On Sun, 05 Aug 2018 11:45:55 -0700, Stormin' Norman
wrote:

On 5 Aug 2018 10:25:52 -0700, Miloch
wrote:

In article , Stormin' Norman says...

On 5 Aug 2018 07:31:15 -0700, Miloch
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.