I spent the last 2 hours searching for ideal shots for comparison, I couldn’t find ideal center line tail shot or a perfect top shot :confused: 🙁

It seems you were not shocked by my exaggeration? :diablo:

Actually the nozzle on PAKFA is exquisite much more than your flap TVC.

The nozzle to be stealth or not does not depend on sth you didn’t expressed, and I didn’t any advantage of single piece canopy

Even this single engine MRFB is between 20.42 to 21.21 meters, the difference come from prob for sure

Well, near post stall speed then.
Look at 02:18 in the vid..

http://www.youtube.com/watch?v=16YbQsvseEc

ogami musashi@

The Carnards and stabz are moving crazy, due to the very low speed. Quite impressive.
But if you look at the whole vid through, the Carnards are pretty much fixed during the flight envelope.
So it matters little if the Carnards create drag at such low speed.

It might be called post-stall maneuver, my misinterpretation.

Unfortunately I do not have photoshop. I basically used MS paint and enlarged the picture to look at pixel location to find the lengths. Admittedly it’s an imprecise process, but one where that imprecision gets mitigated with higher resolution photos.

EDIT: I realized I committed an error with my initial estimates. I didn’t use the hinge on the stinger as the starting point, adding 5 additional pixels to the Su-27’s length. That makes my revised estimates using this method to be 20.9 meters.

OMG, I was played.:(

When we’re talking about a half a meter of difference, slight variations in pixel choice will matter for lower resolution pictures,

I’m not going to presume weight on this one though. I know that it looks more volumous, but I’ve learned to only trust cross sectional analysis in determining volume (for example, an object that looks thinner but is wider could have equal or greater volume), and even that might not have a bearing on weight. An example is the Su-35 and Su-27. While sharing mostly the same dimensions, the Su-35 is 2000 kg heavier. The internal structure and materials used could make the J-20 both lighter or heavier than how it looks.

Maybe it IS too early to say empty weight for 2001, may I know what tool did you use for measuring the photo I uploaded?and how did you measure?Did reference line was set by you or just roughly enlarged to see where it goes?

EDIT: If we use the stabs behind the wings as the endpoint of the J-20 instead of the tip of the vertical tail, then the length of the plane is 1050 pixels (since the stabs end at 1150 pixels).

1050/1130*.9292=20.35 meters

A decade ago, I made this mistake either, do you know the height of F7U-1 cutlass is from ground to vertical fin tip or the canopy?

I believe we have wasted a lots of time, because I believe all I done here has already done by Tongxu, His side view drawing is so perfect that with scale is roughly 21.08-21.12 meters.