Bf 110C-4 Specifications
Crew: Pilot and air gunner
Powerplant: Two 1,150 hp Daimler-Benz DB 601A-1 twelve-cylinder liquid-cooled engines
Span: 53 ft 4¾ in (16.27 m)
Length: 39 ft 8½ in (12.11 m)
Max Speed: 563 km/h (349 mph) at 22,960 ft (6,998 m)
Armament: Four 7.92 mm MG 17 machine guns and two 20 mm MG FF/M cannon in nose, one rear-firing 7.92 mm MG 15 machine gun in cockpit
Image: Messerschmitt Bf 110C of 6.Staffel/ZG 76 (M8+EP) over the English Channel, August 1940.
Introduction
The Messerschmitt Bf 110 was a German twin-engined heavy fighter developed to fulfil the Luftwaffe’s requirement for a high-speed, long-range and heavily armed Zerstörer, or “destroyer”. Conceived as a multi-role aircraft capable of sweeping ahead of German bomber formations, it was expected to penetrate deep into enemy airspace, engage defending fighters and destroy hostile bombers with concentrated forward firepower.
The concept attracted considerable opposition within the Luftwaffe. Critics argued that a twin-engined fighter would inevitably become too large and heavy to compete with more agile single-seat aircraft. Hermann Göring nevertheless remained convinced that Germany required a long-range fighter and pressed for development of the Kampfzerstörer to proceed rapidly.
Early campaigns appeared to justify the confidence placed in the aircraft. The Bf 110 performed effectively against the Polish, Belgian, Dutch and French air forces, while its range and powerful nose armament made it well suited to bomber interception, reconnaissance and ground attack. During the Battle of Britain, however, the aircraft’s weak acceleration and limited manoeuvrability left it dangerously exposed to the RAF’s Supermarine Spitfire and Hawker Hurricane.
Although its reputation as a daylight escort fighter was severely damaged in 1940, the Bf 110 proved far more adaptable than the campaign suggested. It subsequently served as a fighter-bomber, reconnaissance aircraft and, most successfully, a radar-equipped night fighter. In these specialised roles, the aircraft remained valuable to the Luftwaffe until the final months of the Second World War.
Development and Design
The Bf 110 was developed at Bayerische Flugzeugwerke under the direction of Willy Messerschmitt and his chief engineer, Walter Rethel. Convinced that an aircraft built strictly to the official Kampfzerstörer specification would become too heavy and unwieldy, they disregarded several of its requirements and concentrated instead on speed, firepower and overall combat performance.
The original specification called for an all-metal, three-seat twin-engined monoplane equipped with flexibly mounted cannon and an internal bomb bay. Focke-Wulf and Henschel followed these requirements more closely and initially received contracts to construct three prototypes apiece. Messerschmitt appeared to have been excluded until the intervention of First World War fighter ace Ernst Udet helped the company secure a contract for three examples of its more streamlined design.
Concern over the viability of the Kampfzerstörer concept led the Reichsluftfahrtministerium to revise its requirement in the spring of 1935. The multi-role specification was divided between a dedicated Schnellbomber, or fast bomber, and a more specialised Zerstörer intended primarily to destroy enemy bombers. Messerschmitt’s leaner, performance-focused design was particularly well suited to the latter role.
Following static testing and taxiing trials at Augsburg-Haunstetten, the Bf 110 V1 made its maiden flight on 12 May 1936 with Rudolf Opitz at the controls. Powered by two Daimler-Benz DB 600A liquid-cooled inverted-V engines, the prototype reached approximately 314 mph (505 km/h) in level flight despite persistent engine reliability problems.
Test pilots reported marginal stability at low and medium speeds but generally good handling at higher speeds. Weak acceleration and poor manoeuvrability were already evident, however, while a tendency to swing violently during take-off and landing foreshadowed the ground-handling problems that affected the aircraft throughout its career.
The Bf 110 V2 first flew on 24 October 1936 and was delivered to the Erprobungsstelle at Rechlin on 14 January 1937 for official evaluation. The Messerschmitt comfortably outperformed the rival Focke-Wulf Fw 57 and Henschel Hs 124 in the dedicated bomber-destroyer role, prompting Göring to demand that production begin without delay.
Entry Into Luftwaffe Service and the Second World War
The proposed Bf 110A production model was intended to use two 986 hp Daimler-Benz DB 600Aa engines. Persistent problems with the powerplant led to its abandonment in favour of the improved DB 601, forcing the cancellation of the A series. Delays to the new engine then compelled Messerschmitt to adopt the 680 hp Junkers Jumo 210Ga for the interim Bf 110B.
The first of ten pre-production Bf 110B-1s flew on 19 April 1938, and production aircraft began reaching I.(Z)/LG 1 during the autumn. Only 45 Bf 110Bs were completed because the Jumo engines provided inadequate performance for combat. The aircraft nevertheless played an important developmental role, allowing Luftwaffe crews to evaluate its equipment and armament and formulate tactics for the projected heavy fighter units.
By late 1938, the problems affecting the 1,100 hp Daimler-Benz DB 601A-1 had largely been resolved, permitting production of the definitive Bf 110C-1. In addition to the more powerful fuel-injected engines, the C model replaced the deep radiator bath beneath each engine with shallow glycol radiators mounted beneath the wings. Small oil coolers were incorporated into the lower sections of the engine nacelles.
Ten pre-production Bf 110C-0s were delivered for service evaluation in January 1939, becoming the first aircraft in the series equipped with direct fuel injection. By the end of the month, production Bf 110C-1s had reached I.(Z)/LG 1, followed by deliveries to I./ZG 1 and I./ZG 76 during the spring and early summer.
By 31 August 1939, the Luftwaffe had accepted 159 Bf 110Cs, with production underway at Messerschmitt, Focke-Wulf, Gothaer Waggonfabrik and MIAG. Their crews were largely handpicked from Messerschmitt Bf 109 units, giving the new Zerstörergruppen elite status. German propaganda further surrounded the aircraft with an aura of invincibility.
Approximately 90 serviceable Bf 110s were committed to the invasion of Poland. The aircraft subsequently operated during the defence of the Heligoland Bight and the campaigns in Norway, France and the Low Countries. Its heavy forward-firing armament proved highly effective when attacking bombers and less capable opposition, but combat against increasing numbers of British fighters exposed its vulnerability. By the end of the Battle of France, 35% of the 355 Bf 110Cs committed to the campaign had been lost.
The Bf 110 in the Battle of Britain
Losses suffered during the Battle of France were rapidly replaced, and on 20 July 1940 Luftflotten 2, 3 and 5 could field 278 Bf 110C and D fighters. The Luftwaffe began the Battle of Britain with 237 serviceable Bf 110s and expected the aircraft’s superior endurance to make it an effective long-range escort and fighter-sweep platform.
Under the planned strategy, Bf 110 formations would use their range to draw RAF squadrons into battle. German bomber formations would then arrive after the defending fighters had exhausted their fuel or returned to their airfields to refuel and rearm. The bombers and strafing Bf 110s would theoretically be able to attack with greatly reduced opposition.
The plan proved unworkable almost immediately. Although the Bf 110’s forward armament was lethal, its pilots struggled to manoeuvre onto the tails of the more agile Spitfires and Hurricanes. The aircraft lacked the speed and acceleration required to disengage, while the radio operator’s single rearward-firing 7.9 mm machine gun offered little protection against attacks from astern.
When confronted by single-seat fighters in strength, Bf 110 units frequently formed defensive circles in which each aircraft protected the tail of the one ahead. This allowed several gunners to fire upon fighters attacking the formation’s perimeter, but it surrendered the initiative and prevented the Bf 110 from fulfilling its intended role of cutting a path through the British defences. RAF pilots referred to the formation as the “circle of death”.
Losses rapidly became unsustainable. Nearly thirty Bf 110s were shot down on 15 August 1940, approximately the strength of an entire Gruppe, and another twenty-three were lost on 16 and 17 August. During August alone, 120 Bf 110s were destroyed. Although the Luftwaffe recognised the need to withdraw the Zerstörer from the aerial offensive, shortages of Bf 109s and the single-seat fighter’s limited range forced Bf 110 units to continue operating into September. A further eighty-three aircraft were lost by the end of that month.
Attrition was so severe that several Gruppen had to be disbanded because of shortages of aircraft and trained crews. During the final weeks of the campaign, surviving Bf 110s were increasingly restricted to long-range reconnaissance and fighter-bomber operations. The specialised Bf 110C-5 reconnaissance variant, fitted with an Rb 50/30 camera in the cockpit floor, had begun reaching Aufklärungsgruppen during the early summer of 1940.
The most effective Bf 110 operations of the campaign were conducted by Erprobungsgruppe 210. Tasked with developing fighter-bomber tactics, the unit operated Bf 110C-4/Bs equipped with two ETC 250 racks carrying two 250 kg (551 lb) bombs. Beginning with attacks against British shipping in the Channel during July, its crews flew singly or in small groups at low altitude, using terrain-following approaches and surprise to strike their targets with considerable success.
It is believed that 223 Bf 110s were lost during the Battle of Britain. The campaign decisively disproved the belief that the aircraft could defeat modern single-engine fighters in daylight combat, but its performance with Erprobungsgruppe 210 demonstrated that it remained effective when employed in roles suited to its range, firepower and load-carrying ability.
Strengths and Limitations
The Bf 110’s principal strengths were its endurance, concentrated forward firepower and versatility. Its nose-mounted guns gave it a powerful, accurate attack without the convergence problems associated with wing-mounted weapons. When attacking from a position of advantage, the Bf 110’s concentrated nose armament could deliver a devastating weight of fire.
Its range allowed it to accompany bombers farther than most single-engined fighters, while its stable airframe provided a useful platform for reconnaissance, ground attack and low-level strike missions. The spacious cockpit and large canopy offered good visibility, and the second crew member could assist with navigation, radio communication and observation. These qualities made the Bf 110 effective in roles that exploited its endurance and weapons rather than demanding close manoeuvring combat.
Its size and weight, however, resulted in poor acceleration and limited agility. The Bf 110 could neither turn with the Spitfire and Hurricane nor disengage easily once a more manoeuvrable fighter had gained the advantage. Its large profile also made it comparatively easy to see and attack, while awkward handling during take-off and landing presented additional difficulties for its crews.
The rear gun provided only limited protection, and the crew initially lacked adequate armour. During the Battle of Britain, escort duties forced the Bf 110 into the kind of sustained daylight combat for which it was least suited. Defensive circles could offer mutual protection, but they surrendered the initiative and sometimes required Bf 109s to protect the escorts themselves. The aircraft’s failure in this role reflected a mismatch between its capabilities and its employment rather than an absence of value as a combat aircraft.
Legacy
The Battle of Britain marked the failure of the Bf 110 as a daylight air-superiority and close-escort fighter, but it did not end the aircraft’s operational importance. Its range, firepower, spacious airframe and ability to carry additional equipment allowed it to transition into roles better suited to its characteristics, including fighter-bomber, reconnaissance, ground-attack and bomber-interception missions.
The Bf 110 achieved its greatest later success as a night fighter. Equipped with airborne-interception radar and, on some aircraft, upward-firing Schräge Musik cannon, it became a formidable opponent for Allied bombers during the Defence of the Reich. Later variants such as the Bf 110G-4 remained in service with night-fighter units including NJG 1 and NJG 4 into 1945.
The career of Hans-Joachim Jabs illustrated this transformation. After flying the Bf 110C in daylight combat over France and southern England, he retrained as a night-fighter pilot in late 1941. By the end of the war, he had completed 710 missions and achieved fifty victories, including twenty-eight at night.
The Bf 110 never fulfilled the sweeping claims originally made for the Zerstörer concept, but its long service demonstrated the underlying adaptability of the design. Thoroughly outclassed as a daylight fighter, it nevertheless became one of the Luftwaffe’s most valuable specialised aircraft when employed in roles for which its endurance, weapon capacity and multi-seat crew were genuine advantages.
Frequently Asked Questions
What was the Messerschmitt Bf 110?
The Messerschmitt Bf 110 was a German twin-engined heavy fighter developed as a Zerstörer, or “destroyer”. It was intended to operate ahead of bomber formations, engage enemy fighters and destroy hostile bombers with its concentrated nose armament.
Who designed the Messerschmitt Bf 110?
The Bf 110 was developed at Bayerische Flugzeugwerke under the direction of Willy Messerschmitt and chief engineer Walter Rethel. They rejected several elements of the official Kampfzerstörer specification and concentrated on producing a faster, more effective combat aircraft.
When did the Bf 110 first fly?
The Bf 110 V1 made its maiden flight from Augsburg-Haunstetten on 12 May 1936 with Rudolf Opitz at the controls. It was powered by two Daimler-Benz DB 600A engines and reached approximately 314 mph in level flight.
When did the Bf 110 enter Luftwaffe service?
The first pre-production Bf 110B-1 flew on 19 April 1938, and production aircraft began reaching I.(Z)/LG 1 during the autumn. The definitive DB 601-powered Bf 110C entered service at the beginning of 1939.
What engines powered the Bf 110?
The V1 prototype used two Daimler-Benz DB 600A engines. The interim Bf 110B was fitted with underpowered Junkers Jumo 210Ga engines, while the Bf 110C introduced two 1,100 hp Daimler-Benz DB 601A-1 engines with direct fuel injection.
What armament did the Bf 110 carry?
The Bf 110C-4 carried two 20 mm cannon and four 7.9 mm machine guns in the nose, together with a rearward-firing 7.9 mm machine gun operated from the rear cockpit. Fighter-bomber variants could also carry between 500 and 1,000 kg of bombs externally.
How many Bf 110s were available during the Battle of Britain?
On 20 July 1940, Luftflotten 2, 3 and 5 could field 278 Bf 110C and D fighters. The Luftwaffe began the campaign with 237 serviceable Bf 110s.
Why did the Bf 110 struggle during the Battle of Britain?
The Bf 110 lacked the acceleration and manoeuvrability required to compete with the Spitfire and Hurricane. Its pilots struggled to bring the aircraft’s heavy forward armament to bear, while the single rear machine gun provided inadequate protection against attacks from behind.
How many Bf 110s were lost during the Battle of Britain?
It is believed that 223 Bf 110s were lost during the campaign. Nearly thirty were shot down on 15 August 1940, followed by another twenty-three on 16 and 17 August. During August alone, 120 Bf 110s were destroyed.
Was the Bf 110 an effective fighter-bomber?
Yes. Erprobungsgruppe 210 used Bf 110C-4/B fighter-bombers with considerable success during the Battle of Britain. Flying singly or in small groups at low altitude, its crews used terrain-following approaches and surprise to attack British shipping and other targets.
Was the Bf 110 a successful night fighter?
The Bf 110 became far more successful as a night fighter than it had been as a daylight escort. Its spacious airframe could accommodate airborne-interception radar and additional armament, while later versions remained in night-fighter service until 1945.
What was the Bf 110’s greatest strength?
The aircraft’s greatest strength was its adaptability. Its endurance, concentrated nose armament, bomb-carrying capacity and spacious multi-seat airframe allowed it to serve effectively in fighter-bomber, reconnaissance, ground-attack and night-fighter roles.