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benhongh

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March 4, 2011 at 9:51 am in reply to: The PAK-FA Saga Episode XVI #2329514

benhongh
Participant

She flies!! I’m still waiting for high res images? Can anyone upload some of them?

February 21, 2011 at 9:35 am in reply to: J-20 Black Eagle – Part 4 #2339025

benhongh
Participant

the electricity output of 2 31FNs mounted on J-20 can afford what kind avionics?

60 KW can hardly feed a powerful AESA with 2000 T/R modules.

Maybe, this is better start to analyze.

You don’t test fly a prototype with a radar on it, and you’ll be crazy to power a fifth gen airframe with a fourth gen engine.

The logical conclusion is by the time (8-10 years from now) they have an AESA, they’ll have the engine to power it.

February 4, 2011 at 5:13 am in reply to: J-20 Black Eagle – Part 4 #2351510

benhongh
Participant

emile,

Small suggestion. Why not use the ejection seat as point of reference. Or Ejection seat + canopy + etc..

Don’t think the seat vary in size too much even if they are different versions. If the seat is the same used on the J-10, then that could be a good point of ref. The incline of the seat can change, but you should be able to compensate for that.

The problem is we only see part of the seat that sticks above the cockpit. The smaller the reference the more error we get at estimation. Ideally there should be maintenance personnel pushing missiles around but sadly this ain’t the case.

Another way to estimate the length of J-20 would be to examine some frames from its first flight video, which featured both J-10 and J-20 from roughly the same distance from the viewer (from the end of runway).

February 4, 2011 at 1:09 am in reply to: The PAK-FA Saga Episode XV #2351530

benhongh
Participant

Sweet :p

http://www.airliners.net/photo/Russia—Air/Sukhoi-T-50/1860366/L/&sid=9991643a9408fee45b0d8f2307a26055

I’m wondering when that picture was taken.:confused:

That is one beeeautiful, beeeautiful bird!!!

January 31, 2011 at 10:37 pm in reply to: PLAAF Thread 15 #2352667

benhongh
Participant

As J-20 implied, instead of simply saying “Fake” perhaps you could explain how you have reached that conclusion.

Clearly investing into two very similar designs for very similar role(s) is a waste of resources.

January 31, 2011 at 12:00 am in reply to: PLAAF Thread 15 #2353111

benhongh
Participant

larger Z-19 pics

Fake

January 27, 2011 at 12:34 am in reply to: J-20 Black Eagle – Part 4 #2355195

benhongh
Participant

You have to use what is at hand in numbers and from 2015 the F-35 will be the practical US state of art about that.

No it is not. The black projects completed sealed off from the public ARE the state of the art tech. F-22 and F-35 are second rated technologies that are mature enough for military procurement.

January 26, 2011 at 11:12 pm in reply to: J-20 Black Eagle – Part 4 #2355237

benhongh
Participant

That is the point. The people of CAC are working for the J-20 and be payed by Chinese tax-payers money. That in mind the Chinese taxpayer has the right to be informed about that program firsthand. The ones responsible are the ones which trigger the guesses world-wide. Who is to blame really?! 😉
Our website is limited to such guesses and none is to blame about that at first. We agree in general that most are far fetched and not helpful for the real case. The USA are blamed for missing details, the Russians restrict themselves to general claims, when even that is missing from the Chinese officials. 😡

You might want to put things into perspective, Sens. The J-20 represents the tippy top of the Chinese aeronautical industry. The F-22 and F-35 are nowhere near the best the US is developing. When was the last time you were informed about what’s flying over the Groom Lake, huh?

January 26, 2011 at 7:26 am in reply to: Hot Dog PLAAF; News and Photos volume 14 #2355722

benhongh
Participant

Briefing: China set to bid on major US aerospace programmes

LOL! AS IF the US is gonna buy a plane from China.

January 26, 2011 at 7:07 am in reply to: J-20 Black Eagle – Part 4 #2355725

benhongh
Participant

guys, i found some interesting stuff:
a new stealth jet concept design, submitted by Hongdu Aviation Industry (Group) Corporation, China

With all due respect, this just doesn’t look like anything serious.

January 25, 2011 at 6:03 am in reply to: J-20 Black Eagle – Part 4 #2356414

benhongh
Participant

Wrong. Stealth shaping goes back to the 1940s using optical physics ray-trace techniques.

However, the ability to predict RCS using computer modeling in the 1970s relies upon Pyotr Ufimstev’s theories.

Sorry but when I say stealth shaping, I really just mean F-117, B-2, F-22, F-35, etc

January 24, 2011 at 10:16 pm in reply to: J-20 Black Eagle – Part 4 #2356527

benhongh
Participant

F-117: 70-80s tech materials and manufacturing based on russian radar evading theories. With enormous costs and after the Kosovo incident, the aircraft was proven innefective, and with new radars, the stealth tech, useless. With all this factors the craft was considered obsolete, and this in combination with the enormous costs, led to his retirement in 2008.

All stealth shaping is based on russain radar evading theories.

January 18, 2011 at 9:56 am in reply to: J-20 Black Eagle – Part 4 #2360675

benhongh
Participant

To benhongh:
Even with long-coupled canards, the wing recieved washing from canards still strongly, enough to promote lift. You can see it by a pic of wind-tunnel testing of EAP which uploaded many times in this forum.
The layout of VLT, the J-20 used is pretty unusual.

I was talking about what effect of UP WASH ahead of the leading edge of the wing has on the canard. The closer to the wing’s leading edge, the stronger the upwash and the larger the local AoA.

The EF’s canard is far away from the wing, has relatively small up wash, and has a large moment arm from the CG, so does not have to deflect much for pitch down moment.

January 18, 2011 at 8:10 am in reply to: J-20 Black Eagle – Part 4 #2360700

benhongh
Participant

so you see alot of canard trim deflections in EF’s lowspeed level flights?

Why should I? With the canard away from the wing the up wash ain’t particularly strong and the moment arm is pretty substantial.

January 17, 2011 at 5:19 am in reply to: J-20 Black Eagle – Part 4 #2361513

benhongh
Participant

no, not yet. I am still scouring literatures. I find brochures highly…

my gut still highly doubt that’s their normal configuration, may be what they claim is that their FCS may tolerate a -35% static margin due to fuel and external loads imbalance… total speculation on my part.

I wouldn’t be surprised for that static margin for EF though. It was born to be agile in the supersonic regime anyway.
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