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kilcoo316

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Viewing 15 posts - 466 through 480 (of 721 total)
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  • in reply to: Can Su-30MKI supercruise? #2544804
    kilcoo316
    Participant

    Less than 15% of the stealth of the F 22 come from the RAM coating; the rest derives from other things like the shape or the material the Raptor is built. BTW metric radars are not something new; in fact they are among the oldest πŸ˜€ the Raptor was tested against and nothing hepened…

    Irrelevant.

    When the radar wavelength is of the order of the feature/target size, then you’ll get returns irregardless of shape and coatings.

    The wavelength is too large to direct, it is too large to absorb. Basically, nowt you can do. [Well, maybe that plasma stuff would work, but thats way out of my field].

    in reply to: Can Su-30MKI supercruise? #2545804
    kilcoo316
    Participant

    Seen the website, fair enough – I’ll take it that it acheives M 1.7 in SLF w/o afterburners.

    Not entirely convinced of the technical merits of the site due to the magical single dB slot for RCS.

    in reply to: Can Su-30MKI supercruise? #2545830
    kilcoo316
    Participant

    Your referring to f22-raptor.com?

    in reply to: Can Su-30MKI supercruise? #2545844
    kilcoo316
    Participant

    Hmm, I wouldn’t exactly say hilltoptimes is a reliable source on aviation news, especially considering the way it is written.

    β€œToday I flew the Raptor at speeds exceeding (Mach 1.7) without afterburners,” General Jumper said.

    Exceeding…. what? the brackets traditionally indicate a clarification on the part of the reporter, not the words as spoken by Gen. Jumper.

    Unless that is standard fare in American English [to be fair, it might be and I’m getting the wrong end of the stick], or bad journalism. I would not use that specific source as evidence the F-22 can do M 1.7 in SLF without afterburners.

    Most of the figures I see are M1.58 w/o afterburners.

    in reply to: Can Su-30MKI supercruise? #2546012
    kilcoo316
    Participant

    Bring_it_on, how saturated are the skies in training exersizes compared to an actual war?

    Supercruise will offer bigger advantages if you can stretch your legs to run around the other guy when he is fuel constrained. But if you trip over another flight on the way you largely negate that. Do you see what I am saying? I dunno either way if it would be an issue or not, but it would be worth considering when taking isolated exersize results and applying them to a wider general action.

    in reply to: Can Su-30MKI supercruise? #2546017
    kilcoo316
    Participant

    my point is that neither you nor I can prove that the russians dont subscribe to the concept of supercruise !! Atleast on face value they do subscribe to it as is evident from the PAKFA . That leaves the other dominant 4.5,5th gen force and that is the Europeans who also subscribe to the concept of Supercruise . That makes 3 out of 3 of the top aviation industries and Military structures of the world and leaves only you on the other side of the fence πŸ˜‰

    I think you’ve missed his earlier point though.

    The EF2000 achieved ‘supercruise’ purely coincidentally, it was never a design goal. To say they ‘subscribe to the concept’ because they achieved it might be stretching it a little far.

    I suppose to know if supercruise is a key ingredient we’d need to examine the missions.

    On a BARCAP for instance, its not really an advantage, your looking at loiter times, and that will be subsonic flight. When you detect bandits, you’ll accelerate to Vmax to enlarge the engagement envelope of your AMRAAMs. Same for HVA protection.

    If the F-22 is escorting other packages, they will be subsonic, so the F-22 will be constrained by that.

    Even on regular CAPs, if they are covering areas, they will be seeking loiter times, and will be in subsonic cruise seeking to minimise fuel consumption.

    The only time I see supercruise offering a definite, significant advantage would be operating the F-22 in hunter/killer groups, letting them roam free from others and strike deep over the enemy line. Going after their AWACs and their CAS/strike/SEAD/interdiction aircraft before they get near your line.

    Assuming long wave length radar can detect the F-22, B-2, F-117 etc at useful [its not that big an assumption btw, infact, its not really an assumption at all], the best way I see supercruise being used is tying up alot of enemy aircraft chasing something they simply cannot catch quick enough to engage. Then, when they are at bingo fuel, turn and nail them.

    As is obvious, it is better to have the option of going faster if you have it, and its another feather in the F-22’s cap, but I think it is some distance down the order when looking at what gives the F-22 the ‘edge’.

    in reply to: Can Su-30MKI supercruise? #2546062
    kilcoo316
    Participant

    In 30 years time, surely DEWs will render supercruise and such things totally irrelevant.

    Laser strength at what range will surely be the defining factor in warfare, wouldn’t it?

    in reply to: Can Su-30MKI supercruise? #2546102
    kilcoo316
    Participant

    geez…and what you think the missiles stop him reaching supersonic??? The flanker can fly mach2.35 with missiles for couple of minutes too. Just for information the missiles will cause him another 0.005 Cd, but when the Su-27 layout has around 0.04 Cd at mach 1.5 when clean config, so no big deal at all. As I said the fllanker may have smaller radius when supercruising, that`s where the increased drag from those missiles is to about to manifest.

    Just wondering where you get these numbers from?

    Its also worth noting that the drag coefficient for an aircraft with external missiles etc will vary from subsonic to supersonic flow as the interactions between wing/pylon/missiles changes with flow regime.

    in reply to: F-22 Doing A Cobra Maneuver #2546861
    kilcoo316
    Participant

    A Cobra isn’t going to save an aircraft from of HOBS missile :rolleyes:

    Maybe, maybe not.

    But while the other guys is firing from a off-bore angle of say, 120 degrees, you can be firing from an angle of 20.

    Thats gotta be worth something.

    in reply to: Can Su-30MKI supercruise? #2547046
    kilcoo316
    Participant

    Nah, I’m getting mixed up somewhere – disregard my previous post.

    in reply to: Can Su-30MKI supercruise? #2547073
    kilcoo316
    Participant

    As far as I was aware, the F-22 has a range of around 250nm at max military power [that would give it 500nm in a straight line].

    I could well be wrong on that, but I think I seen that somewhere. The 800nm was its subsonic cruise straight line figure.

    in reply to: Typhoon – Beauty or Beast? #2549270
    kilcoo316
    Participant

    Can’t believe there aren’t more posts for the Draken!!!

    http://www.bmlv.gv.at/images_skaliert/ostarrichi_draken_1200x847_1159209573.jpg

    http://www.ilexikon.com/images/b/bb/SaabDraken.jpg

    in reply to: Unmanned Aircraft needed to defeat 30 g SAMS #2550272
    kilcoo316
    Participant

    And the “wonder-weapon” will carry unlimited energy to fuel its laser. The missile will be easily detectable. Or not?

    Then I think missiles will not be obsolete. The next thing after the stealth fighter is the “stealth missile”, a missile, that does not show up on fighter’s RWR.

    A vehicle capable of 30g? Please remember that it needs structural strength, lift/control capability and most of all energy. The “30g-UAV” will evade the first missile and be a sitting duck for the second. At least the third.

    We are talking a laser in the MW range….

    Do you know how much power a high BPR turbofan can put out? [Just to clarify – I don’t see fighters, as they are currently, existing in the new era].

    It will always be detectable at enough range for a laser to engage.

    Mach 4 or 5 for a missile doesn’t really compare to Mach 900,000 for the laser. We know that current AESAs are extremely agile, so I don’t see a laser based on that principal being too slow to react.

    in reply to: Unmanned Aircraft needed to defeat 30 g SAMS #2550387
    kilcoo316
    Participant

    Missiles will shortly be obsolete.

    When aircraft carry lasers capable of melting the sensors on a missile, the whole thing will change again.

    The future [as regards initial DEW usage] will probably revolve around large aircraft with multiple laser arrays. Something like a modified C-17 or C-130.

    in reply to: F-22 Doing A Cobra Maneuver #2550812
    kilcoo316
    Participant

    In order for your master plan to have a snowball’s chance you have to know where to put the Mig-31 in the first place for it’s optimal look. Want to explain how you’re going to do that when you can’t see the F-22?

    Thats not a problem.

    Remember long wavelength radars can see all “stealthy” aircraft at sufficient distances to be useful [actually, pretty much any distance from what I understand – VLO tech simply doesn’t apply to these wavelengths] – achieving sufficient resolution for target tracking is not good enough, but it should be enough to direct resources to the area.

    I disagree in that the tactic will not work, as even with a high flying MiG-31, you’ll not generate sufficient angles between radar and target to get the returns necessary for detection/lock. Look at the upper surfaces of the F-22, is there anything at more than 30 degrees to the horizontal? [apart from the ‘vertical’ fins and brief area around the cockpit – but its broadside]

Viewing 15 posts - 466 through 480 (of 721 total)