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Author Topic: Chengdu J-20 news, pictures, analysis Part III  (Read 51645 times)

Offline LowObservable

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Re: Chengdu J-20 news, pictures, analysis Part III
« Reply #120 on: November 07, 2017, 03:38:53 am »
Flow visualization!

Is the aircraft in the upper two images actually inverted?

Offline latenlazy

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Re: Chengdu J-20 news, pictures, analysis Part III
« Reply #121 on: November 07, 2017, 04:07:11 pm »
Flow visualization!

Is the aircraft in the upper two images actually inverted?
Nope, completely different angles. The top one is from last year’s Zhuhai Airshow. The bottom one is presumed to be from testing. We have a few other photos that give us some sense of the plane’s  vortical flow patterns.

Online Deino

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Re: Chengdu J-20 news, pictures, analysis Part III
« Reply #122 on: November 09, 2017, 11:47:33 pm »
Better now ?? (via SDF)

He was my North, my South, my East and West,
My working week and my Sunday rest,
My noon, my midnight, my talk, my song;
I thought that love would last forever; I was wrong.
...
For nothing now can ever come to any good.
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Offline DWG

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Re: Chengdu J-20 news, pictures, analysis Part III
« Reply #123 on: November 10, 2017, 04:53:48 am »




A couple of thoughts.

1) I think the centre J-20 is at a very slight angle to the runway centreline.

2) The varying distortion can be seen if you look at the open canopies. Slight on the rear J-20 pair, marked on the right-rear J-16.

3) The difference in distortion on the rear J-20 canopies (n.b. not the mirroring, the fact the mirroring isn't identical), despite both aircraft being aligned on equivalent runway block joints, seems to indicate the camera aimpoint was slightly off the centreline.
« Last Edit: November 10, 2017, 04:57:41 am by DWG »

Offline Trident

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Re: Chengdu J-20 news, pictures, analysis Part III
« Reply #124 on: November 10, 2017, 09:10:58 am »

Offline PaulMM (Overscan)

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Re: Chengdu J-20 news, pictures, analysis Part III
« Reply #125 on: November 10, 2017, 09:54:37 am »
Regardless of method, it won't be that precise with photo analysis. 12.9m span, 20.9m length is the estimate.
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Offline Blitzo

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Re: Chengdu J-20 news, pictures, analysis Part III
« Reply #126 on: November 10, 2017, 02:56:09 pm »
Better now ?? (via SDF)

Selecting the right photo is good  :)

For future reference and anyone else who is not aware:
« Last Edit: November 20, 2017, 06:02:54 am by flateric »

Offline TomcatViP

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Re: Chengdu J-20 news, pictures, analysis Part III
« Reply #127 on: November 10, 2017, 03:15:32 pm »
Humm.... Sat alt should turn metric perspective flat... Deino, sorry but this view is... a fake  :-\

Offline Blitzo

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Re: Chengdu J-20 news, pictures, analysis Part III
« Reply #128 on: November 10, 2017, 03:21:44 pm »
Humm.... Sat alt should turn metric perspective flat... Deino, sorry but this view is... a fake  :-\

The photo was taken from a drone, not a satellite  ;D

c'mon, not that hard to figure out...

Offline sferrin

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Re: Chengdu J-20 news, pictures, analysis Part III
« Reply #129 on: November 10, 2017, 07:53:27 pm »
Humm.... Sat alt should turn metric perspective flat... Deino, sorry but this view is... a fake  :-\

That's not from a satellite.  Probably from a quad-rotor "drone".
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Offline LowObservable

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Re: Chengdu J-20 news, pictures, analysis Part III
« Reply #130 on: November 11, 2017, 11:47:27 am »
Pretty obvious from the start, hence the argy about measurements from lower-rez satellite photos. Not only is this from a wide-angle lens, but to add to the fun it looks as if it might be a non-symmetrical crop.

Offline latenlazy

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Re: Chengdu J-20 news, pictures, analysis Part III
« Reply #131 on: November 11, 2017, 01:28:14 pm »
Pretty obvious from the start, hence the argy about measurements from lower-rez satellite photos. Not only is this from a wide-angle lens, but to add to the fun it looks as if it might be a non-symmetrical crop.

There are *lots* of problems with using this picture to get measurements, but until we have something better this the best we can do.

Offline TomcatViP

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Re: Chengdu J-20 news, pictures, analysis Part III
« Reply #132 on: November 11, 2017, 02:39:26 pm »
Pretty obvious from the start, hence the argy about measurements from lower-rez satellite photos. Not only is this from a wide-angle lens, but to add to the fun it looks as if it might be a non-symmetrical crop.

Could be an after effect.
« Last Edit: November 11, 2017, 02:57:47 pm by TomcatViP »

Offline sferrin

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Re: Chengdu J-20 news, pictures, analysis Part III
« Reply #133 on: November 19, 2017, 03:13:45 pm »


« Last Edit: November 21, 2017, 05:00:46 pm by sferrin »
"DARPA Hard"  It ain't what it use to be.

Offline sferrin

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Re: Chengdu J-20 news, pictures, analysis Part III
« Reply #134 on: December 11, 2017, 05:11:40 pm »
Awesome.
"DARPA Hard"  It ain't what it use to be.