Messerschmitt Bf 109

Bayerische Flugzeugwerke (BFW)

Industry	Aerospace, Aircraft manufacturing
Founded	1916 (as Bayerische Flugzeugwerke)
Fate	Renamed Messerschmitt AG
Successor	Messerschmitt
Headquarters	Augsburg , Germany

Overview

The Messerschmitt Bf 109' represents a family of monoplane fighter aircraft initially engineered and manufactured by the German company Bayerische Flugzeugwerke (BFW), later known as Messerschmitt. Alongside the Focke-Wulf Fw 190, it constituted the core of the Luftwaffes fighter fleet throughout the Second World War. Despite being officially designated as Bf 109, Allied pilots and some German aviators frequently referred to it as the Me 109.

Designed during the early to mid-1930s by engineers Willy Messerschmitt and Robert Lusser at BFW, the Bf 109 was originally intended as an interceptor. However, subsequent variants expanded its operational roles to include bomber escort, fighter-bomber missions, day and night fighting, all-weather operations, ground attack, and aerial reconnaissance. At its debut, it was among the most technologically advanced fighters, featuring an all-metal monocoque frame, enclosed cockpit canopy, retractable landing gear, and a liquid-cooled inverted V12 engine. Its maiden flight took place on 29 May 1935, with introduction into service following in early 1937; its combat debut occurred during the Spanish Civil War.

Throughout World War II, the Bf 109 was supplied to multiple allied nations and saw action on nearly every front within Europe. It remained operational until the war's conclusion in 1945 and continued to be utilized by various air forces for years afterward. With a production total of 34,248 units between 1936 and April 1945, it stands as the most extensively manufactured fighter aircraft in history. Notably, part of its production involved forced labor within Nazi concentration camps.

The aircraft was piloted by the three highest-scoring fighter aces in history, who collectively achieved 928 aerial victories primarily while serving with Jagdgeschwader 52 on the Eastern Front. Erich Hartmann holds the record with 352 confirmed kills. Hans-Joachim Marseille distinguished himself as the top ace in the North African theater with 158 victories over a relatively short period. Additionally, many foreign aces flying for Germany operated the Bf 109; among them was Finnish pilot Ilmari Juutilainen, credited with 58 of his 94 victories in this type. Pilots from Hungary, Romania, Bulgaria, Croatia, Slovakia, and Italy also flew this fighter extensively. Through ongoing enhancements throughout its service life, the Bf 109 maintained competitiveness against contemporary Allied fighters until war’s end.

Design and development

Origins

In 1933, the Technisches Amt (C-Amt), the technical division of the Reichsluftfahrtministerium (RLM) ("Reich Aviation Ministry"), completed a series of studies focused on the future of aerial combat. These investigations resulted in the identification of four primary categories for forthcoming aircraft:

• Rüstungsflugzeug I: a multi-crew medium bomber
• Rüstungsflugzeug II: a tactical bomber
• Rüstungsflugzeug III: a single-seat fighter
• Rüstungsflugzeug IV: a two-seat heavy fighter

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Bf 109 G6 in flight

The Rüstungsflugzeug III was designed to serve as a short-range interceptor, intended to replace the existing Arado Ar 64 and Heinkel He 51 biplanes in service at the time. By late March 1933, the RLM had issued tactical specifications for a single-seat fighter under document L.A. 1432/33.

The fighter was expected to reach a maximum speed of 400 km/h (250 mph) at an altitude of 6,000 m (20,000 ft), sustaining this velocity for 20 minutes, with an overall endurance of 90 minutes. It was required to attain the critical altitude of 6,000 metres within no more than 17 minutes and possess an operational ceiling of 10,000 m (33,000 ft). The powerplant specified was the newly developed Junkers Jumo 210 engine, delivering approximately 522 kW (710 PS; 700 hp). Armament options included either a single 20 mm MG C/30 cannon mounted to fire through the propeller hub as a Motorkanone, two synchronized 7.92 mm (.312 in) MG 17 machine guns mounted on the engine cowling, or one lightweight engine-mounted 20 mm MG FF cannon combined with two 7.92 mm MG 17s. The MG C/30 represented an airborne variant of the 2 cm FlaK 30 anti-aircraft gun, firing powerful "Long Solothurn" rounds; however, it was heavy and had a relatively low rate of fire. Additionally, wing loading was mandated to remain below 100 kg/m². Performance evaluation prioritized level speed first, followed by rate of climb and maneuverability.

There has been speculation that Bayerische Flugzeugwerke (BFW) was initially excluded from the competition due to personal conflicts between Willy Messerschmitt and RLM director Erhard Milch; however, recent investigations by Willy Radinger and Walter Shick suggest this might not be accurate since all three contenders—Arado, Heinkel, and BFW—were awarded development contracts for meeting L.A. 1432/33 requirements simultaneously in February 1934. A fourth manufacturer, Focke-Wulf, received its contract copy later in September 1934. The planned engine was the Junkers Jumo 210; nevertheless, provisions allowed for substitution with the more powerful but less mature Daimler-Benz DB 600. Each company was tasked with producing three prototypes for comparative testing scheduled for late 1934.

Prototypes

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Messerschmitt Bf 109 V1

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A schematic of the V1 prototype

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Prototype V3

Development of the Messerschmitt Project P.1034 commenced in March 1934, merely three weeks following the award of the development contract. By May, a basic mock-up had been finalized, and a more comprehensive design mock-up was completed by January 1935. The Reichsluftfahrtministerium (RLM) assigned the designation "Bf 109" to this design, selecting the next available number from a series allocated to Bayerische Flugzeugwerke (BFW).

The initial prototype, known as Versuchsflugzeug 1 or V1, bore the civilian registration D-IABI and was finished by May 1935; however, the intended German engines were not yet available. To enable flight testing of the "R III" designs, the RLM procured four Rolls-Royce Kestrel VI engines by exchanging a Heinkel He 70 Blitz, which served as an engine test platform for Rolls-Royce. Messerschmitt received two of these engines and modified the V1 engine mounts to accommodate the upright V-12 configuration. At the end of May 1935, V1 conducted its maiden flight at the airfield in Augsburg-Haunstetten's southern district, piloted by Hans-Dietrich "Bubi" Knoetzsch. After four months of evaluation flights, the aircraft was handed over in September to the Luftwaffe's central testing facility at Erprobungsstelle Rechlin to participate in a design competition.

In 1935, with the introduction of the first Jumo engines, V2 was completed in October powered by the 449 kW (610 PS; 602 hp) Jumo 210A engine. Subsequently, V3 was developed as the first prototype equipped with armament; however, its maiden flight was delayed until May 1936 due to difficulties in acquiring another Jumo 210 engine.

Design competition

Following completion of acceptance tests at the Luftwaffe's primary testing site Erprobungsstelle (E-Stelle) located at Rechlin, prototypes were transferred to the subordinate Baltic coast facility at Travemünde for direct comparative evaluation. The competing aircraft included the Arado Ar 80 V3, Focke-Wulf Fw 159 V3, Heinkel He 112 V4, and Bf 109 V2. The He 112 arrived first in early February 1936, with other prototypes following by month’s end.

Initially, Luftwaffe pilots accustomed to biplanes featuring open cockpits, low wing loading, mild g-forces, and straightforward handling—such as those flying the Heinkel He 51—were skeptical about the Bf 109. Nevertheless, it quickly emerged as a leading contender when compared to Arado and Focke-Wulf designs intended as backup options should either front-runner fail. The Arado Ar 80’s gull wing (later replaced with a straight tapered wing on V3) and fixed spatted undercarriage rendered it overweight and underpowered; after three prototypes were built, development ceased. The parasol-winged Fw 159—likely influenced by Focke-Wulf’s earlier Fw 56—was regarded by Travemünde staff as a compromise between biplane and efficient low-wing monoplane designs. Despite incorporating advanced elements, its innovative retractable main landing gear proved unreliable.

File:Bundesarchiv Bild 101I-337-0036-02A, Im Westen, Feldflugplatz mit Me 109.jpg

JG 53 Bf 109E-3, circa 1939/1940

Test pilots at E-Stelle initially viewed the Bf 109 unfavorably due to its pronounced nose-high stance on the ground that limited forward visibility during taxiing; additionally, its side-hinged cockpit canopy could not be opened in flight (though it could be jettisoned in emergencies). Concerns were also raised about its relatively high wing loading.

The Heinkel He 112—a smaller derivative of the Blitz Heinkel He 70—was favored among Luftwaffe leadership and was less expensive than the Bf 109. Advantages included a wide-track and sturdy landing gear that retracted outward from mid-wing (unlike the Bf 109’s gear folding inward from wing roots), improved cockpit visibility, and lower wing loading facilitating easier landings. Moreover, the V4 featured a single-piece sliding canopy offering unobstructed views and was powered by an upgraded Jumo 210Da engine with modified exhausts. However, structural complexity made it approximately 18% heavier than the Bf 109. Its thick wingspan of 12.6 m (41 ft 4 in) covering an area of 23.2 m² (249.7 ft²) on prototype V1 adversely affected roll rate and maneuverability—critical factors for a lightweight fighter. Consequently, for trials, Heinkel introduced new wings on V4 measuring 11.5 m (37 ft 8.75 in) with an area of 21.6 m² (232.5 ft²). Yet these modifications were not fully validated before evaluation flights began, preventing compliance with Acceptance Commission regulations and placing it at a disadvantage.

Due to its smaller and lighter airframe, the Bf 109 outpaced the Heinkel He 112 by approximately 30 km/h (20 mph) in level flight and demonstrated superior climbing and diving performance. Ultimately, the Commission favored the Bf 109 after Messerschmitt’s test pilot exhibited exceptional control during spins, dives, flick rolls, and tight turns.

In March, upon learning that Britain had committed to producing the Supermarine Spitfire, urgency increased to expedite production of Germany’s preferred fighter design. Consequently, on March 12th, RLM issued a directive titled Bf 109 Priority Procurement, mandating immediate production of the Bf 109 while instructing Heinkel to undertake a comprehensive redesign of their He 112 model. The Messerschmitt Bf 109 made its public debut during the 1936 Berlin Olympics when prototype V1 was flown before an international audience.

Design characteristics

Following the precedent set by the earlier Bf 108, the Bf 109's design adhered to Messerschmitt's "lightweight construction" philosophy, which focused on reducing the number of individual components in the aircraft. A notable illustration of this was the incorporation of two substantial, intricate brackets mounted on the firewall. These brackets combined the lower engine mounts with the landing gear pivot point into a single assembly. Additionally, a large forged component attached to the firewall contained the main spar attachment points and bore the majority of the wing loading. Unlike typical contemporary designs that distributed primary load-bearing elements across various sections of the airframe through multiple strong-points, consolidating these loads at the firewall allowed for a simpler and lighter structural design for the Bf 109.

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A Bf 109E displayed at the Royal Air Force Museum London with its wings temporarily detached, 2016

One benefit arising from this configuration was that the main landing gear, retracting through an 85-degree arc, was affixed directly to the fuselage. This arrangement enabled complete removal of the wings for maintenance without requiring additional support for the fuselage. It also simplified wing construction, as the wings were not subjected to landing or takeoff stresses. However, a significant disadvantage was the narrow wheel track, which compromised ground stability. To mitigate this, the landing gear legs were angled outward slightly, but this introduced another issue: takeoff and landing forces were transmitted up through the legs at an angle.

The Bf 109’s relatively small rudder had limited effectiveness in countering the pronounced swing caused by the propeller’s powerful slipstream during initial takeoff acceleration. This sideways movement placed uneven stress on the wheel opposite to the swing direction. Excessive forces could cause failure at the pivot point, resulting in collapse of the landing gear leg into its bay. While seasoned pilots generally managed this swing without difficulty, less experienced aviators sometimes lost control during takeoff.

Due to its long landing gear legs creating a steep ground angle, forward visibility while taxiing was notably poor—a problem worsened by the sideways-opening canopy design. Pilots therefore had to maneuver in a zigzag pattern on the ground, which placed additional strain on the splayed undercarriage legs. Ground mishaps were particularly prevalent among inexperienced pilots, especially later in the war when training time was reduced before deployment. Approximately 10% of all Bf 109s were lost due to takeoff and landing accidents, with around 1,500 incidents recorded between 1939 and 1941. The fitting of fixed "tall" tailwheels on some late G-10s, G-14s, and K-series models significantly alleviated these issues.

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Automatically deploying leading edge slats on a Bf 109E. The use of high-lift devices greatly enhanced handling characteristics.

From its earliest design stages, ease of access to key systems such as the engine and fuselage armament was prioritized to facilitate operations from forward airfields. The entire engine cowling consisted of large panels secured by toggle latches that could be quickly removed. Beneath the wing center section was a sizable panel providing access to an L-shaped main fuel tank positioned partly beneath the cockpit floor and extending behind the rear cockpit bulkhead. Additional smaller panels allowed straightforward servicing of cooling and electrical systems. The engine itself was mounted on two large forged Elektron magnesium alloy Y-shaped legs—one on each side—that straddled the engine block and cantilevered from the firewall. Each leg was secured by two quick-release screws attached to the firewall. Key pipe connections were color-coded and grouped where feasible, while electrical components connected via junction boxes mounted on the firewall. This modular design enabled rapid removal or replacement of the entire powerplant within minutes—a precursor to later German aircraft adopting unitized powerplant mountings known as Kraftei.

Another innovative aspect was the wing’s single I-beam main spar located further aft than usual to accommodate wheel retraction space, creating a rigid D-shaped torsion box structure. While most contemporary aircraft employed two spars near leading and trailing edges respectively, this D-box arrangement provided superior torsional stiffness and eliminated the need for a rear spar. The wing utilized NACA 2R1 profiles—14.2% thickness-to-chord ratio at the root tapering to 11.35% at the tip.

A distinctive feature compared to rival designs was its comparatively high wing loading. Although specifications called for less than 100 kg/m² wing loading under contract R-IV, Messerschmitt considered this unrealistic; low wing loading combined with available engines would have resulted in fighters slower than their bomber targets.

Designed primarily for high-speed performance, minimizing wing area helped achieve greater velocity but compromised low-speed handling due to reduced lift generation at lower airspeeds. To counteract this drawback, advanced high-lift devices were incorporated into the wings, including automatically deploying leading edge slats and substantial camber-changing flaps along trailing edges. Deployment of these slats significantly increased lift during critical phases such as turning maneuvers—enhancing horizontal agility as confirmed by Luftwaffe veterans like Erwin Leykauf.

Fighters powered by liquid-cooled engines were vulnerable to damage in their cooling systems; therefore, later Bf 109 F, G, and K variants featured dual coolant radiators equipped with cutoff valves. In case one radiator sustained damage or leakage, pilots could continue flying using either radiator alone or even with both shut off for several minutes.

In 1943, Oberfeldwebel Edmund Roßmann landed behind Soviet lines and agreed to demonstrate maintenance procedures for his aircraft. Soviet machine gun technician Viktor M. Sinaisky recalled:

Armament and Gondola-Mounted Cannons

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A Bf 109E-3 from JG 51 'Mölders' displayed at the Deutsches Museum in Munich, highlighting the 20 mm MG FF installations within the wings.

Adhering to Messerschmitt's philosophy of lightweight, streamlined monoplanes, the primary weaponry was installed within the fuselage. This design choice allowed the wings to remain narrow and lightweight. Two synchronized machine guns were positioned in the engine cowling, firing over the engine and through the propeller arc. Another configuration featured a single autocannon firing through a blast tube situated between the engine’s cylinder banks, known in German as a Motorkanone mount. This approach was also used in other contemporary monoplane fighters like the French Dewoitine D.520 and American Bell P-39 Airacobra, tracing its origins back to World War I’s limited production of French SPAD S.XII moteur-canon fighters armed with 37 mm cannons.

In 1937, upon learning that the RAF intended to equip their new Hawker Hurricane and Supermarine Spitfire fighters with eight machine guns, it was decided that the Bf 109 should receive enhanced firepower. The only feasible location for extra guns was within the wings, but each wing had space for only one weapon between the wheel well and leading-edge slats, accommodating either a 7.92 mm MG 17 machine gun, a 20 mm MG FF, or a 20 mm MG FF/M cannon.

The C-1 model marked the first Bf 109 variant equipped with wing-mounted guns, featuring one MG 17 in each wing. To avoid redesigning wings for larger ammo boxes and access panels, engineers devised an unconventional ammunition feed system: a continuous belt of 500 rounds was routed along chutes to the wingtip, looped around a roller, then returned forward beneath the gun breech to the wing root, where it circled another roller before feeding back into the weapon.

The gun barrel was housed inside a long tube of large diameter positioned between the spar and leading edge. This tube directed cooling airflow around both barrel and breech, venting through an exhaust slot at the wing’s rear. The cramped installation caused parts of the MG 17’s breech mechanism to intrude into an opening fashioned within the flap structure.

For the heavier and longer MG FF cannon, mounting was relocated further outboard in an outer wing bay. A substantial aperture was cut through the spar to allow ammunition feed ahead of it, while the breech extended rearward through the spar itself. A 60-round drum magazine sat near the wing root beneath a bulge on the underside, which included a small hatch for drum replacement. Removal of a leading-edge panel permitted full servicing access to this armament.

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Luftwaffe ground personnel positioning a Bf 109G-6 fitted with underwing gondola cannons from the Rüstsatz VI kit. Note the leading-edge slat on the port wing. JG 2, France, late 1943.

Starting with the Bf 109F series, internal wing guns were eliminated in favor of a single 20 mm cannon firing through the propeller shaft. While prominent fighter aces like Adolf Galland and Walter Oesau disapproved of this change, others such as Werner Mölders felt that one nose-mounted cannon adequately compensated for losing two wing guns. Galland personally modified his Bf 109F-2 by installing an internal 20 mm MG FF/M autocannon in each wing; here, "/M" denoted compatibility with thin-walled 20 mm mine shells.

To supplement internal armament, additional firepower came from two underwing conformal pods each housing a 20 mm MG 151/20 cannon. These pods alone weighed approximately 135 kg (298 lb) without ammunition; each gun received between 135 and 145 rounds, bringing total weight including ammo to about 215 kg. Installing these gun pods was straightforward and could be accomplished swiftly by unit armourers; their presence reduced maximum speed by only 8 km/h (5.0 mph). By contrast, two internally mounted MG 151/20 cannons on an Fw 190A-4/U8 weighed around 130 kg (287 lb) without ammunition.

While this increased firepower improved effectiveness against bombers, it negatively affected handling characteristics during fighter engagements by diminishing maneuverability and increasing pendulum-like swinging tendencies in flight.

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Cockpit view of a Bf-109 G-6/R3

Certain planned variants in the Bf 109K series—such as the K-6—were intended to carry heavier armament with wing-mounted 30 mm (1.18 in) MK 108 cannons.

Designation and nicknames

Main article: RLM aircraft designation system

The initial designation assigned by the RLM to the aircraft was Bf 109, reflecting its origin from the Bayerische Flugzeugwerke (which translates as "Bavarian Aircraft Works" or "Bavarian Aircraft Factory" and is sometimes abbreviated as B.F.W., similar to BMW) during the year 1935. The company underwent a name change to Messerschmitt AG on 11 July 1938 after Erhard Milch authorized Willy Messerschmitt to take ownership. Subsequent Messerschmitt designs, including models like the Me 210, adopted the "Me" prefix. Despite official RLM directives, wartime records from Messerschmitt AG, the RLM, and Luftwaffe strength and loss reports frequently used both "Bf" and "Me" designations interchangeably, occasionally appearing together on the same document.

Every surviving airframe displays the official "Bf 109" marking on their identification plates, including those of the last K-4 variants. The aircraft was commonly called 'Me 109' by Allied forces as a colloquial term.

Both operators and adversaries often referred to the fighter as Messer, a nickname that not only shortened the manufacturer's name but also corresponds to the German word for "knife". In Finland, it was known as Mersu, a term that originally (and still) denotes Mercedes-Benz automobiles in Finnish.

Soviet pilots gave the Bf 109 the moniker "the skinny one" (худо́й, khudoy) due to its slender profile compared to sturdier types like the Fw 190.

The variant letter designations (e.g., Bf 109G – "Gustav") inspired nicknames such as "Anton", "Berta", "Caesar", "Dora", "Emil", "Friedrich", "Gustav", and "Kurfürst", derived from the World War II German spelling alphabet—a method also applied to other German aircraft models. Luftwaffe personnel referred to the G-6 version as Die Beule ("the bump" or "bulge") because of its distinctive bulging cowling covers over the breeches of the 13 mm (.51 in) MG 131 machine guns. These separate Beule covers were removed by the time the G-10 model introduced a subtly reshaped upper cowling.

Record-setting flights

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Bf 109G-10 (Messerschmitt foundation) flight demonstration

Shortly after its public introduction in July 1937, three Bf 109Bs participated in the Flugmeeting airshow held in Zürich, led by Major Seidemann. They secured several victories: first place in a speed competition over a 202 km course, first prize in class A at the international Alpenrundflug military aircraft contest, and triumph in the international Patrouillenflug category.

On 11 November 1937, Messerschmitt's chief test pilot Dr. Hermann Wurster flew the Bf 109 V13, registered D-IPKY, powered by a 1,230 kW (1,672 PS; 1,649 hp) DB 601R racing engine, establishing a new world airspeed record for piston-engined landplanes at 610.95 km/h (379.63 mph)—marking Germany’s first achievement of this record. This V13 model was converted from a Bf 109D and equipped with a specialized DB 601R engine capable of delivering 1,230 kW (1,672 PS; 1,649 hp) briefly. Both FAI records and contemporary sources such as Flight International documented this aircraft under the designation Messerschmitt Bf 113 (or Bf 113R).

Following their rejection in the 1936 design competition with the He 112, Heinkel developed and produced the He 100. On 6 June 1938, Ernst Udet piloted He 100 V3 to set a new speed record of 634.7 km/h (394.4 mph). Later, on 30 March 1939, test pilot Hans Dieterle improved this achievement by reaching 746.61 km/h (463.92 mph) with He 100 V8. However, Messerschmitt reclaimed supremacy on 26 April 1939 when Flugkapitän Fritz Wendel flew the (Me) Me 209 V1 to a record-breaking speed of 755.14 km/h (469.22 mph). For propaganda purposes, this Me 209 V1 was designated Me 109R—a post-July-1938 prefix not applied to operational wartime Bf 109 fighters. The Me 209 V1 was driven by a DB 601ARJ engine rated at 1,156 kW (1,550 hp), with potential output up to 1,715 kW (2,300 hp). This piston-engined aircraft speed record stood until it was surpassed in 1969 by Darryl Greenamyer’s modified Grumman F8F Bearcat, named Conquest I, which achieved 777 km/h (483 mph).

Variants

Main article: Messerschmitt Bf 109 variants

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Bf 109E-3 airborne, 1940

Conceived in 1934 by a design team led by Willy Messerschmitt and Robert Lusser, the Bf 109 was intended primarily as a rapid, short-range interceptor. It incorporated cutting-edge aerodynamic principles and featured structural innovations that surpassed those of its contemporaries. During the initial phase of World War II, the Bf 109 was the Luftwaffe’s sole single-engine fighter until the introduction of the Fw 190. Production of the aircraft spanned from 1937 to 1945, encompassing numerous variants and subtypes. The main powerplants were the Daimler-Benz DB 601 and DB 605, while earlier pre-war models mostly utilized the Junkers Jumo 210 engine. The Bf 109G series was the most extensively produced model, with over one-third of all Bf 109s being G-6 variants—approximately 12,000 units manufactured from March 1943 until war’s end. Early production versions (A through D series) were equipped with relatively low-powered Junkers Jumo 210 engines rated between 670–700 PS (493–515 kW; 661–690 hp). Some prototypes from this period were adapted to utilize the more potent DB 600 engine.

The first major redesign appeared with the E series, which included a naval variant known as the Bf 109T (with "T" denoting Träger, or carrier). The Bf 109E (nicknamed Emil) featured structural modifications to support the heavier, more powerful 1,100 PS (809 kW; 1,085 hp) Daimler-Benz DB 601 engine, enhanced armament, and increased fuel capacity. Due to its limited combat radius of approximately 300 kilometres (190 mi) when relying solely on internal fuel—resulting from a maximum range near 660 kilometres (410 mi)—later E-series models incorporated a fuselage ordnance rack for fighter-bomber roles or provisions for a standardized 300 litres (66 imp gal; 79 US gal) drop tank. These versions also employed the higher-output DB 601N engine. The Bf 109E was first deployed operationally with the "Condor Legion" during the concluding stage of the Spanish Civil War and served as the principal Luftwaffe fighter from early World War II until mid-1941, when it was superseded by the Bf 109F in frontline fighter roles. (Postwar, eight Bf 109Es were assembled in Switzerland in 1946 by Dornier-Werke using licensed airframes; an additional ninth aircraft was assembled from spare parts.)

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Bf 109F-4 of JG 3 near Reims, France

The second significant redesign occurred between 1939 and 1940, resulting in the F series. Known as Friedrich, this variant introduced redesigned wings, an updated cooling system, and refined fuselage aerodynamics. Powerplants included the 1,175 metric horsepower (864 kW) DB 601N (F-1 and F-2) or the more powerful 1,350 metric horsepower (990 kW) DB 601E (F-3 and F-4). Widely regarded as the pinnacle of Bf 109 development, the F series eliminated wing-mounted cannons in favor of concentrating armament within the forward fuselage: two synchronized machine guns above and a single Motorkanone cannon (15 or 20 mm) firing through the propeller hub between cylinder banks. This cannon was housed beneath a more streamlined half-elliptical spinner that complemented the reshaped engine cowling, replacing the smaller conical spinner characteristic of earlier Emil models. Additionally, stabilizer lift struts present on previous versions were removed from this design. The aerodynamic enhancements introduced with the F series influenced all subsequent variants. Some Bf 109Fs participated late in the Battle of Britain during 1940; however, widespread deployment began only in early to mid-1941.

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Cockpit of a Bf 109 Gustav

Introduced in mid-1942, the G series, dubbed Gustav, initially differed little from its predecessor—the F series—with primary distinction being installation of a more powerful 1,475 metric horsepower (1,085 kW) Daimler-Benz DB 605 engine (variants G-1 through G-4). Odd-numbered G variants were designed as high-altitude fighters featuring pressurized cockpits and GM-1 nitrous oxide boost systems; even-numbered models served as unpressurized air superiority fighters or fighter-bombers. Additionally, specialized long-range photo-reconnaissance versions were developed. Later G-series models (G-5 through G-14) were produced in a wide array of configurations equipped with upgraded weaponry and outfitted with factory-installed modular kits called Umrüst-Bausätze ("conversion kits," often contracted as Umbau), which appended a "/U" suffix to their designations when applied. Field-installed kits known as Rüstsatz ("Rüstsätze") were also available but did not alter official aircraft titles. By early 1944, tactical demands led to integration of MW-50 water injection boosts and advanced superchargers that elevated engine output between 1,800–2,000 PS. From early that year onward, select G-2 through G-6 models were converted into two-seat trainers designated G-12s; these included an additional instructor cockpit behind the pilot’s seat covered by an extended glazed canopy.

The final production iteration was the K series, or Kurfürst, introduced late in 1944 and powered by a DB 605D engine delivering up to 2,000 PS. Although externally similar to late-production G-series aircraft, it incorporated extensive internal modifications and aerodynamic refinements that enhanced performance and addressed prior shortcomings—maintaining competitiveness against contemporary Allied and Soviet fighters. The Bf 109’s exceptional climb rate surpassed numerous Allied opponents such as the P-51D Mustang, Spitfire Mk XIV, and Hawker Tempest Mk V.

Following World War II, production continued outside Germany: in Czechoslovakia as Avia S-99 and Avia S-199 (with twenty-five S-199 aircraft serving in Israel’s air force during its formative years in 1948), and in Spain as Hispano Aviación Ha 1109 and Ha 1112 models.

Production

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Assembly line of Bf 109G-6 aircraft within a German aviation manufacturing facility.

The overall output of the Bf 109 reached 33,984 units; wartime production, spanning from September 1939 to May 1945, accounted for 30,573 of these. Fighters represented 47% of the total German aircraft manufactured during the period, with the Bf 109 making up 57% of all fighter models produced in Germany. Prior to the war, from 1936 until August 1939, a total of 2,193 Bf 109 A–E variants were constructed.

In January 1943, aiming to boost fighter manufacturing, Messerschmitt authorized an SS-affiliated firm, DEST, to fabricate components for the Bf 109 at the Flossenbürg concentration camp. Messerschmitt contributed expert engineers, raw materials, and equipment, while the SS supplied forced laborers; this collaboration proved financially advantageous for both entities. Production operations commenced in February. The workforce of prisoners assigned to Messerschmitt expanded significantly following the bombing of Messerschmitt's Regensburg factory on August 17, 1943. The subcontractor Erla set up subcamps linked to Flossenbürg to facilitate production: one at Johanngeorgenstadt, established in December 1943 for manufacturing Bf 109 tailplanes, and another at Mülsen-St. Micheln starting January 1944 for wing production. By February 1944, when Regensburg was bombed again during "Big Week", the Flossenbürg camp network had become a vital source of Bf 109 parts. Enhancing output at Flossenbürg was critical to reestablishing production after these air raids.

The Austrian resistance movement headed by Heinrich Maier successfully relayed detailed plans and information about Messerschmitt Bf 109 manufacturing facilities in Austria to Allied forces beginning in 1943. This intelligence enabled Allied bombers to conduct highly precise "targeted" bombing operations.

Following the August 1943 attack on Regensburg, some Bf 109 production shifted to Gusen concentration camp in Austria, where prisoner survival averaged six months. To protect these new manufacturing sites from aerial bombardment, prisoners were compelled to excavate tunnels for relocating production underground—a perilous task resulting in numerous fatalities. By mid-1944, over one-third of Regensburg's production originated from Flossenbürg and Gusen combined; only final assembly remained at Regensburg. Additionally, Erla employed thousands of forced laborers at Buchenwald concentration camp for Bf 109 manufacturing. At Buchenwald, approximately 300 fuselages, tail sections, and wings were produced through forced labor before war’s end.

After World War II, approximately 865 derivatives of the Bf 109G were produced under license as Czechoslovak-built Avia S-99 and S-199 aircraft until production ceased in 1948. Spanish-manufactured versions—the Hispano Aviación HA-1109 and HA-1112 Buchon—continued in production until 1958.

Production figures for new Messerschmitt Bf 109 fighters between 1936 and 1945.

Factory and Location	Up to 1939	1939	1940	1941	1942	1943	1944	1945*	Total*
Messerschmitt GmbH, Regensburg				203	486	2,164	6,329	1,241	10,423
Arado, Warnemünde				370					370
Erla Maschinenwerk, Leipzig				683	875	2,015	4,472	1,018	9,063
Gerhard-Fieseler-Werke, Kassel				155					155
W.N.F., Wiener Neustadt				836	1,297	2,200	3,081	541	7,955
Győri Vagon- és Gépgyár, Győr					4	220	399	10	633
AGO, Oschersleben (later switched to Fw 190A production)				381					381
Totals	1,860	1,540	1,868	2,628	2,662	6,609	14,281	2,800	34,248

* Figures include production through March 1945 only.

Variant	Number Produced	Production Years
Bf 109A	22	1937–1938
Bf 109B	341	1937–1938
Bf 109C	58	Spring–Late 1938
Bf 109D	647	1938–1939
Bf 109E-1	1,183	Late 1938–1940
Bf 109E-3	1,276	1939–1940
Bf 109E-4	561	1939–1940
Bf 109E-5	19	1939–1940
Bf 109E-7	438	August 1940–1941
Bf 109F-1	208	July 1940–January 1941
Bf 109F-2	1,384	October 1940–August 1941
Bf 109F-3	15	October 1940–January 1941
Bf 109F-4	1,841	May 1941–May 1942
Bf 109F-5	1	October 1940
Bf 109G-1	167	February–June 1942
Bf 109G-2	1,587	May 1942–February 1943
Bf 109G-3	50	January 1943
Bf 109G-4	1,246	September 1942–May 1943
Bf 109G-5	475	February 1943–June 1944
Bf 109G-5/AS (converted)	16	April–June 1944
Bf 109G-6 (standard)	~5,000+	February–August/October 1943
Bf 109G-6 with Erla canopy	~2,000+	August/September 1943–March 1944
Bf 109G-6 with Erla canopy, enlarged tail and MW-50 boost system	~5,000+	January–September 1944
Bf 109G-6/AS with MW-50 boost system	226 produced +460 converted	April–August 1944
Bf 109G-8	906	August 1943–February 1945
Bf 109G-10 (many conversions)	2,600+	September 1944–March 1945
Bf 109G-10/AS (uncertain status)	100	September–November 1944
Bf 109G-12 (planned/converted)	500 planned	December 1943–July 1944
Bf 109G‑14		5,500+		July 1944–February 1945
Bf 109G‑14/AS		~1,373+		July 1944 – March 1945
Bf 109K‑4		1,700+		August 1944 – March 1945
Bf 109K‑6		1 prototype		Autumn 1944
Totals	36,901 including conversions

Operational history

Main article: Messerschmitt Bf 109 operational history

File:Bf 109A from the Condor Legion with Nationalist Spain markings.jpg

Bf 109A operated by the Condor Legion during the Spanish Civil War (1936–1939)

The initial deployment of the Bf 109A occurred during the Spanish Civil War. By the outbreak of World War II in September 1939, the Bf 109 had established itself as the Luftwaffe’s primary fighter, supplanting earlier biplane models and playing a crucial role in securing air dominance for the Wehrmacht in the war’s early campaigns. During the Battle of Britain, it was utilized extensively as an escort fighter—a function it was not originally engineered for—and also served widely as a fighter-bomber and photo-reconnaissance aircraft. Although its performance over Britain yielded mixed outcomes, the introduction of the enhanced Bf 109F in early 1941 restored its effectiveness during operations such as the Invasion of Yugoslavia—where both sides deployed it—the Battle of Crete, Operation Barbarossa (the invasion of the USSR), and the Siege of Malta.

In 1942, the Bf 109 began to be gradually supplanted in Western Europe by the newer Focke-Wulf Fw 190, yet it remained active across diverse theaters including the Eastern Front, the Defense of the Reich, and the Mediterranean Theatre of Operations, as well as within Erwin Rommel's Afrikakorps. Additionally, Germany supplied this fighter to several allied nations such as Italy, Finland, Hungary, Romania, Bulgaria, Croatia, and Slovakia.

The Bf 109 achieved more aerial victories than any other World War II aircraft. Many of these successes occurred against inadequately trained and poorly coordinated Soviet forces during Barbarossa in 1941. The Soviet Union lost approximately 21,200 aircraft during this period, with roughly half attributed to combat engagements. Luftwaffe pilots who were downed often managed to land or parachute within friendly lines and subsequently returned to combat. As Allied advances brought fighting closer to German territory, bombing raids presented ample targets for Luftwaffe operations. This combination—alongside the late arrival of long-range American escort fighters early in 1944 that eventually secured Allied daylight air superiority over Germany—enabled unprecedented individual pilot victory tallies. One hundred and five Bf 109 pilots each achieved over 100 confirmed kills. Thirteen surpassed 200 aerial victories, and two exceeded 300. Collectively, these pilots accounted for nearly 15,000 enemy aircraft destroyed. Although the Luftwaffe did not formally recognize a Flying ace designation—using instead Experte (expert) to denote seasoned pilots regardless of kill count—applying the Allied criterion of five or more kills identifies over 2,500 Luftwaffe fighter pilots as aces during WWII. Finnish Bf 109Gs operating against Soviet forces recorded an impressive kill ratio of 25:1.

Postwar, Bf 109s continued service with foreign air forces for many years. They were among the first aircraft used by the nascent Israeli Air Force. Switzerland operated their Bf 109Gs well into the 1950s, while Finland retired theirs only in March 1954. Romanian forces retained their Bf 109s until 1955. Spain’s Hispano Aviación-built variants remained operational into the late 1960s. These aircraft also appeared in motion pictures—most notably Battle of Britain—where they portrayed Bf 109Es; some Hispano airframes were later sold to museums and restored to represent original Bf 109 models.

Operators

Note: The following compilation lists only those operators who deployed Bf 109s in active duty or combat roles. It excludes nations such as France, the Soviet Union, the United Kingdom, and the United States, which utilized limited numbers of captured planes strictly for testing and assessment purposes (refer to: Messerschmitt Bf 109 operational history#Allied Bf 109s).

File:Messerschmitt Bf 109G-2.jpg

Finnish Messerschmitt Bf 109G-2s stationed at Helsinki-Malmi, June 1943

File:Messerschmitt Bf 109E Romania.jpg

Romanian Bf 109E-3

File:Avia-S199-hatzerim-2.jpg

Israeli Air Force's Czechoslovak-produced Avia S-199 displayed at the Israeli Air Force Museum

File:Hispano Aviación Ha 1112 Buchon.jpeg

The Hispano Aviación HA-1112 Buchon

File:Swiss Messerschmitt Bf 109-E3 top left view.jpg

Swiss Air Force's Bf 109E-3 preserved at the Flieger-Flab-Museum

File:Bf109 messerschmitt.JPG

Yugoslav Air Force Bf 109G-2 exhibited at the Aeronautical Museum Belgrade

Bulgaria

• The Bulgarian Air Force operated a fleet comprising 19 E-3 models and 145 variants of G-2/-6/-10.

Template:Flagcountry

• The Zrakoplovstvo Nezavisne Države Hrvatske fielded over 50 Bf 109s, including E-4, F-2, and several G-series models such as G-2/-6/-10 and Ks.

Template:Country data Czechoslovakia – (captured)

• Postwar, the Czechoslovak Air Force operated seized aircraft and continued production of Messerschmitt Bf 109Gs under the Avia S-99 designation. Production was hindered after a warehouse explosion in Krásné Březno destroyed many Daimler-Benz DB 605 engines.

Template:FIN

• The Finnish Air Force procured 162 units from Germany, consisting of 48 G-2s, 111 G-6s, and three G-8s. Three were lost during shipment, leaving Finland with 159 operational Bf 109s. Finnish pilots achieved 663 aerial victories between 1943 and 1944 using the Bf 109 G variants while sustaining combat losses of 34 aircraft (with 20 downed by enemy fighters). Additionally, there were 23 non-combat losses and other write-offs. A total of 102 Bf 109 Gs remained by war's end.

Greece – (captured)

• Following the German retreat in October 1944, the Royal Hellenic Air Force operated several captured G-6 models.

Template:Country data Nazi Germany

• The primary user of the Bf 109 was the Luftwaffe.

Template:Country data Kingdom of Hungary

• The Royal Hungarian Air Force deployed a diverse inventory including three D-1s, fifty E-3/-4s, sixty-six F-4s, and approximately four hundred ninety G-series aircraft spanning G-2 to G-14 variants.Template:Fix/category

Template:Country data Israel

• The Israeli Air Force flew the Avia S-199, a derivative produced in Czechoslovakia. Despite performance limitations, Israeli pilots secured eight confirmed kills. Conversely, Egypt and Syria claimed four S-199 shootdowns plus one probable.

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• In early to mid-1943, the Regia Aeronautica operated several dozen Bf 109 units.

Template:Country data Italian Social Republic

• The Aeronautica Nazionale Repubblicana fielded approximately three hundred G-series aircraft (G-6/-10/-14), two G-12s, and received three K-4 models.

Template:Country data Empire of Japan

• In 1941, the Imperial Japanese Army Air Force acquired five E-7 aircraft for testing and evaluation purposes.

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• The Royal Romanian Air Force operated a significant number of aircraft including fifty E-3/4s, nineteen E-7s, two F-2s, five F-4s, more than two hundred G-series models (G-2/G-4/G-6/-8), along with one hundred twenty-four IAR assembled Ga variants (Ga-2/Ga-4/Ga-6).
• Postwar operations continued under the Romanian Air Force.

Template:Country data Slovak Republic (1939–1945)

• The Slovak Air Force utilized sixteen E-3s, fourteen E-7s, and thirty G-6 models.
• During the Slovak National Uprising, the Slovak Insurgent Air Force employed three G-6 aircraft.

Template:Country data Spanish State

• The Spanish Air Force operated several D-1 and E-3 types along with fifteen F-4 models. It is possible that a number of older B-types were also received. Volunteers from Escuadrilla Azul on the Eastern Front flew E-series variants (E-4, E-7, E7/B), F-series (F-2, F-4) within JG-27 under Luftflotte 2 until April 1943, as well as G-series aircraft (G-4 and G-6) assigned to JG-51 under Luftflotte 4 until June 1944. The license-built variant named Hispano Aviación HA-1112 remained in production until 1958.

Template:SUI

• The Swiss Air Force operated ten D-1 units, eighty-nine E-3a variants, two F-4 models, and fourteen G-6 aircraft.

Template:TUR – (captured)

• Two aircraft were seized by the Turkish Air Force following emergency landings.

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• The Royal Yugoslav Air Force operated seventy-three E-3a variants.
• Later on, the SFR Yugoslav Air Force flew several ex-NDH and Bulgarian Bf 109Gs.

Surviving aircraft

Main article: List of surviving Messerschmitt Bf 109s

Specifications (Bf 109G-6)

File:Bf109G 3Seiten neu.jpg

Three-view illustration of the Bf 109G-6.

References

Bibliography

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Further reading

• Andreev, J. and Boshniakov, S., Les Messerschmitt 109 bulgares (fin), Avions: Toute l'aéronautique et son histoire, December 1998, no. 69, pp. 24–30 (French; translated title: Bulgarian Messerschmitt 109s)
• Avila Cruz, Gonzalo, Bipalas, Tripalas and Knapsacks: Messerschmitt Bf 109s in Spanish Service, Air Enthusiast, vol. 87, May–June 2000, pp. 62–71
• Beale, Nick; D'Amico, Ferdinando; Valentini, Gabriele, Air War Italy: Axis Air Forces from Liberation of Rome to the Surrender, Airlife, Shrewsbury, UK, 1996
• Bergström, Christer and Pegg, Martin, Jagdwaffe: The War in Russia, January–October 1942, Luftwaffe Colours series vol. 3, Classic Colours Publications, London, UK, 2003
• Burke, Stephen, Without Wings: The Story of Hitler's Aircraft Carrier, Trafford Publishing, Oxford, UK, 2007
• Caldwell, Donald L., JG 26: Top Guns of the Luftwaffe, Ballantine Books, New York, US, 1991
• Craig, James F., The Messerschmitt Bf.109, Arco Publishing Company, New York, US, 1968
• Grasset, Philippe, Encore un "Gustave" tout neuf!: Le Messerschmitt Bf 109G du National Air and Space Museum des USA à Washington, Le Fana de l'Aviation, May 1976, no. 78, pp. 32–35 (French; translated title: Return of a Brand New "Gustav": The Messerschmitt Bf 109G of the National Air and Space Museum in Washington)
• Hitchcock, Thomas H., Messerschmitt 'O-Nine' Gallery, Monogram Aviation Publications, Chicago, US, 1973
• Holmes, Tony, Spitfire vs Bf 109: Battle of Britain, Osprey Publishing, Oxford/New York, 2007
• Hooton, Edward R., Blitzkrieg in the West, 1939–1940 (Luftwaffe at War: 2), Midland Publishing, Hersham Surrey UK, 2007
• Jackson, Robert, Aircraft of World War II: Development, Weaponry, Specifications, Chartwell Books Edison NJ USA 2003
• Kulikov Victor , “Des occasions en or pour Staline ou les avions allemands en URSS” Avions No.84 March 2000 pp.16–23 (French; translated title: Golden Opportunities for Stalin or German Aircraft in the USSR)
• Kulikov Victor , “Des occasions en or pour Staline ou les avions allemands en URSS” Avions No.85 April 2000 pp.44–49 (French)
• Mankau Heinz and Petrick Peter , ‘’Messerschmitt Bf 110 / Me 210 / Me 410’’, Aviatic Verlag GmbH , Germany , 2001
• Marshall Francis L., Messerschmitt Bf 109T "Die Jäger der Graf Zeppelin", Marshall-Verlag Gilching Germany ,2002
• Marshall Francis L., Sea Eagles: The Messerschmitt Bf 109T, Air Research Publications Walton on Thames Surrey UK ,1994
• Mason Francis K., Messerschmitt Bf 109B C D E in Luftwaffe & Foreign service, Osprey Publishing Limited London UK ,1973
• Massimello Giovanni and Apostolo Giorgio , ‘’Italian Aces of World War Two’’, Osprey Publishing Oxford/New York ,2000
• Osché Philippe and Laureau Patrick , ‘’The Messerschmitt Bf 109 in Swiss Service’’, Lela Presse Boulogne sur Mer France ,1996
• Price Alfred , ‘’Spitfire Mk.I/II Aces (Osprey’s Aircraft of the Aces)’’, Osprey London UK ,1996
• Punka György , ‘"Messer" : the Messerschmitt 109 in the Royal Hungarian "Honvéd" Air Force’, OMIKK Budapest Hungary ,1995
• Radinger Willy and Schick Walter , ‘’Messerschmitt Me 109 (Alle Varianten: von Bf(Me)109A bis Me109E)’’, Aviatic Verlag GmbH Oberhaching Germany ,1997
• Rimmell Ray , ‘’ME109 : Messerschmitt Bf109E’’, Linewrights Ltd. Chipping Ongar Essex UK ,1986
• Scutts Jerry , ‘’Bf109 Aces of North Africa and the Mediterranean’’, Osprey Publishing Oxford UK ,1994
• Shores Christopher ; Cull Brian ; Malizia Nicolae , ‘’Air War for Yugoslavia Greece & Crete – 1940–41’’, Grub Street London UK ,1987
• Starr Chris , ‘’Developing Power: Daimler-Benz and the Messerschmitt Bf109’’, Aeroplane Magazine Volume33 Issue5 #385 May2005 IPC Media Ltd London UK
• Stenman Kari and Keskinen Kalevi , ‘’Finnish Aces of World War2 (Osprey Aircraft of the Aces No.23)’’, Osprey Publishing Limited London UK ,1998
• Taylor John W.R., Messerschmitt Bf109, G.P.Putnam’s Sons New York US ,1969
• Thompson J.Steve and Smith Peter C., Air Combat Manoeuvres, Ian Allan Publishing Hersham Surrey UK ,2008
• U.S. Army Air Force , German Aircraft and Armament: Informational Intelligence Summary No.44-32 October1944’’, Brassey’s Inc New York US ,2000
• Vogt Harald , ‘’Messerschmitt Bf109 G/K Rüstsätze Flugzeug Profile No.21’’, Flugzeug Publikations GmbH Illertissen Germany
• Weal John , ‘’Bf109 Aces of the Russian Front’’, Osprey Oxford UK ,2001
• Weal John , ‘’BF109D/E Aces1939-41’’, Osprey Oxford UK ,1996
• Weal John , ‘’Bf109F/G/K Aces of the Western Front’’, Osprey Oxford UK ,2000
• Winchester Jim , Messerschmitt Bf109, Grange Books plc Kent UK ,2004

External links

• Messerschmitt Bf 109G-10 – National Museum of the United States Air Force
• Detailed Specifications, Blueprints, and Plans of the Messerschmitt Bf 109