Lockheed Martin and Rafael are to develop jointly an improved version of the Israeli Python 4 air-to-air missile in a venture that could signal Lockheed Martin's entry into the air-to-air missile business as a US competitor to Raytheon .

The two companies signed an agreement in May to form a joint venture to market the Python 4 and develop an improved version, the Python 4I (Improved).

The changes on the weapon are believed to centre on an improved infrared seeker and a rocket motor giving increased range.

According to the agreement, Rafael will transfer air-to-air missile expertise to Lockheed Martin's electronics and missiles division, enabling it to develop advanced missiles in addition to marketing the Python 4.

The US company has not previously been involved in development of air-to-air missiles, although several of the companies Lockheed Martin has acquired in recent years had been involved in programmes such as the Sidewinder short-range missile.

Rafael and Lockheed Martin also cooperate in the manufacture of the Rafael Popeye (AGM-142) television-guided air-to-surface missile, a deal which was the model for the Python 4I agreement.

Lockheed Martin has offered the weapon to users and potential users of its F-16 fighter, including, it is believed, Chile and Denmark.

Source: Flight International