Sukhoi PAK FA

[Austin]

Nice. Have you guys done any radar cross-section analysis of the FGFA/PAK FA airframe shaping?

I am sure they must have done that and according to PAK-FA chief designer PAK-FA RCS is close to that of F-22.

The Average RCS of PAK-FA and F-22 is 0.3 - 0.4 m2 for X band and in narrow re-radiation cone as small as metal marble.

 

[p2prada]

Nice. Have you guys done any radar cross-section analysis of the FGFA/PAK FA airframe shaping?

Ausairpower did one using physical optics. That's the only one available in open source.

If you are talking about HAL, then yes. That's how they determined a second pilot would increase RCS by 15%.

 

[Austin]

@p2prada where did you get the 15 % value ?

AFAIK the twin seater would have increased the RCS and would have also needed some structural modification leaving to increased weight and reduced fuel/range.

 

[p2prada]

@p2prada where did you get the 15 % value ?

AFAIK the twin seater would have increased the RCS and would have also needed some structural modification leaving to increased weight and reduced fuel/range.

All that you pointed out and more,

India to get Fifth Generation Fighter Aircraft: Armed Forces International News

The T-50 and F-35 are single-seater aircraft. India have noted that a second cockpit would compromise the aircraft's stealth ability by 15%, in addition to adding extra weight and reducing fuel capacity. Further, R&D costs could increase by an additional $2 billion for the twin-seater version.

This isn't the only source. It was reported by all mainstream media outlets.

 

[anoop_mig25]

Ausairpower did one using physical optics. That's the only one available in open source.

If you are talking about HAL, then yes. That's how they determined a second pilot would increase RCS by 15%.

@p2prada

so is hall is going to carrying out modifications so as to reduce RCS to original level

 

[Armand2REP]

I am sure they must have done that and according to PAK-FA chief designer PAK-FA RCS is close to that of F-22.

The Average RCS of PAK-FA and F-22 is 0.3 - 0.4 m2 for X band and in narrow re-radiation cone as small as metal marble.

Russia has already revealed the frontal RCS. .5m^2. F-22 is measured in cm which is a couple dozen times less.

 

[Defcon 1]

Russia has already revealed the frontal RCS. .5m^2. F-22 is measured in cm which is a couple dozen times less.

Source please? By the way RCS of F22 is also classified.

 

[Drona]

I couldn't find this video in this thread,

Sukhoi T-50 PAK-FA Shooting missile air to air


This is real right ?

 

[Armand2REP]

I couldn't find this video in this thread,

Sukhoi T-50 PAK-FA Shooting missile air to air


This is real right ?

Nope... CGI

 

[Armand2REP]

Source please? By the way RCS of F22 is also classified.

Source is Ajay Shukla , F-22 RCS is clarified as a golf ball.

 

[Defcon 1]

Source is Ajay Shukla , F-22 RCS is clarified as a golf ball.

Ajay shukla is not a source. At least not a reliable one.

 

[Austin]

Russia has already revealed the frontal RCS. .5m^2. F-22 is measured in cm which is a couple dozen times less.

F-22 RCS which is mentioned as golf ball size is frontal RCS in a narrow radiating cone. F-22 average RCS is 0.3-0.4 m2 , PAK-FA average RCS is ~ 0.5 m2 ( both in X band )

This is what PAK-FA chief designer said to quote him
Путин ознакомился с работой над Т-50 | ИноСМИ - Все, что достойно перевода

Chief Designer of the aircraft, Alexander Davidenko indirectly hinted at the size of the effective area of scattering (ESR) of the future fighter. According to him, the ESR of the old generation aircraft (eg, Su-27) is about 12 m ², whereas the F-22A Raptor, it varies in the range of 0.3-0.4 m ². EPR PAK FA will not be higher than the F-22A, it will be very close to them. "

 

[Austin]

T-50 AESA Radar

 

[SilentKiller]

T-50 AESA Radar

Are indian scientists also involved in its dev or research as its no use of paying billions if u don't learn how they are made.

 

[p2prada]

@p2prada

so is hall is going to carrying out modifications so as to reduce RCS to original level

I don't know what you mean.

IAF decided not to go for a twin seater because RCS would be greater than one a single seater.

We don't know if the final RCS will make FGFA more stealthy than the PAKFA or not. We don't know if the engines on PAKFA and FGFA will be the same. We don't know if FGFA will be heavier or lighter than PAKFA. We don't know much about anything.

I suppose we will have to wait until 2014 and beyond to find out. Not a long wait.

 

[Armand2REP]

Ajay shukla is not a source. At least not a reliable one.

Sure he is, especially when it was reported to him by the Indian delegation getting briefed in Russia about it.

 

[p2prada]

Source is Ajay Shukla , F-22 RCS is clarified as a golf ball.

F-22 RCS which is mentioned as golf ball size is frontal RCS in a narrow radiating cone. F-22 average RCS is 0.3-0.4 m2 , PAK-FA average RCS is ~ 0.5 m2 ( both in X band )

Woah! Woah! A big mistake here. Golf ball is too big. That's F-35. The F-22's RCS is at the level of a metal marble. There is about a 10 times difference between golf ball and marble.

Russia has already revealed the frontal RCS. .5m^2. F-22 is measured in cm which is a couple dozen times less.

It was clarified that the officials were talking about average RCS, not frontal RCS. Austin posted the link.

 

[p2prada]

Are indian scientists also involved in its dev or research as its no use of paying billions if u don't learn how they are made.

Yes, but not this radar. IAF has asked for a much more advanced radar. They are expecting 360 degree capability on the FGFA.

 

[SilentKiller]

Yes, but not this radar. IAF has asked for a much more advanced radar. They are expecting 360 degree capability on the FGFA.

one has to learn to walk or even crawl before running....

 

[Armand2REP]

F-22 RCS which is mentioned as golf ball size is frontal RCS in a narrow radiating cone. F-22 average RCS is 0.3-0.4 m2 , PAK-FA average RCS is ~ 0.5 m2 ( both in X band )

This is what PAK-FA chief designer said to quote him
Путин ознакомился с работой над Т-50 | ИноСМИ - Все, что достойно перевода

You don't see a problem with that statement? It says PAK FA will not be higher than the F-22 when we KNOW that is BS. The Raptor is like .03m^2

There are no average RCS figures available for these aircraft. It is always taken from the front and will always be much higher from different aspects.