LANCASTER BOMBER. WWII Aircraft that Changed The War. Powered By 4 Merlin Engines | Documentary

The Avro Lancaster was a British Second World War heavy bomber, key to winning the war in Europe against Nazi Germany. It was designed and manufactured by Avro as a contemporary of the Handley Page Halifax, both bombers having been developed to the same specification, as well as the Short Stirling, all three aircraft being four-engined heavy bombers adopted by the Royal Air Force (RAF) during the same wartime era. It was powered by 4 Rolls-Royce Merlin XX V-12 liquid-cooled piston engines, producing 1,280 hp (950 kW) each. The Lancaster has its origins in the twin-engine Avro Manchester which had been developed during the late 1930s in response to the Air Ministry Specification for a medium bomber for “worldwide use“ which could carry a torpedo internally, and make shallow dive-bombing attacks. Originally developed as an evolution of the Manchester (which had proved troublesome in service and was retired in 1942), the Lancaster was designed by Roy Chadwick and powered by four Rolls-Roy