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wrightwing

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  • in reply to: Yet another F-35 thread #2394052
    wrightwing
    Participant

    None could sustain that, it is just a temporary achievement from the momentum before “controlled” flight is departed.

    The F-35 can sustain 55 deg, though it wouldn’t be useful, but it is a testimony to its FCS. The F-18’s sustained AoA is more in the 35-45deg range.

    in reply to: PAK-FA Saga Episode 13 #2394056
    wrightwing
    Participant

    Was all going well until the follow-on paragraph (bolded).

    Bill Sweetman is a journalist I respect, but if he really thinks LPI is non-detectable…

    (He is probably just regurgitating what Boeing/LM/whomever said)

    Oh, and what are the implications of the underlined bit? A quick active pulse directed to the target… then launch?

    No one is saying LPI is undetectable, but the probability is low.

    in reply to: PAK-FA Saga Episode 13 #2394067
    wrightwing
    Participant

    Of course, the AN/ALR-94 cannot cue a radar guided AAM.

    IF the F-22 had IRST, and IF the F-22 had long ranged IR AAMs… like say a R-27ET… then cues can be made from passive sensors.

    Be careful applying sweeping generalisations. 🙂

    Actually that’s not correct on several counts(both the ALR-94 and on the AAMs). An AMRAAM shot can be made several ways- the F-22 can illuminate the target until impact, it(or a third party) can provide datalink info until the missile is close enough to go active, a third party can provide the guidance, it can be fired using HOJ, and it can be fired using information from the ALR-94. The -C7 AMRAAM is by no means a short ranged missile, and the -D will be even longer ranged.

    in reply to: Yet another F-35 thread #2394075
    wrightwing
    Participant

    that is all i read, i know that it has a 55 deg aoa like the fa-18 which is twice the f-16 at 27 deg
    it would be interesting to find out which one it is closer to, can you google it and let me know if there is more information

    Not even the F-18 can sustain 55 deg.

    in reply to: Yet another F-35 thread #2394078
    wrightwing
    Participant

    Which one, then? F-16 or F/A-18? There is a rather big gap between agilities of those two aircraft, you know.

    Either. It has greater sustained and instantaneous turn rates, and quicker acceleration, combined with greater post stall performance, longer range, and far more capable sensors.

    in reply to: Yet another F-35 thread #2394955
    wrightwing
    Participant

    I’m referring to loaded weight/SL wet thrust. Off the top of my head, ballpark figures:

    Rafale- 1.1 (much higher for 9t engine)
    Eurofighter- 1.21
    F-22- 1.23
    Gripen- 0.98 (much higher for NG)
    Super Hornet- ~1.0
    F-35- 0.85-1.0 region

    Now, as I said, the F-35 doesn’t have to carry weapons externally (well, unless it wants >4 missiles), so it has the benefit of “clean” drag- how draggy the airframe is may be another problem in itself. The Typhoon carries missiles semi-recessed- if you look how they are mounted they are held very close to the fuselage, almost like they are mounted conformally. And of course, it all varies greatly by mission, fuel, altitude, etc… so things are not set in stone/black and white so to speak, and these are very “ball-park” figures. Unfortunately, it seems the F-35 does have a bit of a weight problem- manifesting itself as a poor thrust/weight and poor wing loading. Decent FBW, unstable design, and low drag may be helpful in mitigating these issues to some extent, but we won’t be able to judge just yet, I don’t think.

    Also, in the event of a dog-fight where thrust/weight and wing loading are most useful, one would usually jettison the fuel tanks. That is my understanding at least, someone more knowledgeable is free to correct me on that.

    At combat weight, the F-35’s T/W is >1:1, and if it needs to get even lighter, it can dump 3,000lbs of fuel in 6-8 seconds(or use its afterburners to burn the fuel, to increase kinetic energy). You can’t go strictly by wing loading either, as that doesn’t account for body lift(i.e. the F-16 has a higher wing loading than an F-4 Phantom, but will fly a 360 deg turn by the time the F-4 flies 180 degrees).

    in reply to: Yet another F-35 thread #2394956
    wrightwing
    Participant

    You still do not grasp it, do you?! It is the drag versus thrust ratio at first to give the edge. The main drag is the frontal drag. The reason why most fighters look like long tubes at first to get the desired slenderness ratio.
    The weight is just one issue related to drag. To generate the lift to overcome the weight does cause drag. With FBW it is no longer the same handycap as it was before in the horizontal axis, when it gives a higher kinetic energy in the vertical axis at first.

    I do grasp it. I’m just disagreeing that the F-35 is as draggy as many assert.

    in reply to: MiG 29K #2395184
    wrightwing
    Participant

    Once they shove the 1000 T/R + module Zhuk-AE into any MiG, it’ll have no issue keeping up with the APG-79.

    And this would be based upon what information?

    in reply to: Yet another F-35 thread #2395219
    wrightwing
    Participant

    In a real combat mission, that were emptied first and released. 😉

    When I remember well, the F-111 was one of the last non stealth fighters designed with a limited weapons-bay and even that was used for extra fuel at first.
    When internal carriage is an advantage in general, we had seen such fighter designs for decades.

    Once they drop their weapons, they might have a great T/W ratio, but they’re unarmed at that point. It’s disengenuous to compare their clean T/W ratio with a loaded F-35. The F-35’s a lot lighter once it’s weapons have been dropped as well, and has used some of its fuel.

    in reply to: Yet another F-35 thread #2395253
    wrightwing
    Participant

    True. In any event, I was talking about the wrong graphs anyway, so I deleted my post. Still, I tend to take the slides with a grain of salt- an LM briefing isn’t exactly the most unbiased source (though the same could be said for any manufacturer), and there isn’t enough detail on the slides to make a good comparison. If it’s as accurate as their cost and scheduling estimates, well… I’ll just leave it at that. 😀

    Either way, despite having a poor thrust/weight, the F-35 does have the advantage of flying without external weapons, which of course cuts drag. Real world performance will be telling- it may be great, or it may be a lemon.

    What’s the thrust to weight ratio of the F-35’s competitors, when they’re carrying 5,500lbs of weapons, and external fuel tanks?

    in reply to: Yet another F-35 thread #2395346
    wrightwing
    Participant

    Not lies, but very misleading- there is no indication of what the scale of the graphs, nor, more importantly, the zero point from which they measured and the units on the acceleration (and lower is better- that’s rather unconventional). The charts are essentially useless- other than allowing us to order the aircraft by performance in an unspecified condition (clean/loaded?, amount of fuel?, etc…).

    If I ever tried to do this in a lab report back in my college days, I would have received a nasty mark-down and rightly so.

    I understand that, but for an unclassified briefing slide, you’re just not going to get that kind of detail. You’ll get a composite snap shot.

    in reply to: Yet another F-35 thread #2395349
    wrightwing
    Participant

    Every statistic or graphic without the basic numbers and source is a lie in general, because it could not be verified.
    LM has become infamous about data related to the F-35 program for all to see.

    I’m sure that there are charts with actual numbers, that are used in briefings not open to the public. While that doesn’t help us out any, it certainly doesn’t provide proof that the graphs are falsified.

    in reply to: Yet another F-35 thread #2395399
    wrightwing
    Participant

    Colorful pics, but they don’t contain any numbers to discuss,
    i.e fighter X accelerate this and that in Y seconds,
    in all likelyhood a clever idea/necessity from LM PR department…

    Why would there be a necessity for LM’s PR department? The graphs are a quick visual reference. Putting numbers in won’t change the outcomes, unless you’re suggesting that they’re outright lies.

    in reply to: Yet another F-35 thread #2395402
    wrightwing
    Participant

    This is it indeed the justification of stealth, so you won’t have to fight your way in.
    What i wonder is if it is wise to send manned a/c into the great unknown, the psychology, from pilot, commander to public, if a couple of strike packages get trapped and annihilated.

    There are unknown factors in any given mission, but you can rest assured, that no mission is planned where planes fly into an area, where there’s no info available.

    in reply to: MiG 29K #2395574
    wrightwing
    Participant

    I was curious about comparing 29K now in service with Russian and Indian navies, to its western contemporaries, mainly Supper Bug and Rafale. While in terms of the airframe, range , payload etc, K can hold its own.. its seams to me its biggest set back is in its nose. Zhuk-ME lacks behind RBE2 , and not to mention APG79. In terms of EW, K can not match up to SPECTRA or super bug (lets not bring growlers to discussion as its diferent class of aircraft).

    Now this got me thinking, Israelies have some brilliant kit that Uncle Sam will not allow them to tinker with on F16/15 like EL-2052. Not to mention that they are already using very capable EW suites on the aircraft above. So my hypotetical question is, how much more capable would K be if Israel/Rafael was given a chance to tinker with it. Could you equip EL2052 to K and still be able to use RVV-AE and other Russian weapons, in addition to ones from Israel?

    If Israel were given carte blanche to upgrade a Mig 29, it could be very capable. The problem I see though is that they’d probably be pretty picky about whose Migs that they upgraded.

Viewing 15 posts - 1,726 through 1,740 (of 3,666 total)