You are comparing an HMD or a HUD (or both) to six IIR cameras distributed around an F-35 arframe… And the Chinese are the ones who dont understand what they are doing?
Ok.

And before you answer to this post; do you have hard data on the J-31 sensors in order to make a direct comparison with their American counterparts? No? Then dont bother to answer.

Simple. J-31 is an attempt to COPY what the Americans have developed on the F-35. And as anyone knows a copy, a Xerox if you will, is never as strong as the original. Every significant feature on the J-31 is a feature first developed by the Americans.

Does anymore need to be said?

China is just trying to keep up and the world understands.

In my humble opinion the China have been very clever in putting these RD 33 engines in the J-31 prototypes , .

What choice did they have? Russian engines are the only ones available that can handle the task at hand.

The PAK-FA, the J-20, the J-31 and every Western evolved proposed version of a “teen” series or “Eurocanards” for the last decade feature an HMD and a HUD.

The F-35’s DAS offers situational awareness far beyond any HMD or HUD on any plane to date. This explains the Chinese attempts to copy it.

In fact the F-35 DAS has detected and tracked a two-stage rocket launch at a distance exceeding 800 miles during a routine flight test. This gives F-35 the capability to be part of the USN Fleet defense against ballistic missile threats like the so called “carrier killer’ DF-21D. No HUD or HMD begins to offer this type of capability

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Missile detection test link:

http://www.spacewar.com/reports/F35_DAS_Demonstrates_Ballistic_Missile_Defense_Capabilities_999.html

On the contrary, they know exactly what they are doing. If the HMS goes on the F-35 (not working properly as it is anyway…), good luck aiming with a chewing gum spot on the windscreen… if the HMS goes on FC-31, just use the HUD. Oh they know what they’re doing alright, don’t you worry about them.

With the F-35 HMDS pilot situational awareness is enhanced by the advanced head tracking in the cockpit. This function is best described by the F-35 program literature below:

” The F-35’s Helmet Mounted Display Systems provide pilots with unprecedented situational awareness. All the information pilots need to complete their missions – airspeed, heading, altitude, targeting information and warnings – is projected on the helmet’s visor, rather than on a traditional Heads-up Display. This approach greatly reduces the pilot’s workload and increases responsiveness. Additionally, the F-35’s Distributed Aperture System (DAS) streams real-time imagery from six infrared cameras mounted around the aircraft to the helmet, allowing pilots to “look through” the airframe. The helmet also provides pilots night vision through the use of an integrated camera..”

Note the reference to a ‘traditional Heads-up display’ and how the F-35 system far surpasses that. Further, with the DAS system which the Chinese have tried to replicate on the J-20 and the J-31, the need for a conventional HUD is no longer there. And your reference to the F-35 HMD not working is unsupported. Recently the CBS program “60 minutes” did an in depth report on the current state of the F-35. Considerable time was devoted to discussing the HMD and DAS system. You can rest easy as the human factors and pilot interface are working just fine. This is proven by noting that there is NO HUD on the F-35s!

Consider how the HMDS is intrgrated into the DAS system to where the pilot can have a 360 degree view of his immediate airspace, even to the point of looking below the aircraft by looking through the floor of the cockpit. No HUD system in existence can do that.

Finally chew on this bit of information: If the F-35 HMDS and DAS was so unreliable and not working as designed then why is China working overtime to copy the system? Looking at the Chinese so called “Advanced cockpit” mock up it can clearly be seen as a one-to-one copy of a F-35 layout. This is even down to the carbon fiber helmet on the pilot figure ! China is trying to convince the world that they can run with the big boys but they are still several generations behind

Maybe You misunderstood my point: it is neither the design itself nor the engine itself ! It is simply the combination of both – even if rated at around 81,3 kN or a bit more like some state, it is most likely (IMO !) not enough to fully exploit the airframes real capabilities.

So what are the air frame’s real capabilities? Can you expand on your observations?

If so 31001 is then the same as J-20 2001 and 2002 (technology demonstrators, though one cannot but be amazed that similar american leaps from TDs to series prototype took 7 years for F-22 and 6 for F-35, for China and J-20 it took just 3!

Vast amounts of purloined technology greatly shortened the time the development took.

For a moment I thought you were speaking about me