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Thread: Sukhoi T-50 PAK FA

  1. #6466
    Senior Member Elbs's Avatar
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    Quote Originally Posted by abhishek-nayak View Post
    if that was the case why don't we see any flat nozzles in the world????

    dude in a engine having a conical nozzle the efficiency can reach a disproportional high of 90% even if the compressor and turbine efficiency are only 60-70% which no other design can give.
    Because low observable considerations weren't a priority in design until less than two decades ago.

  2. #6467
    Senior Member Mackie's Avatar
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    Quote Originally Posted by abhishek-nayak View Post
    if that was the case why don't we see any flat nozzles in the world????
    Because that's the difference between a nation with tremendous research and funding in stealth technology and the wannabes who put some fancy plates on.

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    Quote Originally Posted by Mackie View Post
    Because that's the difference between a nation with tremendous research and funding in stealth technology and the wannabes who put some fancy plates on.

    hehehe.... but dude spending on R&D for a stealth plane is just one part....building,operating and maintaining a 5th gen fighter can make the richest of rich go bankrupt.

    thats why both F22 and F35 programs are facing crisis.

    How many nations can afford a plane that cost more than 100 million $ a piece?? in case of F22 thats 350 million $ per unit.

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    The PA- 50 is going to make an impact. There is technology on both sides of the Atlantic and what the media usually portray as superior to the rest can change in a eye-wink.Technology change as R&D will make profound changes. Watch this space in the near future!

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    Let me repost these





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    Quote Originally Posted by abhishek-nayak View Post
    [*******#333333]i know that flat nozzles are used for scattering radar waves which is a very critical stealth feature.[/COLOR]
    Its not necessary for the nozzle to be flat. Even a Jalebi shaped nozzle will serve the purpose if it reduces thermal and em signature with loss of thrust being within acceptable limits. A "flat" nozzle helps in increasing the surface area of the plume hence reducing its thermal signature, the serrations on the edges are for EM signature management.
    [*******#333333]
    [/COLOR]
    the only exception to the above is the F22
    Yf-23, X-32. X-47b

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    Quote Originally Posted by void View Post
    Thrust loss for flat engine nozzles vs cylindrical can be as low as 5% supposedly for modern designs, according to some statements from Saturn and Salyut I've read.
    Lower than that.

  8. #6473
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    Quote Originally Posted by abhishek-nayak View Post
    hehehe.... but dude spending on R&D for a stealth plane is just one part....building,operating and maintaining a 5th gen fighter can make the richest of rich go bankrupt.
    .
    Not sure what you're smoking but 5th gen fighters are nowhere near expensive enough to bankrupt a country. Not unless you're buying them by the thousands each year.

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    Surely, F-22 was just a gift horse, no other competitors are in the sky. F-35B is comparable to PAK FA in price terms but it's obviously inferior to the russian toy.
    http://www.ausairpower.net/APA-NOTAM-300309-1.html

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    Quote Originally Posted by xav View Post
    Let me repost these





    very cool Russian air killer

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  12. #6477
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    Quote Originally Posted by geolocator View Post
    Surely, F-22 was just a gift horse, no other competitors are in the sky. F-35B is comparable to PAK FA in price terms but it's obviously inferior to the russian toy.
    http://www.ausairpower.net/APA-NOTAM-300309-1.html
    Aus air power is a joke.

    The F-35 is in no way "inferior to the Russian toy"

    The dudes as Aus air power despise the F-35 for some reason.

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    Quote Originally Posted by T.C.P da Devil View Post
    Aus air power is a joke.

    The F-35 is in no way "inferior to the Russian toy"

    The dudes as Aus air power despise the F-35 for some reason.
    While that site may not be particularly informative it's hard to imagine, based on projected performance, how the F-35 will match the Pak Fa. Assuming the F-35 has superior stealth characteristics the Pak Fa can be expected to surpass or match the F-35 in every other category. Speed and maneuverability are obvious, a result of aiming for a super-cruising engine and an evolution of the Flankers already superb maneuverability as well as having two engines vs one. Radar is likely to be a tie with any margin for error leaning towards the Russians, the American advantage in AESA design being eroded by the size available to the Pak Fa. Range also goes to the larger aircraft. It seems like while the Russians may be behind in technological terms in a few categories they have compensated and then some by simply providing a larger airframe to work with and reaping the advantages of such where the F-35 must compromise to fit everything within it's space and weight constraints.

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    Given that PAK-FA actually deliver it promises it is superior even to F-22 in a very important detail: it would have a 2 seater version.
    Simply put, according to actual Nato doctrine , no A2G mission without 2-seater in the pack, as show in Lybia.

  15. #6480
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    Considering the aircraft were developed for two different roles it's rather unfair to compare the two. It remains to be seen if the PAK-FA will deliver or not as all we have seen so far are a few prototypes without radars and have not to my knowledge conducted any weapons tests as of yet.

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