Sukhoi PAK-FA / FGFA: Updates,News & Discussions

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No 52
Taken on: 17th August 2011

 

[DARKY]

No 52
Taken on: 20th August 2011

---------- Post added at 08:49 AM ---------- Previous post was at 08:47 AM ----------

No 52
Taken on: 14th August 2011

 

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Along with flanker.

And one Amazing Photo.

 

[aimarraul]

.sukhoi.ru

 

[DARKY]

Well since we don't have a benchmark to classify an engine for 5th or 4th gen , I did a rough back of the envelop calculation for T:W ratio of Flanker,PAK-FA ,F-22 and F-35 fighter engine

1 The AL-31FP ,AL-31F and AL-31FN engine of Su-30MKI, J-10 and Su-34 generates a thrust of 12.5T and weighs 1520 kg which puts it in a T:W ratio of 8.2:1
2 The newer AL-31FM1 engine for newer Su-34 generates a thrust of 13.5T and weighs 1520 kg which places it in a T:W ratio of 8.8:1
3 The 117S ( AL-41F1A ) engine of Su-35 fame generates a thrust of 14.5 T weighs 1520 kg and has a T:W ratio of 9.5:1
4 Coming to PAK-FA 117 engine it weighs 1420 kg and generates a thrust of 15 T with T:W ratio of 10.5:1

Comparing similar 5th gen engine of American Fighter F-22 and F-35

5 The F119 engine of F-22 generates a thrust of 16T and weighs 1772 Kg and has a T:W ratio of 9:1
6 The F135 engine of F-35 generate a thrust of 19.5T and weighs 1701 Kg and has a T:W ratio of 11.4 :1

PAK-FA engine compares favorably with American 5th Gen Engine in T:W class and superior to F-22 engine while the F135 is the best engine in T:W class

Reference
1 source: -31// > -
2 source: FEDERAL STATE UNITARY ENTERPRISE «GAS-TURBINE ENGINEERING RESEARCH AND PRODUCTION CENTER «SALUT» | Production | AEROENGINES
3 source: 117 > -
4 source: Saturn AL-31 - Wikipedia, the free encyclopedia
5 source: Pratt & Whitney F119 - Wikipedia, the free encyclopedia
6 source: http://en.wikipedia.org/wiki/Pratt_&_Whitney_F135

Courtesy :Austin BR FORUM

F-35 engine has higher T/W as it is a single engine plane..... hence higher thrust requirements as opposed to a double engine plane since its weight category aswell as electronic power requirements.

Item 117 could end up with even higher thrust we cannot be sure until it completes its development many new technologies like increased use of composites wold be incorporated to reduce the weight of engine aswell as the bird.

The author of this post has taken the thrust level of 117 as 15T in accordance with the thrust level of the 14.5T of item 117C/S used on Su35BM and the engine used of PT-51 of PAK FA perhaps while the actual engine of PAK FA would have thrust level in excess of 20+ T as mentioned by many journals issued by Sukhoi corporation aswell as defense analysts.

The 5th gen. aspect of engine cannot of determined only by thrust levels If it were so then item 129 or type 30 perhaps were the 1st 5th Gen. turbofans since they had about the same level of thrust as F 119 as beck as 1980s.

The 5th gen. engine would be classified more on the basis of lighter weight, greater strength, Automated digital control, Supercruise properties, higher fuel efficiency, spontaneous throttle changes or at very fast rate, longer life aswell as TVC control, Heat signature reduction...etc.

Russia has already displayed Al-41 with 20T thrust levels which were used of Mig 1.42 prototype but the engine is a bit larger to be fitted on PAK FA and hence requires some tweaking done aswell as reduction in weight with use of composites and incorporating newer technologies to increase thrust levels thanks to the evolution process of Al-31 and item 117C/S.

 

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[Lord Of Gondor]

@The last photograph......................wow!!!

 

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NPO Saturn reveals cause of PAK-FA engine flame-out

A malfunction in the automatic flight control system was the cause of the Sukhoi PAK-FA's starboard engine flame-out at the MAKS Moscow air show, according to Russian engine maker NPO Saturn.
Speaking to the Russian media two days after the incident, NPO Saturn general director Ilya Fedorov acknowledged that the starboard engine "suffered [a] surge".
A bright flame was seen to erupt from the powerplant when the fighter was halfway through its take-off run at Ramenskoye airfield on 21 August. According to Fedorov, this was due to a malfunctioning sensor which began feeding "erroneous data" to the airplane's control system.

He thanked Sukhoi test pilot Sergei Bogdan for his prompt reaction to the engine malfunction. "It was a test for the new machine. During flight trials on any brand new aircraft - and this airplane is undergoing flight trials - malfunctions such as this one are not only possible, but even mandatory."
Fedorov said: "The motor did not fail - in fact, it was put by erroneous control input into a wrong mode that caused the surge. This is not an engine failure, but the wrong data input caused by a malfunctioning sensor feeding data to the flight control system.
"After what had happened the motor was checked [and] the malfunctioning sensor was replaced by a good one. Today, there is no issue with this engine."

NPO Saturn reveals cause of PAK-FA engine flame-out

 

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In the setting sun.

 

[DARKY]

 

[DARKY]

---------- Post added at 04:49 AM ---------- Previous post was at 04:48 AM ----------

A meeting on the Runway

---------- Post added at 04:50 AM ---------- Previous post was at 04:49 AM ----------

 

[Army Strong]

Ugh, something has to be done about the engines. They show way to much for a 5th Gen Plane.

 

[sancho]

Ugh, something has to be done about the engines. They show way to much for a 5th Gen Plane.

Because this is only a prototype for early flight tests, with an interim engine. The final versions is expected with 2 or 3D TVC, different nozzle design.

 

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[razgriz19]

PAK FA/ T-50 in Ace Combat - Assault Horizon