俄2016年底售华4架苏-35战机

choi

刘新宇, 俄2016年底售华4架苏-35战机. RFA, Sept 15, 2016.
http://www.rfa.org/mandarin/yata ... 09152016100913.html

the last four paragraphs:

"俄罗斯试飞员亚历山大·普连科对此表示说：'苏35的超机动性使其有了躲避来袭导弹的绝招，遇到导弹袭击的时候，通过一个简单的后空翻机动动作，就可避让导弹，而扭矩动力不足的导弹不可能突然小半径急拐弯，不怕导弹的战机非常可怕。'

"另有军事网站披露，虽然俄方在售华苏35问题上百般刁难甚至是戏耍中方，但北京一直对苏35不离不弃，是因为苏35拥有的一些技术，中方可能再花20年也追不上，这还不是外界普遍关注的苏35先进矢量发动机技术，而是高寿命的结构强化材料。

"被中方歼10大量仿制的俄罗斯苏27，实际上有严重的结构缺陷，在跨、超声速阶段甚至可能解体，卖给中国后，俄方在苏35进行了三翼面布局改型，并使用了第三代高寿命的结构强化材料。

"在多次听到 '狼来了' 之后，外界对俄方此次再次宣布2016年底对华提供4架苏35战机的消息均表示 '谨慎乐观。'

Note:
(a) "苏35的超机动性使其有了躲避来袭导弹的绝招，遇到导弹袭击的时候，通过一个简单的后空翻机动动作，就可避让导弹，而扭矩动力不足的导弹不可能突然小半径急拐弯，不怕导弹的战机非常可怕。 * * * 苏35先进矢量发动机技术"
(i) 矢量发动机  Thrust vector control engine (TVC Engine)
(ii) Jim Matthews, How Things Work: Thrust Vectoring; In a tight spot, you need zoom to maneuver. Air & Space Magazine (Smithsonian), July
http://www.airspacemag.com/fligh ... vectoring-45338677/

the first three paragraphs:

"Remember the scene in the movie Top Gun when Navy pilot Pete “Maverick” Mitchell gets the upper hand on his instructors by slowing down, pulling up the nose of his F-14 Tomcat, and watching his opponent fly right by? The idea was to get a quick, unexpected position behind the bad guy, putting Maverick (played by Tom Cruise) and his trusty sidekick Goose into place to win the Engagement.

"Real fighter pilots will tell you that what Maverick does is a showoff move that bleeds off so much energy that you’re vulnerable to getting shot down yourself. What a pilot really needs is a way to quickly get in the right position to fire at the enemy. Today’s most maneuverable fighters use thrust vectoring, which can make a jet turn faster and more tightly.

"Powered by Pratt & Whitney F119 turbofans, each with 35,000 pounds of thrust, the F-22A—the Air Force's newest fighter—sports a nozzle that can direct exhaust thrust up or down as much as 24 degrees.

"The advantage to pilots is superior low-speed and high angle-of-attack maneuverability, compared to conventional-thrust aircraft, says Second Lieutenant Aaron Hoke, a propulsion engineer on the U.S. Air Force team that manages the Lockheed Martin F-22A Raptor program at Wright-Patterson Air Force Base in Ohio.

(A) angle of attack
https://en.wikipedia.org/wiki/Angle_of_attack
is the angle between incoming wind and airplane direction.
(B) There is no need to read the rest of text.
(iii) Engines: Thrust Vector. In Gary Wollenhaupt, How F/ARaptors Work. How Stuff Works, undated.
http://science.howstuffworks.com/f-22-raptor5.htm
(iv) in real life:

Tonkatsu298, F-22 Thrust Vectoring Nozzles. YouTube.com, May 7, 2009.
https://www.youtube.com/watch?v=cTCGJAoAz_8

The "tonkatsu" is Japanese for deep-fried pork chop. (ton = 豚)

(b) "俄方在苏35进行了三翼面布局改型"
(i) Sukhoi Su-27
https://en.wikipedia.org/wiki/Sukhoi_Su-27
("The swept wing blends into the fuselage at the leading edge extensions and is essentially a cropped delta (the delta wing with tips cropped for missile rails or ECM [electronic countermeasure] pods). The Su-27 is also an example of a tailed delta wing configuration, retaining conventional horizontal tailplanes, though it is not a true delta")

* delta wing
https://en.wikipedia.org/wiki/Delta_wing
(ii) I google ("S-27" "Su-35" wing design or wing or delta wing) and find nothing to distinguish the wings of the two aircraft. Use images.google.com for (each fighter and wing), they are similar when one looks down the fighter from aboce.
(iii) For fun (even though the RFA report does not mention it), here is the wing design of F/A-22 (A for "attack").

Lockheed Martin F-22 Raptor
https://en.wikipedia.org/wiki/Lockheed_Martin_F-22_Raptor
(The Raptor has clipped delta wings with a reverse sweep on the rear)

Go to Wiki (mentioned above in (b)(i)) for "swept wing" ("either backward or, occasionally, forward").