J-20 5th Gen Fighter Thread VI
- Thread starter siegecrossbow
- Start date
- Status
by78
General
Fingers crossed I haven't got a lot of luck with photo's recently. Active J-20 unit.
Already posted.
Another photo of #78272:
Note that the Flaperons are deflected downward to create lift, and the canards are deflected upward on the leading edge also creating lift and "pitching" the nose UP,, so he's low and slow,, possibly turning off downwind onto base leg, or off base leg onto final... as Dr Song insisted, this is a VERY COMPLEX FCS, and writing this program, and all of its rules, which of necessity will change as power and airspeed change is mind boggling..
We haven't seen a lot of airwork in recent days, but the two ship fly-by at Zuhai last fall showed a very nicely proportional control input and very nicely coordinated maneuvering,, it looked very smooth and natural to me, and believe me when I tell you that any lack of coordination will be obvious and awkward looking...
Quickie
Colonel
That the FCS is very complex is supported by the fact that, if I'm not mistaken, you still can't get a RC J-20 model in the market.
Without the FCS the RC J-20 model is probably too difficult to fly and the RC model manufacturer simply don't have the expertise to build in a FCS for the model.
The only way is to heavily modify the J-20 model. Otherwise, without the FCS, it will be quite an effort to control the J-20 model, as can be seen in this video.
Last edited:
Another photo of #78272:
I would also note that the ruddervators are each deflected inward on the leading edge,, which should lift the aft end and pitch the nose down,, so plenty of lift is obviously being created by the downward flap deflection coupled with the canard making "lift" to pitch the nose up...
It is normal on approach to have to add a little downward deflection in order to keep airspeed from deteriorating, the application of flaps will cause a slight "ballooning" effect on the whole aircraft, resulting in energy loss, and this must be compensated with the very judicial use of some downward pitch.. once you have "stabilized" the approach bringing the throttles back up slightly off idle will also help stabilize the approach.
too much and you get an overspeed, to little and your energy and airspeed begin to deteriorate rapidly,,,, airspeed control on approach is absolutely critical,,, speed brakes do help,, but nothing compensates for lack of good planning, and "letdown" often begins 50 or more nautical miles away from the destination airport.. you want to maximize efficiency in most cases.
Modern fighter aircraft are equipped with an angle of attack indicator,,, which is honestly more accurate than the airspeed indicator,,, but either one will do,, you want to arrive at the threshold and begin your "flare" with just enough energy to allow the aircraft to slow its rate of decent substantially, but not so much airspeed that you "float" down the runway.
by78
General
A very old photo, a much higher quality version of it had already been posted (minus the Chinese characters). If you see a photo of J-20 in splinter camouflage, then it's almost certainly an old photo and shared before.
- Status