Avro Lancaster Type 683
The Avro Lancaster evolved from Britain’s concerns regarding the deteriorating international situation during the late 1930’s. The Handley-Page Halifax, Short Stirling, and the twin-engined Avro Manchester were all in the planning stages as the war began in 1939. The prototype twin-engined Manchester flew in 1939 but was plagued by instability and problems with its complex, 24 cylinder Rolls Royce Vulture engines. Of the 202 Manchesters built more were lost to engine failure than enemy action.
Before the Manchester flew on operations, the aircraft’s designer, Roy Chadwick, realized that the aircraft would have serious shortcomings and made plans for its modification. He added twelve feet to the wingspan and replaced the two troublesome Vulture engines with four of the proven Rolls Royce Merlin V-12’s and the result was the Lancaster which made its maiden flight in January, 1941. A colleague later wrote that Chadwick, “showed himself to be a most resourceful and courageous designer, ultimately snatching success from failure in the most ingenious way with a superlatively successful operational aircraft.”
The new bomber was immediately regarded as a success and large production orders were placed. Avro’s production facilities were soon overwhelmed, and numerous other companies and contractors joined the effort to produce Lancasters. Consisting of 55,000 separate parts, it has been estimated that half a million different manufacturing operations were involved to produce just one aircraft. Peak production was achieved during August 1944 when 293 aircraft were produced
Lancasters first flew operationally in March 1942 and were well received by their aircrew. It was regarded as “a pilot’s airplane” which inspired confidence. Evidence of this is the story of a Lanc flight engineer who, having feathered two engines and facing the prospect of flying over several hundred miles of cold, unfriendly ocean, turned to his pilot and said, “I suppose this means we shall be bloody late for breakfast!”
The proven Rolls Royce Merlin engines were in demand for many types of aircraft. For this reason a version of the aircraft (MK II) was produced which made use of Bristol Hercules radial engines
During World War II the Lancaster was the most successful bomber used by the Royal Air Force and the Royal Canadian Air Force.The Lanc had speed, ceiling, and lifting power that no other aircraft of the day could match. Weighing 36,900 pounds empty, the Lancaster was capable of taking off with an additional 33,100 pounds of fuel and bombs; in other words it could almost carry its own weight again. The Lancaster carried 64% of the tonnage dropped by the RAF and RCAF during the war. The “Grand Slam”, a 22,000 pound special purpose bomb designed to penetrate concrete and explode below the surface to create an earthquake effect, could only be delivered by the Lancaster and the Lancaster was thus chosen for special operations such as the “Dambusters” raid and the attack which sunk the German Battleship Tirpitz.
Lancasters were built to accomplish their specific purpose and crew comfort and security was clearly a secondary consideration. Generally flying under the cover of darkness, the Lancaster had virtually no defensive armour. The front, mid-upper, and rear gun turrets were hydraulically powered and carried a total of eight .303 calibre machine guns for defence against enemy aircraft.
The crew worked in cramped conditions, particularly the air gunners who remained at their posts for the entire flight. Some had to place their flight boots into the turrets before climbing in, and then put their boots on. At night and at 20,000 feet the temperature in the turrets frequently fell to minus forty degrees and frostbite was not uncommon. Air gunners manned the rear and mid-upper gun turrets. A pilot, flight engineer, navigator, wireless operator, and bomb aimer/front gunner completed the crew of seven.
The Lanc’s massive bomb bay stretched for 33 feet and, unlike other bombers, was one continuous uninterrupted space. Partly for this reason, the Lanc had the versatility to undertake raids with large, specialized weapons. However, this meant that the main wing spars became obstacles to movement within the aircraft, particularly for airmen wearing heavy clothing and flight boots.
Of the total of 7,377 Lancasters built (430 of them in Canada), 3,932 were lost in action. During the war Lancasters flew a total of 156,308 sorties and dropped 608,612 tons of bombs, and placed over 12,000 mines in enemy waters.
Some of the aircraft’s finest hours were in “non-offensive” operations as the war was about end and shortly after peace finally was in place. The first of these was during “Operation Manna.” Lancaster squadrons dispatched a total of 3,156 sorties to drop 6,684 tons of food supplies to the starving Dutch in May 1945. The second saw many of the Lancaster squadrons tasked to return Allied Prisoners of War from various locations throughout Europe back to England. In a period of 24 days a total of 2900 round trips were flown and 74,000 ex-POW’s were returned.
With the end of hostilities on all war fronts, the Lancaster was by no means finished in its service. The RAF continued to use the aircraft in various roles including photographic and maritime duties until October 1956. The Royal Canadian Air Force, who flew back many of the surviving Mk.X’s back to Canada, continued to use the aircraft in photographic and maritime reconnaissance roles until the early 1960’s. The last three RCAF Lancasters were retired at a ceremony on April 1, 1964.
What is probably the finest tribute to the aircraft was written
by Marshall of the Royal Air Force Sir Arthur T. Harris,
wartime chief of Bomber Command:
“The finest bomber of the war! Its efficiency was almost incredible, both in performance
and in the way it could be saddled with ever-increasing loads without breaking the camel’s back.
The Lancaster far surpassed all the other types of heavy bombers.
Not only could it take heavier bomb loads, not only was it easier to handle,
and not only were there fewer accidents than with other types,
the casualty rate was also consistently below those of other types.”
“The Lancaster took the major part in winning the war with its attacks on Germany.
On land it forced the Germans to retrieve from their armies half their sorely needed
anti-tank guns for use by over a million soldiers who would otherwise have been serving in the field.
The Lancaster won the naval war by destroying over one-third of the German submarines in their ports,
together with hundreds of small naval craft and six of their largest warships.
Above all, the Lancaster won the air war by taking the major part in forcing Germany to concentrate
on building and using fighters to defend the Fatherland, thereby depriving their armies of
essential air and particularly bomber support.”