Avro Lancaster Mk.Ib

When the United Kingdom's Bomber Command was given the difficult missions of destroying German dams in the Ruhr valley and sinking the pocket battleship Tirpitz in a Norwegian fjord with 12,000 lb "Tall Boy" bombs, their aircraft of choice was the Avro Lancaster heavy bomber. The Lancaster gave the UK the offensive striking power needed to penetrate German air defenses during World War II. As Winston Churchill instructed the Air Ministry in 1942, the UK must "…make sure that the maximum weight of the best type of bombs is dropped on [Germany] by the aircraft placed at their disposal."

Entering service at the beginning of 1942, the Lancaster’s design grew out of a failed predecessor, the Avro Manchester. While its’ airframe offered a stable platform for heavy bombing assignments, the Manchester’s twin 24 cylinder X type engine design was inadequate to the task. By upgrading to four 12 cylinder V type Merlins, the resulting aircraft met the nation’s needs and 7,366 Avro Lancasters were built during the war, the most of any British bomber. Armament included eight to ten Browning machine guns for fighter defense (depending on model variant) mounted in the nose, upper dorsal turret and the tail. Experience with a variety of bomb loads eventually led to adoption of the ‘Grand Slam’ 22,000-pound bomb, the largest carried by any aircraft in the war. For the dam-busting strike in May 1943, the Lancaster dropped British designer Barnes Wallis’s ‘bouncing bombs’ which skipped on the surface before impact. Wartime Lancaster sorties totaled about 156,000 during which roughly 608,000 tons of ordnance were dropped on the enemy.

As the war in Europe drew to a close, the Lancaster was readied for service against Japan as part of Bomber Command’s ‘Tiger Force’, but the war’s end put a halt to this plan. Apart from its primary bombing tasks, the versatile Lancaster was also used for maritime surveillance, photo reconnaissance missions and, later, as an engine test bed platform. The final airframe was delivered in February, 1946 but the plane flew for many years in civilian guise and as a warplane when sold to other nations.

GB Planes and Specifications