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TooCool_12f

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Viewing 15 posts - 2,611 through 2,625 (of 3,094 total)
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  • in reply to: Canards and stealth. . . #2401012
    TooCool_12f
    Participant

    Yep. After the Tornado follows the F-18.

    Another quiz question.

    What Jet used AESA first?

    Mig-31 if i’m not mistaken

    in reply to: Rafales for Brasil #3, Cachorro-quente! #2401174
    TooCool_12f
    Participant

    I guess you’re talking about the first deployment for rafales who went there more on “check rides” than any combat (F1 Rafales were only air-air equipped, and pretty lightly to be more precise)… and still managed to do quite well against USN in ACM training

    in reply to: Why 3 different F-35 ? #2401699
    TooCool_12f
    Participant

    er, and you know that, how?

    the point put forward by rafale conceptors is the complete sensor fusion to give the pilot a full picture of what’s around him without ever having to wonder what sensor to use etc… it’s all integrated and displayed in front of him… not on the helmet’s visor but on his dashboard… as MSphere pointed, it may be “less sexy” but what information is the F-35 supposed to give to the pilot, once it’s it’s finished, of course, that the rafale one won’t have?

    in reply to: Canards and stealth. . . #2401705
    TooCool_12f
    Participant

    and it has red painted parts to be more visible… 😀

    in reply to: Canards and stealth. . . #2401718
    TooCool_12f
    Participant

    None sense, which report told you F-22 can pass Mach1 without AB at see level?

    eing sea level, the speed of both F-22 and F-15 are quite similar.

    http://forum.keypublishing.com/attachment.php?attachmentid=184446&stc=1&thumb=1&d=1273195400

    something strange with that pic:

    the F-15 would be limited to M1.6-1.7 in full AB… I was under the impression that the eagle was capable of going beyond M2.0 (up to M2.5 from my various readings)

    in reply to: Why 3 different F-35 ? #2401749
    TooCool_12f
    Participant

    one things still amazes me: how people can consider the beginning of “operational service” for the F-35 in 2012 while as of 2010 it has barely scratched the surface of what has to be tested? the flight tests are still in the beginning, ans it seems quite unlikely they can manage to do all the tests (with analysis and defects correcetion, of course) in the next 2 years..

    of course, one can always put untested aircraft into service, and let the operators discover the eventual problems… but that wouldn’t seem very logical (and may be quite dangerous for the pilots and people who may happen to be beneath them at the wrong moment)

    in reply to: Canards and stealth. . . #2403309
    TooCool_12f
    Participant

    er, two things:

    – these are “school aircraft” which means that the pilots doing the stuff are most certainly students and therefore, it is also possible that their cobra manouver isn’t exactly “perfect”

    – considering “banking”: the first cobra is executed by the leader of a close formation. seems to me that he banked more to get some lateral separation before doing his manouver than because it would have been “necessary” (you don’t want to break hard while your buddy is almost directly behind you)

    besides, if the draken had poor lateral stability, the last thing it would want to do is bank before going to extreme AoA… that would be the best way to get itself into a spin

    in reply to: Why 3 different F-35 ? #2403590
    TooCool_12f
    Participant

    gotta love that quote:

    The LM people know full well that the ‘range’ of the F-35 is significantly greater than 1200nm & if any where reading this they would probably laugh themselves to death at how duped you (& others are) are.

    I also find it particularly revealing how you completely dismiss anything/everything positive LM (or anyone else) has to say about the F-35 but suddenly believe they are telling the truth when you are able to spin it into a negative light.

    so they are selling a product, and, on their own official website, where everybody can see it, they intentionally stated lesser than real specs to dupe people on internet?

    man…

    kid…

    I don’t know how to call you, seriously…

    do you ever think before posting?

    in reply to: Canards and stealth. . . #2403771
    TooCool_12f
    Participant

    actually, the fact that they do cruise at 80% throttle means they go supersonic for a cerrtain period of time at that power setting.. but can you find any publication saying that they reached M1.8 (declared top speed for supercruise) at 80% throttle?

    in reply to: Canards and stealth. . . #2403775
    TooCool_12f
    Participant

    The F-15 does not generate less drag for the following reason, at sea level, the F-15 won`t reach Mach one at military power alone, to reach its max speed of 1.2 will need afterburner, for crusing speed using the Max military power the F-15 will fly in a range of 800km/h, to fly at around 1300km will already use afterburner; the F-22 will pass mach 1 without the use of afterburner and the F-22 will lit the afterburner just when is very close to its max speed at sea level.

    Who do you think is more efficient at 1200km/h?
    F-15 using almost the max setting of its afterburner or F-22 still at not of its max of military power?

    Now apply that to dogfights, the F-15 will need to use afterburner to be in the range of its most agile envelopes of Mach Mach 0.8 where most of of doghfights will take place the F-22 won`t and still won`t be in its max of military power now you can undertand why the F-22 has almost 70% better STR

    you don’t seem to get the point:

    with or without AB the F-15 has much less thrust available with same power setting than the F-22 They don’t use the same engines. if you want to compare aerodynamics, you need to put other parameters at the same level: -> same amount of thrust for both aircraft. how to do that? The only other option would be to put F-22s engines into the F-15, but we all know it won’t happen.. so what do we have left?

    F-15 in AB reaches the thrust the F-22 has dry: so to compare the two airframes from the aerodynamic point of view you have to use the figures where the F-22 flies dry and f-15 in AB.

    will the f-15 burn more fuel? yes, but it’s irrelevant from aerodynamic POV.

    What does count in this comparison is that the f-15 reaches higher speed with the same amount of thrust available (little over 20t of thrust). That means that it produces less drag, plain and simple.

    Basically, if the US put raptor’s engines in the f-15, eventually some electronics from it too, the F-15 would probably fly circles around the raptor. The only thing where the raptor would be better would be LO level… otherwise, it would get eaten alive

    in reply to: Canards and stealth. . . #2403829
    TooCool_12f
    Participant

    Just a couple things to consider-

    A-The F-22 doesn’t supercruise at military power.
    B-What’s the fuel consumption of both aircraft at M1.8?

    ok, let’s see:

    A: definition of supercruise?

    cruising at speeds above speed of sound without using AB.

    max supercruise speed? seems logical that it’s what you get if you push your engines to the maximum military power (just a notch under lighting AB)

    so can you explain to us what power the F-22 uses in your opinion to reach max supercruise speed?

    B: what does that have with the discussion? we’re talking about drag the airframes generate: same thrust with the same drag provide same speed: same thrust and less drag brings more speed and vice versa.

    with the same thrust, the F-15 goes faster than the F-22 that obviously means that the f-15 produces less drag than the f-22… if you can point anything that is illogical in that reasoning, please do so

    in reply to: Canards and stealth. . . #2404014
    TooCool_12f
    Participant

    actually, a simple way to compare the two would be to give them the same amount of thrust and see what it gives (talking airframes as such).

    if the F-22 is more efficient aerodynamically (less draggy), it should be ahead..

    the f-15, with PW F100-220 turbofans, in full Ab has about 22t of thrust overall

    http://en.wikipedia.org/wiki/F-15_Eagle

    the f-22 has about 21t of thrust dry.

    http://en.wikipedia.org/wiki/F-22_Raptor

    from there on, it’s quite simple: the F-22 at max military power and the F-15 at max AB thrust generate the more or less the same thrust (less than 5% difference).

    The F-22 goes up to something like M1.8 in such conditions. The F-15 reaches around M2.5.

    from these numbers it seems quite obvious that the f-15 aircrame generates less drag at supersonic speeds

    in reply to: Why 3 different F-35 ? #2404167
    TooCool_12f
    Participant

    LM also had brochures stating M1.5 for the F-22(and it’s now known to be ~M1.8), and they’ve put out briefings showing greater combat radii than the claims in the brochure. What you’re failing to do is to update your hypothesis, once new data becomes available. In otherwords you’re failing to use deduction and inference, in order to extrapolate the information. Simple logic tells us that if the max range is 1200nm, then the combat radius can’t possibly be 600nm or greater. So you either accept that that’s the case, or that the 1200nm figure is very conservative.

    actually, we agree on one thing, the ferry range should be greater than 2*combat radius.. however, I’ve never seen a commercial underestimating products capabilities, only overclaiming… so, according to the logic behind any commercial statement, one should more have a tendency to believe that the 1200nm is me max expected ferry range and 600nm combat radius a commercial talk (exaggerated), rather than thinking that combat range is accurate and they purposely underestimated the ferry range… again, it’s just a matter of logic used in any commercial. either you take it as it is, or if you’re sceptical, you should consider reduced numbers, not increased.

    as for briefings where they say it’s more, Id love to see them (and no, pfcem’s posts don’t count… 😀 ). for now, all I have is a presentation on the LM’s official website which seems to be the most official thing right now.

    in reply to: Why 3 different F-35 ? #2404213
    TooCool_12f
    Participant

    What you’re not taking into consideration is that the maximum straight line range is not combat radius X 2. You’re not taking into account station time, or % reserves on the back end of the flight. Secondly the F-35’s combat radius is higher than what’s in those brochures too, so why is it so hard to accept the fact that the range given therein, is very conservative too?

    you should tell that to LM people who presented their document.

    I don’t have to take anything into account, I don’t calculate anything, open the link and read by yourself: it’s the range stated by LM today, not me. I can’t say it more clearly:

    LM SAYS: MAX RANGE = 1200nm

    now if that isn’t clear enough, maybe you don’t understand english? if that’s the problem I can’t help you

    in reply to: Why 3 different F-35 ? #2404295
    TooCool_12f
    Participant

    Dream on.

    The combat radius of the F-35A is 625nm (~1157.5km) on internal fuel, that makes its ‘unrefueled range’ on internal fuel significantly greater than 1200nm (2222.4km), a realistic ballpark figure would be 1500nm-1750nm (2778.0-3241.0km).

    And the rest of your ranting in that post are just as incorrect.

    so your “ballpark figure” is about 300 to 500nm more than what LM claims… it would be the first time that commercial talks show up to /3 smaller figures than reality

    for LM statement:

    http://www.lockheedmartin.com/products/f35/index.html

    you click on the link “product brochure” on the right and you get some nice pdfs where it states what I just said… ~1200nm ferry range for the “A” version, little more for the “C” one

Viewing 15 posts - 2,611 through 2,625 (of 3,094 total)