hataf
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i have a question. Why the Chinese and PAF went for the Russian engine when one another local chinese option was available. Im talking about the WS9 engine used on the JH7.
Xian WS9 (a license-built Spey Mk202) afterburning turbofans
Dry thrust: 54.29 kN (12,250 lbf) each
Thrust with afterburner: 91.26 kN (20,515 lbf) each .
As i see it it has more thrust than RD93. So why not WS9 ??
The Rolls-Royce RB.168 Spey is a low-bypass turbofan engine originally designed and manufactured by Rolls-Royce that has been in widespread service for over 40 years. Intended for the civilian jet airliner market when it was being designed in the late 1950s, the Spey concept was also used in various military engines, and later as a turboshaft engine for ships known as the Marine Spey, and even as the basis for a new civilian line, the Rolls-Royce Tay. A licensed version built by the Chinese is known as the WS-9 Qin Ling. Aviation versions of the "base model" have accumulated over 50 million hours of flight time. In keeping with Rolls-Royce naming policies, the engine is named after the River Spey.
and picture
General characteristics
Type: Low bypass turbofan
Length: 204.9 in (5204.4 mm)
Diameter: 43.0 in (1092.2 mm)
Dry weight: 4,093 lb (1856 kg)
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read in highlighted i think thats why