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25 May 2023
by Jeremy Binnie
A Khorramshahr-4 is test-launched on an unspecified date. (Iranian Defence Ministry/Handout/Anadolu Agency via Getty Images)
The Iranian military unveiled what was presented as a new, more accurate variant of the Khorramshahr, its most powerful ballistic missile, on 25 May.
Called the Khorramshahr-4 (Kheibar), the missile was displayed at an event attended by Defence Minister Amir Mohammad Reza Ashtiani and shown being launched from the missile testing facility in Semnan Province in a video and images.
The Iranian media reported that the new variant has a more advanced engine that uses hypergolic fuel, giving it a range of 2,000 km with a 1,500 kg warhead. Unlike other types of fuel/oxidiser combinations, the new propellant can be kept in tanks for years, shortening the preparation time for a launch to 12 minutes, making it a tactical weapon, it was claimed.
The new propellant also requires smaller tanks, reducing the Khorramshahr’s motor section to about 13 m with the warhead adding about 4 m to the missile’s length, it was reported. The airframe is also made of a stronger composite material.
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