The main wheel retracted vertically not horizontally.
The place where is set as internal fuel tank in drawing behind the cockpit, usually put in avionics.
I recognized the pic was drawn nicely, but computer software also destroyed many talents.

With front gear match, main wheel match, engine nacelle match and height of cockpit match according to the comparison of which man aside Su-27’s cockpit we usually seen and which man aside J-20 presented.

What if the guy was 1.50m?

You cannot choose only the tallest possible size the guy could be and ignore the possibility that he might has been on the small side.

Well that just a classic case of circular reasoning.

Why have you set the flanker’s rear wheel as the lowest possible size the J20’s could be? Because you have already decided that the J20 is bigger than the flanker.

All you are doing is shaping the available information for fit this pre-conception you already have formed.

Improbable but far from impossible.

All you are doing if making assumptions that has no basis other than your already pre-formed idea that the J20 is bigger than the flanker.

As anyone who even knows the most basic things about scientific research will tell you, nothing can be taken for granted, and as soon as you start making baseless assumptions, the credibility of you work goes down.

I have no idea what you are saying here I’m afraid.

:diablo::dev2::cool:
all of them are dwarives?
notice I was not talking about that man who carried bag aside the wheel.

Dear Over_G:

Many thanks for a chance you given me to reexam the size of PAKFA and Su-27.
I checked many aspects including main wheel, front gear, nozzle, engine nacelle, length of missle even the helmet you emphasised before I insisted a data.
It is a tough work to give consideration to each aspects an exactly same accuracy.
The sift has to be effected by amounts of influences such as infringence by light, buffeting by camera, deviation by position and so on……
So I have to merely give an average level to every elements.
What I had given to was two extrems, so that you saw the PAKFA is very close to Su-27 on one side and far away from Su-27 on the other side to both.
Now here is the one in which three aspects: main wheel, engine dimension, helmet in canopy matched simultaneously leading to a quite reasonable size remained.
The source file also is contributed for your retest
please click me to download the PS file

If you just look at the size of the noses of the two, I don’t think that of J-20’s will be much wider than SU-27’s, the everage height of Chinese pilot can’t 2.5-3m right?

Did you notice the man is closer to the camera?:rolleyes:

These two reply is rebutting yourself. Rethink it, you are not stupid.

also inlet cross section area can’t be that much different between the two as it’s related to engine airflow right?

I see what do you mean, but no difference being there.;)

so wheel size has a direct relationship to aircraft size?:rolleyes:

No, we built more reference system.
You can estimate height of standard human body’s caudal vertebra
I presumed that man who stood aside the main wheel is about 1.75 meters tall
You can see that diameter of J-20’s main wheel almost reach a man’s loin.
So the result was guided to only way which could taught us to assume the diameter of J-20’s main wheel same as Su-27’s is an excessively conservative measurement.
Further more, you guys should know since the volum of J-20 is distinctly bigger than Su-27/35, if its diameter of main wheel is not enlarged, the intensity pressure the tire got would be too high.
I’d rather insist the 15 meter for wing span, or say more approaching to 15 meters

I’m making a 1:20 model of J-20 at the moment, which involves all sorts of estimations of dimension via current photos, my estimation is: Length 21m x Width 13-14m
which indeed is smaller than Flanker

My primary data told one who works for 611 was 22 meters long 14 meters wide on QQ.
The J-20 is significantly larger than Su-27, please notice its wing area and volum of fuselage.

Considered the dehedral of J-20’s wing, and little higher banking angle, its wing span is more closer to 14 meters rather than 13 meters.
This photo joint by me but sincerely grateful to 秋天的雨 who gave me the direction to understand the concept of layer in photoshop.

I presume you mean Lavochkin (La)-250 ‘Anakonda’ ????

Ken

Apology for the Hmmmm I don’t know how to say it in English

lapsus calami

:p