Origins
During the early 1962, the Israeli Air Force (IAF) introduced the first of its Dassault Mirage IIICJ fighter aircraft.[2] For the next two decades, it would be used as an air supremacy platform, securing the skies from hostile aircraft and achieving an impressive kill record during its service life. The performance of the Mirage IIICJ was soon regarded as being highly positive, leading to the type being considered as a strong contender for further development.[2] During the late 1960s, the IAF came under pressure to acquire additional aircraft for the purpose of replacing in excess of 60 combat aircraft that had been lost during several conflicts between Israel and its neighbours, including the Six-Day War of 1967 and the War of Attrition which followed immediately and continued up to 1970. In addition, an arms race was emerging between Israel and several of its neighbours, such as Syria and Egypt, which were receiving increasingly advanced armaments from the Soviet Union during this time.[3]
Accordingly, during July 1960, Israel had commenced work on a co-development effort with French aircraft manufacturer Dassault Aviation to develop and produce a variant of their highly successful Mirage III fighter aircraft.[4] This product of this programme became known as the Mirage 5 and it was eventually built by Israel and named Raam in Hebrew (thunder). Dassault had pursued the development of the Mirage 5 at the request of the Israelis, who were the main foreign customers of the Mirage III and generally favoured France as a military supplier during this era.[5] Specific requirements established by the IAF for the next version of the type was to de-emphasis the aircraft's all-weather capability and deleting its main radar system in exchange for improved ordnance-carrying capacity and range; this was made possible by the mostly-clear climate and typical weather conditions present in the Middle East.[4]
Even prior to the prototype's maiden flight, Israel placed an order for a batch of 50 aircraft, as well as a pair of trainer aircraft of the type, which were intended for the IAF. However, the programme was effectively derailed during January 1969 when, in response to the 1968 Israeli raid on Lebanon, the French government announced that it would be imposing an arms embargo on Israel and the "warring nations of the Middle East".[4][6][7] The enactment of the embargo prevented the delivery of the first 30 Mirage 5 aircraft, which were already paid for by Israel, in addition to options for 20 more of the type. In addition to preventing further deliveries, it also cut off all French support for operating the IAF's existing Mirage IIICJ fleet.[6] Strategically, the embargo gave a major impetus for Israel to develop the capabilities of its own domestic arms industry in order to meet its demands.[8]
The embargo has been viewed as having been a considerable setback for the IAF, who had been keen to induct the new Mirage 5 variant to compensate for the losses incurred during the Six-Day War, the service was also continuing to use the Mirage IIIC, but found itself unable to access official support. In response to the French decision, Israel decided to domestically manufacture the airframes (known as Raam A and B project);[9] reportedly, Israel already possessed the necessary schematics and documentation on the aircraft, although Israel did not officially obtain a manufacturing license from Dassault. According to aviation author Don McCarthy, it has been speculated that Israeli intelligence agency Mossad had played a role in obtaining some of the manufacturing information, while others allege that Dassault's founder, Marcel Dassault, may have freely provided design information.[6][10]
Production
According to aviation authors Doug Dildy and Pablo Calcaterra, Dassault discreetly provided the jigs, fixtures, and a large quantity of airframe components to Israel via an industrial consortium of Israeli aerospace company Israel Aircraft Industries and American aviation firm North American Rockwell, who were claimed to have been sold a manufacturing licence in January 1968.[10] Reportedly, the first bare airframes, featuring no weapons, electronics, ejection seat, or engine included, had been delivered directly from Dassault in France.[9] Dildy and Calcaterra claimed that detailed information on the aircraft's Atar engine was obtained via Swiss industrial manufacturer Sulzer, who had produced the engine for Switzerland's own Mirages; between these blueprints and possessing several Atar engines of the IAF's existing Mirages to reverse engineer, Israel was able to independently manufacture its own engines.[10]
During 1969, IAI commenced manufacturing activity on the project.[11] Officially, Israel manufactured the aircraft after having obtained a complete set of drawings. However, some sources have alternatively claimed that Israel had received 50 Mirage 5s in a disassembled state and shipped in crates directly from the French Air Force (AdA), while the AdA proceeded to take on the 50 aircraft which had originally been intended for Israeli service.[6][4][12][13] During September 1969, the first Nesher prototype performed its maiden flight. During May 1971, the first Raam A was delivered to the IAF. During November 1971, the aircraft received its official name of Nesher.[9]
The Neshers' airframe was identical to the Mirage 5, but there was an extensive refitting of Israeli-built avionics systems, along with the adoption of a Martin-Baker zero-zero ejection seat,[10] and improved provisions for a wider range of AAMs, including the Israeli Shafrir heat-seeking missile. In total, 51 Nesher fighters (Nesher S) and ten Nesher two-seat trainers (Nesher T) were constructed by IAI. The Nesher featured more simplistic avionics than the IAF's Mirage IIIC, reportedly, it was also slightly less maneuverable. However, it possessed a longer combat range and a larger payload. The reduced maneuverability of the type did not prevent the Nesher from performing well in air combat during the Yom Kippur War of 1973.[14]
During 1974, production of the Nesher was phased out in favour of a more advanced Mirage derivative which had been planned in parallel to the Nesher. The principal difference of this derivative was the replacement of the Atar engine by an Israeli-built General Electric J79 engine. The J79 was a popular American engine for combat aircraft, having already been used on fighters such as the Lockheed F-104 Starfighter and the McDonnell Douglas F-4 Phantom II. The resulting aircraft was given the name IAI Kfir.[15]