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Russia secretly aiding Iran in development of supersonic cruise missile technology: Financial Times

Leaked correspondence shows Russian specialists helped Tehran troubleshoot a ramjet system that could let cruise missiles fly several times the speed of sound.

  • On Tuesday, a Financial Times investigation revealed a "multiyear covert programme, codenamed C430L," in which Russia is helping Iran develop supersonic cruise missiles with advanced ramjet propulsion technology.
  • Iran has pursued ramjet technology since at least 2019, when Supreme Leader Ali Khamenei inspected development sites; analysts describe the current cooperation as part of a broader exchange involving Iranian drones for Russia's war in Ukraine.
  • Russian specialists from the NPO Mashinostroyenia design bureau enlisted in the program are refining designs for missiles intended to threaten United States Navy aircraft carriers and other warships throughout the Middle East.
  • Despite ongoing conflict between Iran, the United States, and Israel, Russian support continued into 2026, requiring approval from the highest political echelons in Moscow.
  • Russia is attempting to "broaden the Ukraine war and draw the US into different theatres," said Nicole Grajewski, a professor at Sciences Po in Paris, enabling Tehran to master technology it has sought for decades.
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The C430L programme is intended to enable Tehran, at war with the United States, to develop a stator-powered propulsion system, an engine that allows a cruise missile to fly several times the speed of the sound by following a course at the bottom of the water.

·Paris, France
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According to a report, the Kremlin is helping the Ayatollah regime develop hypersonic weapons. Experts are alarmed. The secret project could become a threat to the US Navy in the Middle East.

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Jornal Expresso broke the news in Paço de Arcos, Portugal on Tuesday, September 1, 2026.
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