SOHEIL
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Analysis: Iranian cruise missile unveiling raises questions about range - IHS Jane's 360
Seems IHS Jane's master experts can't identify a low bypass turbofan engine :
To achieve this range in a domestically produced cruise missile Iran would need an engine with a similar performance to the R95-300 turbofan used in the original Kh-55. However, it is highly unlikely that Iran is capable of producing such an engine.
It is even harder to produce a small turbofan engine for a cruise missile than it a standard-sized engine due to the smaller components and higher pressures and temperatures involved. Indeed, there are only five known manufacturers that currently make small turbofans that could be used in cruise missiles: Williams International in the United States (F107 and F112); Pratt & Whitney Canada (PW600); AMNTK Soyuz (R95-300) and NPO Saturn (36MT) in Russia; and Motor Sich in Ukraine (MS400). It is unclear if China's turbofan-powered cruise missiles use domestically produced engines or ones imported from Russia or Ukraine.
An alternative explanation is that the Iranians dispensed with the turbofan used on the original Kh-55 and fitted the Soumar with a far simpler and cheaper turbojet engine.
Seems IHS Jane's master experts can't identify a low bypass turbofan engine :