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.
--
are, shall we say, unusual in both ferocity and predictability. This
is beyond narcissism. I used to think Trump was an 11-year-old, an
undeveloped schoolyard bully. I was off by about 10 years. His needs
are more primitive, an infantile hunger for approval and praise, a
craving that can never be satisfied. He lives in a cocoon of solipsism
where the world outside himself has value - indeed exists - only
insofar as it sustains and inflates him."
- Charles Krauthammer M.D. (Board Certified Psychiatrist)
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