J-20 5th Gen Fighter Thread IV (Closed to posting)

[MiG-29]

PLEASE be careful. We all know that the J-20 is NOT larger or longer than the Flanker, as such to assume it is heavier is pure speculation.
I agree with You that is surely limited in its performance until the final WS-15 arrive.

Besides that I learned from a Russian source, that CAC was indeed able - similar to the J-10 deal - to purchase a J-20 tailored version of the AL-31FN incorporating features from the M1 or even M2. Sadly no additional information, but if this is correct, a version with 132-145 kN could be indeed a suitable interm engine.

Deino

According to semi-official sources J-20 is a 17 tonnes, that is heavier than regular Su-27s for at least 1000kg.
The Al-31M1 is a 13 tonnes engine, still low power for a 35 tonnes fighter, Al-31M2 is in tests so is not possible J-20 has it.


“The overall engine size will be subject to no trade-offs so as to keep the AL-31F upgrade conveniently suited for re-engining of the whole inventory of Su-27 aircraft without any additional airframe and engine nacelle modifications.” - said Gennady Skirdov, Salut's acting General Designer.

It is planned to have the program of special test-bench and endurance tests accomplished before the end of 2012 and go ahead with the special flight tests, which precede the state certification tests.

Vladislav Masalov, Director General of Salut, said that the full-scale deliveries of upgraded engines could be started as early as 2013. “The AL-31F M2 engine can be a not so expensive solution for re-engining of Su-27, Su-30 and Su-34 fleet now operated by the Russian military and is likewise deliverable to foreign customers,” noted Director General. The technical specifications and requirements of Su-27SM and Su-34 aircraft call for the engines with increased thrust and improved fuel consumption with the AL-31F M2 fulfilling these requisites. The installation can be performed without any rework

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Until year-end 2012, the special bench and endurance test programme is to be completed and the special flight test programme is to begin. The flight trials of the AL-31F-M2 are supposed to involve using a Su-27SM the Sukhoi company may provide or Gromov LII’s Su-27 flying testbed used for testing the AL-31F-M1.

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F-22 weighs more than 19000kg at empty weight, the volume increase of internal weapons bays and its structural weght, this won`t make it lighter than a flanker.

J-20 is very likely near 18 tonnes at empty weight something in the region of 17800kg at the lightest if the semi official source of chinese TV is right.

J-20 is at the same range of T-50 at its lightest possible empty weight.

In my opinion it weighs around 18500kgs but a 17900kg range is possible

 

[jobjed]

According to semi-official sources

Heh.... ok.

 

[latenlazy]

According to semi-official sources J-20 is a 17 tonnes, that is heavier than regular Su-27s for at least 1000kg.
The Al-31M1 is a 13 tonnes engine, still low power for a 35 tonnes fighter, Al-31M2 is in tests so is not possible J-20 has it.
F-22 weighs more than 19000kg at empty weight, the volume increase of internal weapons bays and its structural weght, this won`t make it lighter than a flanker.

J-20 is very likely near 18 tonnes at empty weight something in the region of 17800kg at the lightest if the semi official source of chinese TV is right.

J-20 is at the same range of T-50 at its lightest possible empty weight.

In my opinion it weighs around 18500kgs but a 17900kg range is possible

I don't believe the 17 tonne figure. Keep in mind though they don't have to fly the thing with full fuel tanks.

 

[MiG-29]

I don't believe the 17 tonne figure. Keep in mind though they don't have to fly the thing with full fuel tanks.

i do not what engine, niether the weight, if it weighs 17 tonnes, the engines must have supercruise, but supercruise on F-22 is not for an hour, it is less than an hour.
Think with full afterburner most jets won`t fly more than 5-7 minutes at full afterburner.
J-20 needs something like 119, Al-31M1 still is not the engine for T-50 or J-20, the Russians say 129 is the engine they want, not even 117 is satisfactory

 

[latenlazy]

i do not what engine, niether the weight, if it weighs 17 tonnes, the engines must have supercruise, but supercruise on F-22 is not for an hour, it is less than an hour.
Think with full afterburner most jets won`t fly more than 5-7 minutes at full afterburner.
J-20 needs something like 119, Al-31M1 still is not the engine for T-50 or J-20, the Russians say 129 is the engine they want, not even 117 is satisfactory

Not disagreeing there, but keep in mind the purpose of using inferior engines is to speed up the testing process, not to go into production with them.

 

[Lion]

Pretty sure both are AL-31s.

If both are AL-31, why put out one with silver nozzle and the other don't?

 

[Deino]

Maybe since they think there's no longer a need to fool us !

Honestly I don't know but if they are indeeed AL-31FN - and by comparing the nozzle design, the number of pedals, the inner structure, even the sound ... - there's no longer a need to make us think they were special engines, which surely was another PLUS when the figther came out (a PR-stunt as such !)

Just my two cents.
Deino

 

[usaf0314]

Not sure if PS but its going on my desktop..

 

[Munir]

Not sure if PS but its going on my desktop..

A bigger version would be appreciated...

 

[delft]

Can Anyone Explain The Engines?

We're missing another detail: this is 2001 with the main wheels down but with the forward well doors closed.