Maybe if there is some bomber version based on j20. But somehow i think next chinese striker wont be based on an existing design.

there various kinds of concrete. the graphic itself says 60 m penetration is for 5000 psi concrete. That’s your standard reinforced concrete. Various high stress componends on bridges like girders are often made out of 10.000 psi concrete. The graphics says pentration through such concrete drops to just 8 meters. Of course, that sort of concrete is several times more expensive as it needs not only added materials but specialized mixing, requiring more time and manpower. That being said, i suspect it is still cheaper than making, transporting and assembling a shield made of steel of equivalent in protection.

There are mixes that offer over 10.000 psi resistance and, you would have guessed it right, are used for bunkers. There have been news some years ago that Iranians were developing concrete mixes few times stronger than the 10.000 psi mix.

Don’t all su-27 have the irst in the middle? literally most of flankers ever produced?

we don’t have much details. So start of development may be refering to start of engineering phase on the defined project for the prototype. if so, 2024 is quite realistic for serial production. since they’re talking about the project and its projected goals year and a half or two years earlier than 2016 – it sounds as if they’re already doing the preliminary computer concept design phase.

Full development of c17 was greenlighted in december 1985. There were alredy 5 prototypes flying by end of 1992. One could say that further airframes in 1993 and later were already serial production. Using the same timeframe and same production rate as c17, russian airlifter beginning full development say in mid 2016 would have nearly 10 prototype and preproduction airframes by end of 2023. and could be starting serial (mass) production in 2024.

also, paralay, that drawing of 31001 shows missiles with clipped fins inside the plane. no such missiles are known. both the fc31 models and the actual missiles in j20 have fins that do not fold. furthermore, 310001 shows basically an amraam sized missile. pl12 and future pl15 use the same body – one which is 2 cm wider than amraam and some 30ish cm longer.

USAF had a very clear intent with F-35, it had to carry 2×2000 lbs bombs internally for hardened targets,
it was the overriding priority.
whats the intent with J-31 ?

F-35 was a government ordered plane, with Army’s requirements. FC-31 is a private venture with the manufacturer deciding what the requirements should be.

We should really wait to get past this demonstrator stage and see at least the prototype of the actual combat variant – there may be some differences there.

Length wise, the bomb bays seen on the demonstrator and missile arrangement seen on the models suggest bomb bay long enough for staggered placement of pl-12. Since that’s a 4 meter missile in itself, total length of bomb bay allowing for staggered stowage should be 20-40 cm more. Frankly, i still think that bomb bay is just too large for its own good. For a fighter of that size/class, it seems too excessive. Who knows what tradeoffs had to be made to fit all that in. But, like I said, one should really wait for the proper prototype.

was there ever official disclosure of f-35’s ferry range? I can’t find it, so i guess that’s still secret…

Yep, glide bombs are dime a dozen nowadays. Doesn’t look it it has any sort of special guidance either, save for (probable) satnav/ins. Plus it can’t yet be confirmed PLAAF actually has those bombs, it could be an airshow model plane. We’ll see more in the coming days, i guess.