yes [USER=”76365″]RALL[/USER] I’m using AEW as example for the graph.

Thanks.

I am reading last page and i am litle confuse about sometimes is is possible have better rcs in L band than X band….really i thought always will be worst rcs for stelth fighters in L or UHF bands. Of course bombers as B-2 is different.

Optical – location station 101 KS-B has two modes:
– mode of operation, the cap is turned forward glass (3)
– stealth mode, cap turned glass back

position 2 – part of the fairing covered with radio-absorbing material

[ATTACH=CONFIG]n3847991[/ATTACH]

Part 2: this is when sensor is hide….

When sensor is on work position, it is a problem.

What is the maximum width of the frequency band for a radar in a fighter? it is some phisical

I think this percentage in Tejas is about surface. On your link do not put nothing but it seems its surface percentage, not weight percentage. In case of surface percentage, EF 2000 its more than 80% (CFC+GRP)

@RALL – OK, I’ll accept that. But then the follow on is: and what did they gain from that? The F-22 and such shows you can do just fine with around 25%. I’m not aware of anything where the Typhoon really stands out.

i do not know it, but from inside website of the Eurofighter typhoon, they tells this…

THE AIRFRAME

The aircraft is built with advanced composite materials to deliver a low radar profile and strong airframe. Only 15% of the aircraft’s surface is metal, delivering stealth operation and protection from radar-based systems. Pilots were included in the design from the earliest stages to develop a deliberately unstable airframe that can still be flown effectively. This delivers both superior manoeuvrability at subsonic speeds and efficient supersonic capability to support the widest range of combat scenarios.

THE MATERIALS

Strong, lightweight composite materials were key to the design of Eurofighter Typhoon to give it deliberate instability. Using them means the weight of the airframe is 30% less than for traditional materials, boosting range and performance as well as reducing the radar signature.

PRODUCTION

The innovative production techniques developed for Eurofighter Typhoon have created a whole new industry for the most effective use of advanced composite materials. These provide greater tensile strength and more aerodynamic performance with less weight and more reliability than traditional materials.

THE TWIN EUROJET ENGINES

Developing cutting-edge engine technology has been a key part of the Eurofighter Typhoon project from the start. Four global companies have jointly developed the high performance EJ200 power plants that each provide 90kN of thrust from a small lightweight engine with high strength and high temperature capability.

The two-spool design with single-stage turbines drives the three-stage fan and five-stage HP compressor with annular combustion with vaporising burners. This allows Eurofighter Typhoon to cruise at supersonic speeds without the use of reheat for extended periods. The engines deliver 1,000 flying hours without needing unscheduled maintenance through the use of advanced integrated Health Monitoring for class-leading reliability, maintainability and Through Life Cost.

https://www.eurofighter.com/the-aircraft

Everybody talk about Raptor, and its ok, its normal because its a real VLO, but EF-2000 is a masterpiece.

There are some video an EF-2000 with full load weapons and external tanks, doing some spectacular maneuvers. I did not see to any other aircraft doing it. And really this airplane is better in high altitudes, it was designed for it and supercruise. I like many this fighter, i am not impartial.;)

Um, you are making the mistake of comparing percentages by weight (Su-57) to percentages by surface area (Eurofighter). Those are two very different things! The construction of the Su-57 matches other modern fighters.

Actually the weight percentage of composite materials used in the construction of the Eurofighter is around 50% (70% surface), that’s like 2 times (ratio weight percentage) more than composite materials used in the Su-57 according to that graph. People understimate the Eurocanard and really after F-22 and now F-35 it is a impresive airplane.

It looks like the fanboys (on both sides) were shown to be wrong. The program wasn’t cancelled and nor is it entering into any substantial production soon. I argued as much on page 8 of this thread. The success of the Su-57 is dependent on the Izdeliye 30 engines. The Su-57 was never designed to achieve all aspect VLO with the 117s and nor can it. The Russians are very experienced at taking turbofan designs through the testing phase. If there were anything wrong with the Izdeliye 30 they would almost certainly would have already discovered it and began working on a fix. Almost! There is always some risk, and with Russia’s current budgetary conditions they are simply going to avoid it by waiting. They will build just enough small batches to keep the workforce proficient, but they won’t ramp up production until the engine has passed its tests. The latest info suggests 2023.

Watch the engine flights. They are the best indicators of the health of the program.

Totally agree, in fact i think will not have more Su-57 till this new engine will be produced. So, maybe people must not wait more than this 2 units on next 3-4 years.

From time ago they talked around 2023-2025 when this new engine could to be introduced. But engine is a big issue, all can be delayed if do not have enough reliabilty. Really i do not know how they did not work on new engine before of this proyect Pak Fa. I think maybe they though with the current engines was enough…

Is it similar to sniper pod?