About Luftwaffe

The Luftwaffe[N 2] (German pronunciation: ['l?ftvaf?] (listen)) was the aerial-warfare branch of the German Wehrmacht before and during World War II. Germany's military air arms during World War I, the Luftstreitkräfte of the Imperial Army and the Marine-Fliegerabteilung of the Imperial Navy, had been disbanded in May 1920 in accordance with the terms of the 1919 Treaty of Versailles which banned Germany from having any air force.

During the interwar period, German pilots were trained secretly in violation of the treaty at Lipetsk Air Base in the Soviet Union. With the rise of the Nazi Party and the repudiation of the Versailles Treaty, the Luftwaffe's existence was publicly acknowledged on 26 February 1935, just over two weeks before open defiance of the Versailles Treaty through German rearmament and conscription would be announced on 16 March.[6] The Condor Legion, a Luftwaffe detachment sent to aid Nationalist forces in the Spanish Civil War, provided the force with a valuable testing ground for new tactics and aircraft. Partially as a result of this combat experience, the Luftwaffe had become one of the most sophisticated, technologically advanced, and battle-experienced air forces in the world when World War II broke out in 1939.[7] By the summer of 1939, the Luftwaffe had twenty-eight Geschwader (wings). The Luftwaffe also operated Fallschirmjäger paratrooper units.

The Luftwaffe proved instrumental in the German victories across Poland and Western Europe in 1939 and 1940. During the Battle of Britain, however, despite inflicting severe damage to the RAF's infrastructure and, during the subsequent Blitz, devastating many British cities, the German air force failed to batter the beleaguered British into submission. From 1942, Allied bombing campaigns gradually destroyed the Luftwaffe's fighter arm. From late 1942, the Luftwaffe used its surplus ground support and other personnel to raise Luftwaffe Field Divisions. In addition to its service in the West, the Luftwaffe operated over the Soviet Union, North Africa and Southern Europe. Despite its belated use of advanced turbojet and rocket-propelled aircraft for the destruction of Allied bombers, the Luftwaffe was overwhelmed by the Allies' superior numbers and improved tactics, and a lack of trained pilots and aviation fuel. In January 1945, during the closing stages of the Battle of the Bulge, the Luftwaffe made a last-ditch effort to win air superiority, and met with failure. With rapidly dwindling supplies of petroleum, oil, and lubricants after this campaign, and as part of the entire combined Wehrmacht military forces as a whole, the Luftwaffe ceased to be an effective fighting force.

After the defeat of Germany, the Luftwaffe was disbanded in 1946. During World War II, German pilots claimed roughly 70,000 aerial victories, while over 75,000 Luftwaffe aircraft were destroyed or significantly damaged. Of these, nearly 40,000 were lost entirely. The Luftwaffe had only two commanders-in-chief throughout its history: Hermann Göring and later Generalfeldmarschall Robert Ritter von Greim for the last two weeks of the war.

The Luftwaffe was deeply involved in Nazi war crimes. By the end of the war, a significant percentage of aircraft production originated in concentration camps, an industry employing tens of thousands of prisoners.[N 3] The Luftwaffe's demand for labor was one of the factors that led to the deportation and murder of hundreds of thousands of Hungarian Jews in 1944. The Luftwaffe frequently bombed non-military targets, the Oberkommando der Luftwaffe organized Nazi human experimentation, and Luftwaffe ground troops committed massacres in Italy, Greece, and Poland.

History

The Imperial German Army Air Service was founded in 1910 with the name Die Fliegertruppen des deutschen Kaiserreiches, most often shortened to Fliegertruppe. It was renamed the Luftstreitkräfte on 8 October 1916.[8] The air war on the Western Front received the most attention in the annals of the earliest accounts of military aviation, since it produced aces such as Manfred von Richthofen and Ernst Udet, Oswald Boelcke, and Max Immelmann. After the defeat of Germany, the service was dissolved on 8 May 1920 under the conditions of the Treaty of Versailles, which also mandated the destruction of all German military aircraft.

Since the Treaty of Versailles forbade Germany to have an air force, German pilots trained in secret. Initially, civil aviation schools within Germany were used, yet only light trainers could be used in order to maintain the façade that the trainees were going to fly with civil airlines such as Deutsche Luft Hansa. To train its pilots on the latest combat aircraft, Germany solicited the help of the Soviet Union, which was also isolated in Europe. A secret training airfield was established at Lipetsk in 1924 and operated for approximately nine years using mostly Dutch and Soviet, but also some German, training aircraft before being closed in 1933. This base was officially known as the 4th squadron of the 40th wing of the Red Army. Hundreds of Luftwaffe pilots and technical personnel visited, studied and were trained at Soviet air force schools in several locations in Central Russia.[9] Roessing, Blume, Fosse, Teetsemann, Heini, Makratzki, Blumendaat, and many other future Luftwaffe aces were trained in Russia in joint Russian-German schools that were set up under the patronage of Ernst August Köstring.

The first steps towards the Luftwaffe's formation were undertaken just months after Adolf Hitler came to power. Hermann Göring, a World War I ace, became National Kommissar for aviation with former Luft Hansa director Erhard Milch as his deputy. In April 1933 the Reich Aviation Ministry (Reichsluftfahrtministerium or RLM) was established. The RLM was in charge of the development and production of aircraft. Göring's control over all aspects of aviation became absolute. On 25 March 1933 the German Air Sports Association absorbed all private and national organizations, while retaining its 'sports' title. On 15 May 1933, all military aviation organizations in the RLM were merged, forming the Luftwaffe; its official 'birthday'.[10] The National Socialist Flyers Corps (Nationalsozialistisches Fliegerkorps or NSFK) was formed in 1937 to give pre-military flying training to male youths, and to engage adult sport aviators in the Nazi movement. Military-age members of the NSFK were drafted into the Luftwaffe. As all such prior NSFK members were also Nazi Party members, this gave the new Luftwaffe a strong Nazi ideological base in contrast to the other branches of the Wehrmacht (the Heer (Army) and the Kriegsmarine (Navy)). Göring played a leading role in the buildup of the Luftwaffe in 1933–36, but had little further involvement in the development of the force after 1936, and Milch became the "de facto" minister until 1937.[11]

The absence of Göring in planning and production matters was fortunate. Göring had little knowledge of current aviation, had last flown in 1922, and had not kept himself informed of the latest events. Göring also displayed a lack of understanding of doctrine and technical issues in aerial warfare which he left to others more competent. The Commander-in-Chief left the organization and building of the Luftwaffe, after 1936, to Erhard Milch. However Göring, as a part of Hitler's inner circle, provided access to financial resources and materiel for rearming and equipping the Luftwaffe.[12]

Another prominent figure in German air power construction this time was Helmuth Wilberg. Wilberg later played a large role in the development of German air doctrine. Having headed the Reichswehr air staff for eight years in the 1920s, Wilberg had considerable experience and was ideal for a senior staff position.[13] Göring considered making Wilberg Chief of Staff (CS). However, it was revealed Wilberg had a Jewish mother. For that reason, Göring could not have him as CS. Not wishing his talent to go to waste, Göring ensured the racial policy of Nazi Germany did not apply to him. Wilberg remained in the air staff, and under Walther Wever helped draw up the Luftwaffe's principle doctrinal texts, "The Conduct of the Aerial War" and "Regulation 16".[14][15]

The German officer Corps was keen to develop strategic bombing capabilities against its enemies. However, economic and geopolitical considerations had to take priority. The German air power theorists continued to develop strategic theories, but emphasis was given to army support, as Germany was a continental power and expected to face ground operations following any declaration of hostilities.[16]

For these reasons, between 1933 and 1934, the Luftwaffe's leadership was primarily concerned with tactical and operational methods. In aerial terms, the army concept of Truppenführung was an operational concept, as well as a tactical doctrine. In World War I, the Fliegertruppe's initial, 1914–15 era Feldflieger Abteilung observation/reconnaissance air units, each with six two-seater aircraft apiece, had been attached to specific army formations and acted as support. Dive bomber units were considered essential to Truppenführung, attacking enemy headquarters and lines of communications.[17] Luftwaffe "Regulation 10: The Bomber" (Dienstvorschrift 10: Das Kampfflugzeug), published in 1934, advocated air superiority and approaches to ground attack tactics without dealing with operational matters. Until 1935, the 1926 manual "Directives for the Conduct of the Operational Air War" continued to act as the main guide for German air operations. The manual directed OKL to focus on limited operations (not strategic operations): the protection of specific areas and support of the army in combat.[17]

With an effective tactical-operational concept,[18] the German air power theorists needed a strategic doctrine and organization. Robert Knauss [de], a serviceman (not pilot) in the Luftstreitkräfte during World War I, and later an experienced pilot with Lufthansa,[19] was a prominent theorist of air power. Knauss promoted the Giulio Douhet theory that air power could win wars alone by destroying enemy industry and breaking enemy morale by "terrorizing the population" of major cities. This advocated attacks on civilians.[20] The General Staff blocked the entry of Douhet's theory into doctrine, fearing revenge strikes against German civilians and cities.[21]

In December 1934, Chief of the Luftwaffe General Staff Walther Wever sought to mold the Luftwaffe's battle doctrine into a strategic plan. At this time, Wever conducted war games (simulated against France) in a bid to establish his theory of a strategic bombing force that would, he thought, prove decisive by winning the war through the destruction of enemy industry, even though these exercises also included tactical strikes against enemy ground forces and communications. In 1935, "Luftwaffe Regulation 16: The Conduct of the Air War" was drawn up. In the proposal, it concluded, "The mission of the Luftwaffe is to serve these goals."[22][23]

Corum states that under this doctrine, the Luftwaffe leadership rejected the practice of "terror bombing" (see Luftwaffe strategic bombing doctrine).[24] According to Corum, terror bombing was deemed to be "counter-productive", increasing rather than destroying the enemy's will to resist.[25] Such bombing campaigns were regarded as diversion from the Luftwaffe's main operations; destruction of the enemy armed forces.[26]

Nevertheless, Wever recognised the importance of strategic bombing. In newly introduced doctrine, The Conduct of the Aerial Air War in 1935, Wever rejected the theory of Douhet[27] and outlined five key points to air strategy:[28]

To destroy the enemy air force by bombing its bases and aircraft factories, and defeating enemy air forces attacking German targets.
To prevent the movement of large enemy ground forces to the decisive areas by destroying railways and roads, particularly bridges and tunnels, which are indispensable for the movement and supply of forces
To support the operations of the army formations, independent of railways, i.e, armored forces and motorized forces, by impeding the enemy advance and participating directly in ground operations.
To support naval operations by attacking naval bases, protecting Germany's naval bases and participating directly in naval battles
To paralyze the enemy armed forces by stopping production in the armaments factories.
Wever began planning for a strategic bomber force and sought to incorporate strategic bombing into a war strategy. He believed that tactical aircraft should only be used as a step to developing a strategic air force. In May 1934, Wever initiated a seven-year project to develop the so-called "Ural bomber", which could strike as far as into the heart of the Soviet Union. In 1935, this design competition led to the Dornier Do 19 and Junkers Ju 89 prototypes, although both were underpowered. In April 1936, Wever issue requirements for the 'Bomber A' design competition: a range of 6,700 kilometres (4,200 mi) with a 900 kilograms (2,000 lb) bomb load. However Wever's vision of a "Ural" bomber was never realized,[29] and his emphasis on strategic aerial operations was lost.[30] The only design submittal for Wever's 'Bomber A' that reached production was Heinkel's Projekt 1041, which culminated in the production and frontline service as Germany's only operational heavy bomber, the Heinkel He 177, on 5 November 1937, the date on which it received its RLM airframe number.[31]

In 1935, the military functions of the RLM were grouped into Oberkommando der Luftwaffe (OKL; "Air Force High Command").

Following the untimely death of Walther Wever in early June 1936 in an aviation-related accident, by the late 1930s the Luftwaffe had no clear purpose. The air force was not subordinated to the army support role, and it was not given any particular strategic mission. German doctrine fell between the two concepts. The Luftwaffe was to be an organization capable of carrying out broad and general support tasks rather than any specific mission. Mainly, this path was chosen to encourage more flexible use of air power and offer the ground forces the right conditions for a decisive victory. In fact, on the outbreak of war, only 15% of the Luftwaffe's aircraft were devoted to ground support operations, counter to the long-held myth that the Luftwaffe was designed for only tactical and operational missions.[32]

Change of direction, 1936–37
Wever's participation in the construction of the Luftwaffe came to an abrupt end on 3 June 1936 when he was killed along with his engineer in a Heinkel He 70 Blitz, ironically on the very day that his "Bomber A" heavy bomber design competition was announced. After Wever's death, Göring began taking more of an interest in the appointment of Luftwaffe staff officers. Göring appointed his successor Albert Kesselring as Chief of Staff and Ernst Udet to head the Reich's Air Ministry Technical Office (Technisches Amt), although he was not a technical expert. Despite this Udet helped change the Luftwaffe's tactical direction towards fast medium bombers to destroy enemy air power in the battle zone rather than through industrial bombing of its aviation production.[22]

Kesselring and Udet did not get on. During Kesselring's time as CS, 1936–1937, a power struggle developed between the two as Udet attempted to extend his own power within the Luftwaffe. Kesselring also had to contend with Göring appointing "yes men" to positions of importance.[33] Udet realized his limitations, and his failures in the production and development of German aircraft would have serious long term consequences.[34]

Ernst Udet. Along with Albert Kesselring, Udet was responsible for establishing the design trend of German aircraft. Udet's focus was on tactical army support air forces
The failure of the Luftwaffe to progress further towards attaining a strategic bombing force was attributable to several reasons. Many in the Luftwaffe command believed medium bombers to be sufficient power to launch strategic bombing operations against Germany's most likely enemies; France, Czechoslovakia, and Poland.[35] The United Kingdom presented greater problems. General der Flieger Hellmuth Felmy, commander of Luftflotte 2 in 1939, was charged with devising a plan for an air war over the British Isles. Felmy was convinced that Britain could be defeated through morale bombing. Felmy noted the alleged panic that had broken out in London during the Munich crisis, evidence he believed of British weakness. A second reason was technical. German designers had never solved the issues of the Heinkel He 177A's design difficulties, brought on by the requirement from its inception on 5 November 1937 to have moderate dive-bombing capabilities in a 30-meter wingspan aircraft. Moreover, Germany did not possess the economic resources to match the later British and American effort of 1943–1944, particularly in large-scale mass production of high power output aircraft engines (with output of over least 1,500 kW (2,000 hp). In addition, OKL had not foreseen the industrial and military effort strategic bombing would require. By 1939 the Luftwaffe was not much better prepared than its enemies to conduct a strategic bombing campaign,[36] with fatal results during the Battle of Britain.[37]

The German rearmament program faced difficulties acquiring raw materials. Germany imported most of its essential materials for rebuilding the Luftwaffe, in particular rubber and aluminum. Petroleum imports were particularly vulnerable to blockade. Germany pushed for synthetic fuel plants but still failed to meet demands. In 1937 Germany imported more fuel than it had at the start of the decade. By summer 1938, only 25% of the requirements could be covered. In steel materials, industry was operating at barely 83% of capacity, and by November 1938 Göring reported the economic situation was serious.[38] The Oberkommando der Wehrmacht (OKW), the overall command for all German military forces, ordered reductions in raw materials and steel used for armament production. The figures for reduction were substantial: 30% steel, 20% copper, 47% aluminum, and 14% rubber.[39] Under such circumstances, it was not possible for Milch, Udet, or Kesselring to produce a formidable strategic bombing force even had they wanted to do so.[36]

The development of aircraft was now confined to the production of twin-engined medium bombers that required much less material, manpower and aviation production capacity than Wever's "Ural Bomber". German industry could build two medium bombers for one heavy bomber and the RLM would not gamble on developing a heavy bomber which would also take time. Göring remarked, "the Führer will not ask how big the bombers there are, but only how many there are."[40] The premature death of Wever, one of the Luftwaffe's finest officers, left the Luftwaffe without a strategic air force during World War II, which eventually proved fatal to the German war effort.[22][41][42]

The lack of strategic capability should have been apparent much earlier. The Sudeten Crisis highlighted German unpreparedness to conduct a strategic air war (although the British and French were in a much weaker position), and Hitler ordered the Luftwaffe be expanded to five times its earlier size.[43] OKL badly neglected the need for transport aircraft; even in 1943, transport units were described as Kampfgeschwadern zur besonderen Verwendung (Bomber Units on Special Duties, KGzbV).[44] and only grouping them together into dedicated cargo and personnel transport wings (Transportgeschwader) during that year. In March 1938, as the Anschluss was taking place, Göring ordered Felmy to investigate the prospect of air raids against Britain. Felmy concluded it was not possible until bases in Belgium and the Netherlands were obtained and the Luftwaffe had heavy bombers. It mattered little, as war was avoided by the Munich Agreement, and the need for long-range aircraft did not arise.[45]

These failures were not exposed until wartime. In the meantime, German designs of mid-1930s origin such as the Messerschmitt Bf 109, Heinkel He 111, Junkers Ju 87 Stuka, and Dornier Do 17, performed very well. All first saw active service in the Condor Legion against Soviet-supplied aircraft. The Luftwaffe also quickly realized the days of the biplane fighter were finished, the Heinkel He 51 being switched to service as a trainer. Particularly impressive were the Heinkel and Dornier, which fulfilled the Luftwaffe's requirements for bombers that were faster than 1930s-era fighters, many of which were biplanes or strut-braced monoplanes.

Despite the participation of these aircraft (mainly from 1938 onward), it was the venerable Junkers Ju 52 (which soon became the backbone of the Transportgruppen) that made the main contribution. During the Spanish Civil War Hitler remarked, "Franco ought to erect a monument to the glory of the Junkers Ju 52. It is the aircraft which the Spanish revolution has to thank for its victory."[46]

Poor accuracy from level bombers in 1937 led the Luftwaffe to grasp the benefits of dive-bombing. The latter could achieve far better accuracy against tactical ground targets than heavier conventional bombers. Range was not a key criterion for this mission. It was not always feasible for the army to move heavy artillery over recently captured territory to bombard fortifications or support ground forces, and dive bombers could do the job faster. Dive bombers, often single-engine two-man machines, could achieve better results than larger six or seven-man aircraft, at a tenth of the cost and four times the accuracy. This led to Udet championing the dive bomber, particularly the Junkers Ju 87.[47]

Udet's "love affair" with dive-bombing seriously affected the long-term development of the Luftwaffe, especially after General Wever's death. The tactical strike aircraft programs were meant to serve as interim solutions until the next generation of aircraft arrived. In 1936 the Junkers Ju 52 was the backbone of the German bomber fleet. This led to a rush on the part of the RLM to produce the Junkers Ju 86, Heinkel He 111, and Dornier Do 17 before a proper evaluation was made. The Ju 86 was poor while the He 111 showed the most promise. The Spanish Civil War convinced Udet (along with limited output from the German munitions industry) that wastage was not acceptable in munition terms. Udet sought to build dive-bombing into the Junkers Ju 88 and conveyed the same idea, initiated specifically by OKL for the Heinkel He 177, approved in early November 1937. In the case of the Ju 88, 50,000 modifications had to be made. The weight was increased from seven to twelve tons. This resulted in a speed loss of 200 km/h. Udet merely conveyed OKL's own dive-bombing capability request to Ernst Heinkel concerning the He 177, who vehemently opposed such an idea, which ruined its development as a heavy bomber.[48] Göring was not able to rescind the dive-bombing requirement for the He 177A until September 1942.[49]

By the summer of 1939, the Luftwaffe had ready for combat nine Jagdgeschwader (fighter wings) mostly equipped with the Messerschmitt Bf 109E, four Zerstörergeschwader (destroyer wings) equipped with the Messerschmitt Bf 110 heavy fighter, 11 Kampfgeschwader (bomber wings) equipped mainly with the Heinkel He 111 and the Dornier Do 17Z, and four Sturzkampfgeschwader (dive bomber wing") primarily armed with the iconic Junkers Ju 87B Stuka.[50] The Luftwaffe was just starting to accept the Junkers Ju 88A for service, as it had encountered design difficulties, with only a dozen aircraft of the type considered combat-ready. The Luftwaffe's strength at this time stood at 373,000 personnel (208,000 flying troops, 107,000 in the Flak Corps and 58,000 in the Signals Corps). Aircraft strength was 4,201 operational aircraft: 1,191 bombers, 361 dive bombers, 788 fighters, 431 heavy fighters, and 488 transports. Despite deficiencies, it was an impressive force.[51]

However, even by the spring of 1940, the Luftwaffe still had not mobilized fully. Despite the shortage of raw materials, Generalluftzeugmeister Ernst Udet had increased production through introducing a 10-hour working day for aviation industries and rationalizing production. During this period 30 Kampfstaffeln and 16 Jagdstaffeln were raised and equipped. A further five Zerstörergruppen ("Destroyer groups") were created (JGr 101, 102, 126, 152 and 176), all equipped with the Bf 110.[52]

The Luftwaffe also greatly expanded its aircrew training programs by 42%, to 63 flying schools. These facilities were moved to eastern Germany, away from possible Allied threats. The number of aircrew reached 4,727, an increase of 31%. However, the rush to complete this rapid expansion scheme resulted in the deaths of 997 personnel and another 700 wounded. 946 aircraft were also destroyed in these accidents. The number of aircrew completing their training was up to 3,941, The Luftwaffe's entire strength was now 2.2 million personnel.[53]

In April and May 1941, Udet headed the Luftwaffe delegation inspecting the Soviet aviation industry in compliance with the Molotov–Ribbentrop Pact. Udet informed Göring "that Soviet air forces are very strong and technically advanced." Göring decided not to report the facts to Hitler, hoping that a surprise attack would quickly destroy the USSR.[54] Udet realized that the upcoming war on Russia might cripple Germany. Udet, torn between truth and loyalty, suffered a psychological breakdown and even tried to tell Hitler the truth, but Göring told Hitler that Udet was lying, then took Udet under control by giving him drugs at drinking parties and hunting trips. Udet's drinking and psychological condition became a problem, but Göring used Udet's dependency to manipulate him.[55]

Luftwaffe organization
Main article: Organization of the Luftwaffe (1933–45)
Luftwaffe commanders

Defendants in the dock during the Nuremberg trials. The main target of the prosecution was Hermann Göring (at the left edge on the first row of benches), considered to be the most important surviving Nazi official after Hitler's death.
Throughout the history of Nazi Germany, the Luftwaffe had only two commanders-in-chief. The first was Hermann Göring, with the second and last being Generalfeldmarschall Robert Ritter von Greim. His appointment as commander-in-chief of the Luftwaffe was concomitant with his promotion to Generalfeldmarschall, the last German officer in World War II to be promoted to the highest rank. Other officers promoted to the second highest military rank in Germany were Albert Kesselring, Hugo Sperrle, Erhard Milch, and Wolfram von Richthofen.

At the end of the war, with Berlin surrounded by the Red Army, Göring suggested to Hitler that he take over leadership of the Reich.[56] Hitler ordered his arrest and execution, but Göring's SS guards did not carry out the order, and Göring survived to be tried at Nuremberg.[57]

Sperrle was prosecuted at the OKW Trial, one of the last twelve of the Nuremberg Trials after the war. He was acquitted on all four counts. He died in Munich in 1953.
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Airbus A321 Neo X

The Airbus A321 is a member of the Airbus A320 family of short to medium range, narrow-body, commercial passenger twin engine jet airliners;[b] it carries 185 to 236 passengers. It has a stretched fuselage which was the first derivative of the baseline A320 and entered service in 1994, about six years after the original A320. The aircraft shares a common type rating with all other Airbus A320-family variants, allowing previous A320-family pilots to fly the aircraft without the need for further training.

In December 2010, Airbus announced a new generation of the A320 family, the A320neo (new engine option).[2] The similarly lengthened fuselage A321neo variant offers new, more efficient engines, combined with airframe improvements and the addition of winglets (called Sharklets by Airbus). The aircraft delivers fuel savings of up to 15%. The A321neo carries up to 244 passengers, with a maximum range of 4,000 nmi (7,400 km) for the long-range version when carrying no more than 206 passengers.[3]

Final assembly of the aircraft takes place in Hamburg, Germany, and in Mobile, Alabama, United States. As of December 2021, a total of 2,451 A321 airliners have been delivered, of which 2,404 are in service. In addition, another 3,419 aircraft are on firm order (comprising 7 A321ceo and 3,412 A321neo). American Airlines is the largest operator of the Airbus A321 with 262 airplanes in its fleet.[1]

The Airbus A321 was the first derivative of the A320, also known as the Stretched A320, A320-500 and A325.[4][5] Its launch came on 24 November 1988, around the same time as the A320 entered service, after commitments for 183 aircraft from 10 customers were secured.[4][6]

An Airbus A321 on final assembly line 3 in the Airbus Hamburg-Finkenwerder plant
The maiden flight of the Airbus A321 came on 11 March 1993, when the prototype, registration F-WWIA, flew with IAE V2500 engines; the second prototype, equipped with CFM56-5B turbofans, flew in May 1993. Lufthansa and Alitalia were the first to order the stretched Airbuses, with 20 and 40 aircraft requested, respectively. The first of Lufthansa's V2500-A5-powered A321s arrived on 27 January 1994, while Alitalia received its first CFM56-5B-powered aircraft on 22 March 1994.[7] The A321-100 entered service in January 1994 with Lufthansa.

Final assembly for the A321 was carried out in Germany (then West Germany), a first for any Airbus.[8] This came after a dispute between the French, who claimed that the move would incur $150 million (€135 million) in unnecessary expenditure associated with the new plant,[4] and the Germans, who claimed that it would be more productive for Airbus in the long run. The second production line was located in Hamburg, which later produced the smaller Airbus A319 and A318. For the first time, Airbus entered the bond market, through which it raised $480 million (€475 million) to finance development costs.[6] An additional $180 million (€175 million) was borrowed from European Investment Bank and private investors.[9]

The A321 is the largest variant of the A320 family.[10][3] The A321-200's length exceeds 44.5 m (146 ft), increasing maximum takeoff weight to 93,000 kg (205,000 lb).[4] Wingspan remained unchanged, supplementing various wingtip devices. Two suppliers provided turbofan engines for the A321: CFM International with its CFM56 and International Aero Engines with the V2500 engine, both in the thrust range of 133–147 kN (30,000–33,000 lbf).

Over 30 years since launch, the A321 Maximum takeoff weight (MTOW) grew by 20% from the 83 t (183,000 lb) -100 to the 101 t (223,000 lb) A321XLR, seating became 10% more dense with 244 seats, up by 24, and range doubled from 2,300 to 4,700 nmi (4,300 to 8,700 km).[11] By 2019, 4,200 had been ordered—one-quarter of all Airbus single-aisles—including 2,400 neos, one-third of all A320neo orders.[11]

Design

The Airbus A321 is a narrow-body (single-aisle) aircraft with a retractable tricycle landing gear, powered by two wing pylon-mounted turbofan engines. It is a low-wing cantilever monoplane with a conventional tail unit having a single vertical stabilizer and rudder. Changes from the A320 include a fuselage stretch and some modifications to the wing. The fuselage was lengthened by a 4.27 m (14 ft 0 in) plug ahead of the wing and a 2.67 m (8 ft 9 in) plug behind it, making the A321 6.94 m (22 ft 9 in) longer than the A320.[3][10][4][12] The length increase required the overwing window exits of the A320 to be converted into door exits and repositioned in front of and behind the wings.[7] To maintain performance, double-slotted flaps and minor trailing edge modifications were included,[4] increasing the wing area from 124 m2 (1,330 sq ft) to 128 m2 (1,380 sq ft).[13] The centre fuselage and undercarriage were reinforced to accommodate a 9,600 kg (21,200 lb) increase in maximum takeoff weight, taking it to 83,000 kg (183,000 lb).[4]

On 1 December 2010, Airbus launched the A320neo family (neo for New Engine Option) with 500 nmi (930 km) more range and 15% better fuel efficiency, thanks to new CFM International LEAP-1A or Pratt & Whitney PW1000G engines and large sharklets.[15] The lengthened A321neo prototype made its first flight on 9 February 2016.[16] It received its type certification on 15 December 2016.[17] The first entered service in May 2017 with Virgin America.[18]