J-20 5th Gen Fighter Thread IV (Closed to posting)

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Air Force Brat

Air Force Brat

Brigadier
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no_name said:
According to someone on cjdby they've recently resolved some vibration issues with the V tails and now the J-20 is pretty much finalized in outer form.
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that makes a great deal of sense, the F-18, F-35, and if my memory is correct, even the F-22 had some issues with buffeting, at high AOAs. Note the ruddervators are also a primary pitch control, and they are subject to a great deal of force as they physically push the aft end of the aircraft down and the nose up... even the Cessna 172 that I learned to fly had a great deal of airframe buffeting proceeding the stall break, particularly the horizontal stab and elevator. So that does make sense.

and no, I did not forget the canard are also a primary pitch control, and as I recall the F-18 had strakes added behind the engine inlets on each side of the upper fuselage, this solved the vortex bursting, which was causing the buffeting, and the F-22 had its verts moved aft on the fuselage, so "tweaking" is the name of the game, even with computer design and manufacturing....
 
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D

delft

Brigadier
Air Force Brat said:
... even the Cessna 172 that I learned to fly had a great deal of airframe buffeting proceeding the stall break, particularly the horizontal stab and elevator..
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That buffeting is part of the design. You pay a price in a slightly higher drag. If your aircraft does provide that "service" you have to fit a stick shaker to warn the pilot he/she is approaching stall.
 
战

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Just Hatched
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SteelBird said:
J-20 Model from Zhuhai Airshow, 2000RMB, anybody want it?

9Siwh.jpg
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这玩意要是不能飞你亏大了，和美元也得300多吧。
 
战

战的痛快

Just Hatched
Registered Member
Munir said:
The fact is that who controls the sea lanes in the Indian Ocean controls the oil routes and international transport highway for everything else. With J20 Pakistan (*China*) controls the most important area in the world. Surely the USA will try to control UAE/ KSA/ Qatar but in the end the double hull tankers will go through the area that China will control sooner or later with J20. Many posters keep using the Indian deep strike option for J20. I think that is ridiculous. The Indian Airforce is just numbers. Just like their Navy it is in deep troubles in every aspect. Pakistan and India share 2000 km direct border. The most important parts of both nations can be reached without a deep strike option. In a stupid way one can even explode a tactical nuke above the Himalaya and the rest of the Indians will have no clean water. India is no longer a threat but more seen as annoying arrogant but failed superpower. Even the USA is moving away slowly. They have seen how unreliable this nation is. One way they want to get cookies from the nuclear deal but the other way they have warpact with Iran. And yes, even jet engines that are not allowed to be sold to Iran are flowing through an Indian broker from India to Iran... Sooner or later that will hit the papers.
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哥哥哎，我们自己好多人都没那个打算，中国向来为地区和平的坚定支持者，控制某一地区不让别人活不是中国传统，大家有钱一起挣才是世界往后的发展道路的大方向，美国人民也应该迎接这种准备。
 
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