via IDRW.org.
According to Russian Military-Industry Courier weekly and US Aviation News Weekly speculation,China has obtained from Russia the technology for a VTOL fighter jet, and will probably develop a VTOL version of the J-20 stealth fighter jet.Wait.
The technology was formerly used in Russia’sYak-141 VTOL fighter.
A prototype of the R-79-300 engine used in the Yak-141 was sold to China in 1996. In 1998, Russia transferred technology related to the nozzle of the engine to China.
The engine is a vector thrust turbofan with maximum thrust of 8,994 kg, which can be raised to 15,500 kg with additional boosting. Its nozzle can turn 95 degrees downwards with a lifespan of 1,500 rotations.
The Yak-141 is able to take off within a short distance of 5 metres.
It has set many world records for VTOL fighters, including climbing to 12,000 meters in 116.2 seconds with effective load of 2,000 kg and 130.5 seconds with 2,000 kg, and a climbing speed of 250 m/s from the height of 3,000 to 8,000 metres.
What!?
A STOVL J-20?
I can hear the Pentagon pissing their pants all the way from here.
NOTE: This goes out to my American readers in particular. You need to shake yourself out of the belief that China only copies tech and has no ideas of its own. Even if that were true, they're doing something different. They're taking ideas and concepts that have in some cases been rejected here and working them up. The J-20? Its a large fighter/interceptor. We're getting word that a STOVL example might be in the works and the only thing that can be said is that the story is false? The plane has a HUGE fuel load (apparently). Lose some fuel, replace it with a powerful enough lift fan (and since they stole F-35 plans they could simple double the size of the fan on that plane...or whatever engineers do) and they have their plane. They could follow the French example on their Mirage STOVL concept and use multiple lift engines. The issue is that they're progressing and we're cutting. Across the board. Get over the idea of inherent American superiority. We're going to have to do as we always have. We're going to have to work for it.
The J-20 cannot be turned into a STOVL jet. What they are talking about is a new Harrier rip-off. STOVL requires the jet to be single engine(So it is not J-31 either), because of the delicate engine control required of STOVL operation. This is why the F-35 is a single engine jet even though the US Navy wanted a twin engine jet.
ReplyDeletethat's not true. there have been many multi engine prototypes for STOVL aircraft. additionally the Harrier had thrust vectoring and that wouldn't be necessary for the Chinese since they bought the same nozzle we did from the Russians.
Deleteso yeah. in my opinion this might be possible. first, we don't know what the Russians were working on beyond their concepts and second, we're talking about a large plane that can trade space for one hell of a lift fan. maybe, just maybe this is true.
Solomon
DeleteWell, I don't see any space for a frontal lift jet engine in the J-20's fuselage, do you? Considering how far back the J-20's engines are pushed to back, it would take one heck of an engine to lift the J-20 and keep it balanced.
The rule of STOVL design is that the main engine must be placed at the center of gravity. The further away the main engine is away from the center of gravity, the harder it becomes to balance the jet during the landing.
It doesn't matter where the engines are. What matters are where the lift nozzles are with respect to the center of gravity. On aircraft with tricycle landing gear, the CG is just forward of the main wheels. Otherwise, the A/C cannot take off or land conventionally. So, the combined lift mechanisms must act on a vector vertical to that CG. With the big-ass rear nozzles so far aft, there had better be something equivalent forward. Like the F35, they can trade forward tankage for something to lift the nose
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ReplyDeleteyour comments are dead on this blog. you can keep commenting but i'll keep deleting them. you crossed the line and my line stands. pound sand bitch.
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DeleteSolomon,
ReplyDeletePlease *do not* take IDRW seriously. Flagrant bullshit mongering and plagiarism is all they ever seem to do.