bouton Paul turret and 2 x 0.50 caliber Browning machine guns; mixed Merlin 85 and 68 engine configuration; redesigned nose; becoming the Lincoln B.Mk I.
B.Mk V - Lengthened fuselage with increased wingspan; Merlin 85 engines; becoming the Lincoln B.Mk II.
B.Mk VI - B.III conversions with Merlin 85/87 supercharged engines.
B.Mk VII - Final production Lancaster variant; Martin dorsal turret with 2 x 05.0cal Browning machine guns moved forward along spine; 2 x 0.50cal Browning heavy machine guns at tail turret.
B.VII (FE) - Far East Variant
B.VII (Western Union) - French-bound Mk VIIs
B.Mk X - Canadian-produced Lancaster B.III
B.Mk XV - Canadian-produced Lancaster B.IV (Lincoln B.Mk I).