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From: Miloch <Miloch_member@newsguy.com>
Newsgroups: alt.binaries.pictures.aviation
Subject: Re: Xi'an Y-20 Cargo Transport pics [6/7] - first operational Y-20 arrives on the tarmac. Chinese Internet.jpg (1/1)
Date: 5 Aug 2018 10:25:52 -0700
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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.
*
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