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

[siegecrossbow]

From 2001 to 2015:

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[Deino]

From 2001 to 2015:

Nice ... and it will be interesting to see how many will be produced in 2015 and even more with what numbers !

My guess - if everything went fine so far and the progress as well as the only minor changes seem to prof that - is the first ones will then already go to the FTTC.

Deino

 

[A Bar Brother]

Dry thrust is more important for an aircraft like the J-20. I suppose anywhere between 100-110 KN should do, if it is in a similar weight class as the F-22.

 

[Deino]

Dry thrust is more important for an aircraft like the J-20. I suppose anywhere between 100-110 KN should do, if it is in a similar weight class as the F-22.

Not sure how Your post relates to any of the last posts, but 100-110 kN is way too less ... the F-22's engines produce 155 kN (some say nearly 160 kN) and the F-35's engine even about 180 kN. So a 100-110 kN is the way to go for the J-31 but surely not for the J-20.

Deino

 

[yanyan25]

Not sure how Your post relates to any of the last posts, but 100-110 kN is way too less ... the F-22's engines produce 155 kN (some say nearly 160 kN) and the F-35's engine even about 180 kN. So a 100-110 kN is the way to go for the J-31 but surely not for the J-20.

What he mean 100-110kN is dry thrust(on military power - without after burner). 155kN for F119 engine is wet thrust(with after burner).

 

[Air Force Brat]

Not sure how Your post relates to any of the last posts, but 100-110 kN is way too less ... the F-22's engines produce 155 kN (some say nearly 160 kN) and the F-35's engine even about 180 kN. So a 100-110 kN is the way to go for the J-31 but surely not for the J-20.

Deino

Yeah! my Daddy used to say you can fly anything with enough horsepower, we were looking at the Super Guppy which was on the ramp at LRAFB at the time, it had four turbo-props on it. No doubt the J-20 will be looking to up the thrust?? But it certainly is impressive to see all six of the flying prototypes that Siege posted, I'm sure that has bring a special feeling to our Chinese Bros in the coming new year, and I would say that they are definitely moving into the LRIP phase! congrats on a fine accomplishment!

 

[A Bar Brother]

Not sure how Your post relates to any of the last posts, but 100-110 kN is way too less ... the F-22's engines produce 155 kN (some say nearly 160 kN) and the F-35's engine even about 180 kN. So a 100-110 kN is the way to go for the J-31 but surely not for the J-20.

Deino

You are referring to wet thrust. I'm talking about dry thrust (without afterburners). And I related it to the discussion in the previous page where people were talking about the AL-31FN Series III delivering 137 KN. They were talking about performance using wet thrust. So I said the focus should be on dry thrust instead because that's where the J-20 will get most of its performance from.

AL-31F's dry thrust is 75 KN.
The F-22's F119 should be 100-110 KN.
117 gives 93 KN.

 

[Deino]

You are referring to wet thrust. I'm talking about dry thrust (without afterburners). And I related it to the discussion in the previous page where people were talking about the AL-31FN Series III delivering 137 KN. They were talking about performance using wet thrust. So I said the focus should be on dry thrust instead because that's where the J-20 will get most of its performance from.

AL-31F's dry thrust is 75 KN.
The F-22's F119 should be 100-110 KN.
117 gives 93 KN.

Then o.k. !

 

[Air Force Brat]

You are referring to wet thrust. I'm talking about dry thrust (without afterburners). And I related it to the discussion in the previous page where people were talking about the AL-31FN Series III delivering 137 KN. They were talking about performance using wet thrust. So I said the focus should be on dry thrust instead because that's where the J-20 will get most of its performance from.

AL-31F's dry thrust is 75 KN.
The F-22's F119 should be 100-110 KN.
117 gives 93 KN.

Well actually all fighter pilots love burner, it is just awesome to get that Kick in the seat of your pants, and frankly, afterburner has saved a lot of airplanes, sometimes what you need is raw thrust to get yourself out of a bad situation? In practice both the J-20 and PAK-FA will need to supercruise to get the most out of their airframes, and fit into the real world in this new century, but we shall see???

 

[Scratch]

Well actually all fighter pilots love burner, it is just awesome to get that Kick in the seat of your pants, and frankly, afterburner has saved a lot of airplanes, sometimes what you need is raw thrust to get yourself out of a bad situation? In practice both the J-20 and PAK-FA will need to supercruise to get the most out of their airframes, and fit into the real world in this new century, but we shall see???

And it does so at a considerable expense of your endurance. While the "raw thrust in certain situations" argument is of course to the point, saving fuel for those situations as much as possible is a prudent idea. Realisticly, I would say modern high-end fighters should have engines powerfull enough to (among other things) get through transsonic acceleration with dry thrust in a reasonable amount of time.