Avro Lancaster

Avro Lancaster
Name	Avro Lancaster
Type	Heavy bomber
Manufacturer	Avro
Designer	Roy Chadwick
First flight	9 January 1941
Introduced	February 1942
Retired	1963 (RCAF)
Primary user	Royal Air Force
Number built	7,377
Developed from	Avro Manchester
Variants	Avro Lancastrian

Avro Lancaster. The Avro Lancaster was a British Second World War heavy bomber that became the preeminent night bomber of the RAF's Bomber Command. Designed by Roy Chadwick and built by Avro, it was developed from the unsuccessful Avro Manchester and entered service with No. 44 Squadron RAF in early 1942. Renowned for its large bomb bay, rugged durability, and pivotal role in the strategic bombing campaign against Nazi Germany, the Lancaster remains an iconic symbol of British aviation and Allied air power.

Development and design

The Lancaster's origins lie in the failure of the Rolls-Royce Vulture engine that powered the twin-engine Avro Manchester. Under the direction of Roy Chadwick, Avro redesigned the airframe to accommodate four reliable Rolls-Royce Merlin engines, creating the Manchester Mk III, which was swiftly renamed the Lancaster. The prototype, powered by Merlin X engines, first flew from RAF Ringway in January 1941, piloted by H.A. "Sam" Brown. Its key feature was a vast, uninterrupted bomb bay capable of carrying exceptional loads, including the 12,000 lb Tallboy bomb and the 22,000 lb Grand Slam bomb designed by Barnes Wallis. The aircraft employed a mid-wing design with a distinctive twin-tail configuration and was defended by eight Browning .303 machine guns in three turrets operated by a crew of seven. Major production was undertaken by Avro at its Woodford plant, with additional manufacturing by Armstrong Whitworth, Austin Motor Company, and Vickers-Armstrongs.

Operational history

The Lancaster entered operational service with No. 44 Squadron RAF in February 1942 and quickly became the backbone of RAF Bomber Command's night offensive. It participated in every major bombing raid over Europe, including the audacious Operation Chastise (the "Dambusters" raid) conducted by No. 617 Squadron RAF using bouncing bombs. Lancasters were central to the Battle of the Ruhr, the Battle of Hamburg (Operation Gomorrah), and the controversial firebombing of Dresden. The type also saw action in other theatres, performing anti-shipping roles with Coastal Command and supporting the Allied invasion of Sicily and the Italian Campaign. Its most famous single operation was the November 1944 sinking of the German battleship Tirpitz in Norway using Tallboy bombs. By war's end, Lancasters had flown over 156,000 sorties, dropping 608,612 tons of bombs.

Variants

The primary production variant was the Lancaster B I, built with Rolls-Royce Merlin XX engines. The B III was virtually identical but used Packard-built Merlin engines imported from the United States. Specialized variants included the B I (Special), modified to carry the bouncing bomb and later the massive Grand Slam bomb. The Lancaster ASR III was a dedicated air-sea rescue model, while the Lancaster GR 3 served in maritime reconnaissance. Post-war, many aircraft were converted into civilian Lancastrian airliners or freighters. The Lancaster was also developed into a new design, the longer-range Avro Lincoln, which served as the RAF's standard postwar heavy bomber.

Operators

The primary wartime operator was the Royal Air Force, with squadrons in Bomber Command, Coastal Command, and the Pathfinder Force. It was also used extensively by the Royal Canadian Air Force and the Royal Australian Air Force within RAF Bomber Command. Post-war operators included the French Aéronavale, the Argentine Air Force, and the Egyptian Air Force. The Soviet Air Force evaluated three aircraft via the Arctic convoys. The Lancaster remained in service with the RAF's No. 82 Squadron RAF in photographic reconnaissance roles into the 1950s, while the RCAF operated maritime patrol versions until 1963.

Survivors and displays

Only two Lancasters remain airworthy today. One, named "Vera" (FM213), is operated by the RCAF's Canadian Warplane Heritage Museum in Hamilton, Ontario. The other, "Thumper" (PA474), is flown by the RAF's Battle of Britain Memorial Flight based at RAF Coningsby. Notable static displays include a B I at the Royal Air Force Museum London in Hendon and a B VII at the Imperial War Museum Duxford. Other complete aircraft are preserved at the Australian War Memorial in Canberra, the Museum of Transport and Technology in Auckland, and the Fuselage of a Lancaster recovered from a lake is displayed at the Nanton Lancaster Society Air Museum in Alberta.

Specifications (Lancaster B I)

* Crew: 7 (Pilot, Flight engineer, Bombardier, Navigator, Wireless operator, Mid-upper gunner, Rear gunner) * Length: 69 ft 5 in (21.16 m) * Wingspan: 102 ft 0 in (31.09 m) * Height: 20 ft 0 in (6.10 m) * Empty weight: 36,900 lb (16,738 kg) * Powerplant: 4 × Rolls-Royce Merlin XX V12 engines, 1,280 hp (954 kW) each * Maximum speed: 282 mph (454 km/h) at 15,000 ft (4,600 m) * Range: 2,530 mi (4,070 km) with a 7,000 lb (3,200 kg) bomb load * Service ceiling: 23,500 ft (7,160 m) * Armament: 8 × Browning .303 machine guns in Nash & Thompson turrets; up to 22,000 lb (10,000 kg) bomb load

Category:Avro aircraft Category:World War II British bombers Category:Four-engined aircraft