passive radar?
russian plasma tech?
hey mig-29 you are becoming desperate for arguments.
why desperate? Cassidian is a real company part of EADS
see this is the real webpage
Cassidian, the defence and security division of EADS, has developed what is known as “passive radar
I think you do not understand what are they claiming
watch this video at minute 33
[video=youtube;lq-xlLcL_1k]http://www.youtube.com/watch?v=lq-xlLcL_1k[/video]
Petr Ufimtsev the Creator & Father of Stealth Technology who developed the math of EM wave radar deflection theory for stealth faceting, claims bistatic radars can be used to detect stealth aircraft. (watch minute 12 and later 33)
If stealth is detected then you need speed to survive, any fighter if detected will be in danger, specially since the new radar by cassidian is passive, the stealth aircraft does not know when it is detected.
If fired upon speed will be the last resort to survive.
On PAKFA the are planning to use the AESA radar sets on the wings to fry the active radars of missiles.
but speed will give F-22 an advantage if detected, it was proven by MiG-25 that speed allowed it to dodge attacks.
117, 117S are in production see
So for China if their engines are not going to be ready in 10 years time buy interim 117s is not a bad idea but Russia is only willing to sell it if they include the jets
but see Application
117S engine has been created by NPO Saturn (Luylka Design Bureau) for Su-35 multirole fighter developed by Sukhoi Company. Geometry and mounts of the 117S engine are similar to its predecessors, i.e. AL-31F and AL-31FP engines.
This gives an opportunity to use the 117S engine, with slightly retrofitted engine nacelle and equipment, for the re-engining of earlier built Sukhoi-27/30 fighters, operational by Russian and foreign Air Forces
Russia is willing to export it and even J-11s can be retrofited see Saturns says that but who knows if the chinese supercruising engine is ready they won`t need it but who knows only time will tell
By the way Plasma stealth research does exists and is an area of research.