Col Beausabre: The Titan was developed in the 1960s, and abandoned decades ago when we signed a treaty with the Russians in I think the late seventies. In general, missiles worldwide today use solid rocket technology, though of course there are exceptions (as I noted).

I am also certain that Iran could get help to do this from China. In fact, in Iran’s successful orbital in April 2020 solid rocket technology was almost certainly used, as the orbital rocket used a mobile launcher.

Though everything in Iran is, like China, linked to its military ambitions, for engineering reasons the goals of the Simorgh program appear aimed at actually technology for launching satellites, not ICBM bombs. The two are different.

Such technology of course will be used to launch surveillance satellites, and as I noted the know-how gained from building it can aid missile development.

I have to disagree

See the US Titan

“Titan was a family of United States expendable rockets used between 1959 and 2005. The Titan I and Titan II were part of the US Air Force’s intercontinental ballistic missile (ICBM) fleet until 1987. ”

“The Martin Company was able to improve the design with the Titan II. The RP-1/LOX combination was replaced by a room-temperature fuel whose oxidizer did not require cryogenic storage. The same first-stage rocket engine was used with some modifications. The diameter of the second stage was increased to match the first stage. The Titan II’s hypergolic fuel and oxidizer ignited on contact, but they were highly toxic and corrosive liquids. The fuel was Aerozine 50, a 50/50 mix of hydrazine and UDMH, and the oxidizer was NTO.”

Almost all Soviet/Russian ICBM’s used hypergolics (“stored liquid fuels”) because they lagged in solid fuel development

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