On Sun, 05 Aug 2018 11:45:55 -0700, Stormin' Norman
<norman@schwarzkopf.in.memorium> wrote:
>On 5 Aug 2018 10:25:52 -0700, Miloch <Miloch_member@newsguy.com>
>wrote:
>
>>In article <ff8emd98n9lk0vts7dmpin01nr965b86h7@4ax.com>, Stormin' Norman says...
>>>
>>>On 5 Aug 2018 07:31:15 -0700, Miloch <Miloch_member@newsguy.com>
>>>wrote:
>>>
>>>Interesting they did not incorporate winglets. Also interesting that
>>>the PLAA is requesting ~1000 Y-20 aircraft. That is a hell of a lot
>>>of airlift capability.
>>>
>>>
>>
>>The most interesting part was from the original article:
>>
>>"Propulsion...
>>
>>The Y-20 is powered by four 12-ton thrust Soloviev D-30KP-2 engines, and all
>>early production units are likely to be similarly powered. The Chinese intend to
>>replace the D-30 with the 14-ton thrust WS-20, which is required for the Y-20 to
>>achieve its maximum cargo capacity of 66 tons. The Shenyang WS-20 is derived
>>from the core of the Shenyang WS-10A, an indigenous Chinese turbofan engine for
>>fighter aircraft.
>>
>>In 2013, Shenyang Engine Design and Research Institute was reportedly developing
>>the SF-A, a 28700-pound thrust engine, for the Y-20 and the Comac C919. The SF-A
>>is derived from the core of the WS-15. Compared to the WS-20, the SF-A is a
>>conservative design that does not seek to match the technology of more modern
>>engines.
>>
>>In late 2017, it is revealed that domestic Chinese turbofan WS-18 has begun
>>flight test on Y-20. Compared with Russian Soloviev D-30, WS-18 is 300 kg
>>lighter, weighing at 2000 kg; with thrust increased from 12.5 ton of D-30 to
>>13.2 ton; and fuel consumption of WS-18 is also reduced in comparison to D-30,
>>and the mean time between overhaul of WS-18 is 3000 hours. However, because the
>>increase in thrust is not significant in comparison to D-30, WS-18 is like to be
>>a stopgap measure before WS-20 is ready.
>>
>>-----
>>
>>For all their advancements in aviation, they still lag behind in engine tech and
>>are using Russian turbofans.
>>
>
>Considering where they were 75 years ago, they are making tremendous
>strides and I would never underestimate them.
No small part due to China's prolific military and industrial
espionage programs.
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