Found this videoclip very interesting, during a take-off the J-10 leaves a white vapor trail comming from an orifice placed just behind the cockpit. My guess would be the aircraft air-conditioning system, probably vaporized water-alcohol mixture,am I right? Thanks

link to the whole video, check time 2:30 , screenshots are below

http://www.youtube.com/watch?v=quAzKJAWjok

I see your point and you make a fare assessment. so you are saying that the J-20 is in a more advance stage than the Pakfa..

More advanced stage of what? Making jagged edges of wheel bay doors? Taxiing? May be, flight testing?

Yes it depends what you define as advanced stage. If it is meeting stealth requirements then I think for example the intake design of the J-20 prototype has already shown the final version shielding the compressor blades not directly visible for radar waves when compared to russian PAK-FA. I also like the fact that Chinese were not afraid of the challenge and went for unconventional LO platform meaning canard delta wing configuration on principle superior compared to convetional tail design in supersonic enviroment. Next, it seems they`ve assembled two flightworthy prototypes hoping to speed up the flight testing process. If it is true, then again they are in advanced situation compared to Russians a year back. True, both J-20 prototypes are painted black matt so it is hard to judge skin details like surface alignment or quantity of serrated panels. It..well..maybe when unpainted the J-20 would look the same as the first prototype PAK-FA, a metal ingot with very less composite parts installed dedicated to test flight systems only with absolutely no requirement for low observable. With more detailed photos we will see, but what if again it turns to be not true and those Chinese prototypes are not meant for testing flight systems only?

Let`s just be fair and admit guys that Chinese proved that they certainly can do it at the same level as Russians maybe even better. It’s my two cent worth opinion that sometimes it happens that a student can carry on and take over just where the teacher leaves off.

more fence party
http://pic.yupoo.com/emfire/AKT846j6/116uml.jpg

all from FYJS

http://www.fyjs.cn/bbs/read.php?tid=302904&fpage=0&toread=&page=2

Says this site was banned due to malicious software and trojans, no new pics there. Anyway this picture link you posted before is strange as well, all I get is top of the cockpit canopy.

http://pic.yupoo.com/emfire/AKTa2H1W/141KLN.jpg

http://pic.yupoo.com/emfire/AKTe1WPW/k7EjX.jpg

Finally, where have you been last several hours? Do not say you were sleeping. bcs we`re all desperately waiting for new pictures….:)

No!

yes, there it appears to be straight, because the wing has a twisted down leading edge of the outboard wing section, see here….therefore from front angle a perspective trick…..

I don’t get it..
Why couldn’t they design the MLG doors to swing out from top not like we see here below and down?

Making the hinges above would make things more complicated for the door actuators, in this configuration when opening down even the weight of the doors is helping.
Typically most of landing gear doors on military jets open only during extension/retraction, and are closed while the gears are extended. I think when this bird is gonna take-off and land for the first time, those big doors will be closed. It would be unpleasant for the pilot also to fly the with doors open during landing and take-off. But do not kill me if I;m not right…:)

I think it’s more of a integrated maintenance door just for prototype

I thought the MLG is retracted forward and up, so the wheel has to end in the big door cavity.

In my opinion an increadably simple landing gear housing doors for a fifth gen. aircraft. Its getting clear how they created the bird in such a short time! Can be dangerous in an emergency situation or full load but sure they already knows it.

I was thinking what if these “big” landing gear doors can be closed separately during a real landing procedure? So far we have seen pictures from trials on the ground, no need to close them, but I agree that in a an emergency situation or hard landing incident they could be dangerous.
Well, the first flight of this spectacular looking bird will prove me wrong or right….:)