Background The origins of the Ju 88 can be traced back to the
Reichsluftfahrtministerium (RLM) and the formulation of a new requirement in 1934 that called for a new multipurpose aircraft. This requirement was issued to a total of four aircraft manufacturers, these being
Focke Wulf,
Henschel,
Junkers, and
Messerschmitt; all firms except Focke Wulf opted to produce a response. and
Ju 88. Both were twin-engined bomber aircraft, the main difference between the two being the Ju 85's use of a twin
fin (and twin
rudder) tail unit while the Ju 88 had a single fin (and rudder) tail unit instead. Following deliberation amongst officials, the RLM decided in favour of the Ju 88. He was assisted by Wilhelm Heinrich Evers and American engineer Alfred Gassner. During its first flight, it managed to reach a speed of about . On 10 April 1937, the first prototype was lost in an accident. Upon reviewing the Ju 88's performance,
Hermann Göring, head of the
Luftwaffe, was reportedly ecstatic; it was allegedly viewed as an aircraft that could finally fulfil the promise of the
Schnellbomber. The streamlined fuselage was modelled after its contemporary, the
Dornier Do 17, but furnished with fewer defensive guns as a result of the belief still held that it could outrun late 1930s-era fighters. During March 1939, the fifth prototype set a closed-circuit record while carrying a payload at a speed of . The first five prototypes had conventionally-operating dual-strut leg rearwards-retracting
main gear, however, starting with the V6 prototype, a main gear design debuted that twisted the new, single-leg main gear strut through 90° during the retraction sequence, much like that of the American
Curtiss P-40 Warhawk fighter. The choice of annular
radiators for engine cooling on the Ju 88, which placed these radiators immediately forward of each engine and directly behind each propeller, allowed the cooling lines for the engine coolant and
oil-cooling radiators (integrated within the annular design) to be as short as possible, with integral port and starboard air intakes for cooling the exhaust headers, the starboard inlet also supplying the inlet air for the supercharger. During autumn of 1938, Dr. Heinrich Koppenberg (managing director of Jumo) assured Göring that a production rate of 300 Ju 88s per month was definitely achievable; indeed, such a rate was achieved during 1940. However, the pre-war ramping up of production was delayed drastically by developmental problems. Although planned for a service introduction in 1938, the Ju 88 finally entered squadron service (with only 12 aircraft) on the first day of the
invasion of Poland in 1939. Production was painfully slow at this point, only a single Ju 88 was being manufactured per week as problems kept cropping up. The Ju 88C series of heavy fighter was also designed in early 1940, but its existence was kept secret from Göring, as he only sought bombers at this time.
Dive bomber ,
Greece, 1943 In October 1937, Ernst Udet had ordered the development of the Ju 88 as a heavy
dive bomber. This decision was influenced by the success of the
Ju 87 Stuka in this role. The Junkers development centre at
Dessau gave priority to the study of pull-out systems and
dive brakes. The first prototype to be tested as a dive bomber was the Ju 88 V4 followed by the V5 and V6. These models became the planned prototype for the A-1 series. The V5 made its maiden flight on 13 April 1938, and the V6 on 28 June 1938. Both the V5 and V6 were fitted with four-blade propellers, an extra bomb bay and a central "control system". Junkers later used the A-4
airframe for the A-17 torpedo carrier, which did not have the undernose
Bola gondola for a ventral gun position. The C-6 was used mostly as
fighter-bomber and therefore assigned to bomber units. As a reaction to the increasing number of attacks on German shipping, especially on U-boats in the
Bay of Biscay, from July 1942 it started flying anti-shipping patrols and escort missions from bases in France.
V./Kampfgeschwader 40 was specifically formed to operate the C-6. The aircraft of V./KG 40 (which was redesignated I./
Zerstörergeschwader 1 in 1943) were a significant threat to antisubmarine aircraft and operated as escort fighters for the more vulnerable
Focke-Wulf Fw 200 Condor maritime patrol bombers. Between July 1942 and July 1944, the Ju 88s of KG 40 and ZG 1 were credited with 109 confirmed air-to-air victories, at a cost of 117 losses. They were finally deployed against the Allied
Invasion of Normandy in June 1944, incurring heavy losses for little effect before being disbanded on 5 August 1944. Some Ju 88 variants were also used as radio controlled bombs in the
Mistel composite aircraft configuration, by coupling a bomber filled with explosive with a fighter such as the
Focke-Wulf Fw 56 or the
Messerschmitt Bf 109E.
Attack bomber The
Ju 88P was a specialized variant for ground attack and to function as a
bomber destroyer, designed starting from 1942 and produced in small numbers, using examples of the
Bordkanone heavy calibre aviation autocannon series, which required the omission of the
Bola undernose gondola for clearance. The prototype, derived from a standard Ju 88 A-4, was armed with a anti-tank gun derived from the
7.5 cm PaK 40 installed in a large conformal
gun pod under the fuselage. This was followed by a small batch of
Ju 88 P-1, which standardized the solid sheet metal nose of the C version for all known examples of the P-series, and used the new PaK 40L semi-automatic gun, also known as the
Bordkanone BK 7,5, which was also meant for use in both the later
Henschel Hs 129B-3 dedicated anti-armor aircraft, and a never-achieved production version of the
He 177A-3/R5 ground-attack
Flak-suppression
Stalingradtyp field-improvised version. The Ju 88P-1 was produced in some 40 units, but with the massive cannon installation resulting in a slow and vulnerable aircraft, The first version of the Ju 88C was the
C-1 with 20 aircraft converted from
A-1 airframes. Many Ju 88C's had their Bola gondolas modified to hold up to two forward firing cannons. Several C-6 night fighters were equipped with two "Schräge-Musik" upward-firing cannons in trial fittings, and from mid 1943 onward, there was an official field modification kit available for this arrangement. A small number of the C-series day fighters had their new solid-metal noses specially painted to resemble the bomber A-series' "beetle's eye" faceted clear view nose glazing, in an attempt to deceive Allied pilots into thinking the fighters were actually bombers; the unusual "camouflage" attempt did result initially in a number of Allied aerial losses.
Ju 88R The Ju 88R series night fighters were basically versions of the Ju 88 C-6, powered by
unitized BMW 801 radial engines. The R-1 had BMW 801L engines and the R-2 had BMW 801 G-2 engines. One of the first aircraft from the R-1 series that went into service (
Werknummer 360 043) was involved in one of the most significant defections from the
Luftwaffe. On 9 May 1943, this night fighter (D5+EV), which was stationed with 10./
NJG 3 in Aalborg Denmark, flew to the RAF Station at Dyce (now
Aberdeen Airport) with its entire crew and complete electronic equipment on board. The fact that Spitfire Vb fighters No.165 (Ceylon) Squadron escorted it towards the end of its flight could indicate that its arrival had been expected. It was immediately transferred to
Farnborough Airfield, received RAF markings and serial number PJ876, and was tested in great detail. The preserved aircraft is on exhibit at the
Royal Air Force Museum Midlands, as one of the first two intact Ju 88s in aviation museums. The
Luftwaffe learned of this defection only the following month when members of the crew, pilot
Oberleutnant Heinrich Schmitt (son of the former secretary to the ministry for foreign affairs (1923–1929) Gustav Stresemann) and
Oberfeldwebel Paul Rosenberger made broadcasts on British radio. The third crew-member, Erich Kantwill, refused to co-operate with the British and was treated as a regular
prisoner of war.
Ju 88G All previous night fighter versions of the Ju 88 used a modified A-series fuselage. The
G-series fuselage was purpose-built for the special needs of a night fighter, with the A-series'
Bola ventral under-nose defensive gun position omitted for lower aerodynamic
drag and less weight, and adding the enlarged squared-off
vertical fin/
rudder tail unit of the
Ju 188.
G-1 aircraft possessed more powerful armament and like the earlier R-1, used a pair of
BMW 801 radial engines, the G-1 using the later BMW 801G-2 version. Electronic equipment consisted of the then-standard FuG 220 Lichtenstein SN-2 90 MHz VHF radar using eight-dipole
Hirschgeweih antennas, which could include fitment of the borderline-
SHF-band FuG 350 Naxos radar detector with its
receiving antenna housed in a teardrop-shaped streamlined fairing above the canopy, or
FuG 227 Flensburg radar detector homing devices that had their own trio of twin-dipole antennae: one on each wing leading edge and one under the tail. One Ju 88G-1 of 7.
Staffel/
NJG 2 was flown by mistake to
RAF Woodbridge in July 1944, giving the Royal Air Force its first chance to check out the VHF-band Lichtenstein SN-2 radar and Flensburg radar detector gear. equipped with the FuG 240 Berlin
cavity magnetron radar, with smooth
radome nose
G-6 versions were equipped with
Jumo 213A inverted V-12 engines (using the same redesigned annular radiator cores as the Ju 188s powered by them), enlarged fuel tanks and often one or two
MG 151/20 cannons in a
Schräge Musik ("Jazz Music", i.e. slanted) installation. These guns were pointed obliquely upwards and forwards from the upper fuselage – usually at an angle of 70°. Only about 15 of the Berlin systems were completed before
V-E Day. Many
Luftwaffe night fighter aces, such as
Helmut Lent (110 victories) and
Heinrich Prinz zu Sayn-Wittgenstein (87 victories) flew Ju 88s during their careers. ==Operational history==