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  • in reply to: Cancelling the F-35C ? #2012042
    over G
    Participant

    Nope Cola, now you are confused about the helicopters πŸ™‚

    Anyway, when is programed the 35C’s first flight? or was done already?

    I think in this case Occam’s Razor could be taken to heart

    How can you apply the Occam’s Razor if you don’t even have any understanding on what you are talking about?

    in reply to: Cancelling the F-35C ? #2012049
    over G
    Participant

    Actually, this isn’t a mistake…However, it’s easy to confuse terminology.
    The air of -56Β°C at tropopause builds up the temperature on the supersonic aircraft’s skin a few times over ambient temperature (by energy transmission) and would eventually melt/destroy the aircraft’s skin at higher supersonic numbers due extreme pressure.
    The exhaust temperature isn’t a problem here, but the total amount of thrust produced by the fan and a pressure it generates, which will soften and eventually destroy the deck.

    Many people here think that a fan works as the helicopter’s lift blades…”what? a fan?, tsss, is just cold air, it will do nothing” πŸ™‚

    in reply to: Cancelling the F-35C ? #2012257
    over G
    Participant

    Aside the conceptual mistakes and simpleton thinking (like a shinning exhaust is transferring more energy by default)

    This is what wikipedia says about the fan and thrust distribution.

    The STOVL variant, F135-PW-600, delivers the same 43,000 lbf (191 kN) of wet thrust as the other types in its conventional configuration. In STOVL configuration, the engine produces 18,000 lbf (80.1 kN) of lift thrust. Combined with thrust from the LiftFan (20,000 lbf/89.0 kN) and two roll posts (1,950 lbf/8.67 kN each)

    So are basically are half and half.

    Anyway, i have not seen any test or proof on this “deck melting” issue, but the problem (if exist) is intrinsically related with the plane, as i said, is heavier, so will need more energy.

    in reply to: Cancelling the F-35C ? #2012265
    over G
    Participant

    They are testing the F-35C, and soon they will be testing it with air under the wheels too. Have patience:
    http://www.jsf.mil/gallery/gal_photo_sdd_f35ctest.htm

    I remember seeing Mr Sprey on a documentary a few years ago stating that the Harrier familt of aircraft was the most disasterous, useless and dangerous military aircraft ever produced. He said everyone would be better off buying ctol supersonic interceptors instead. Argentina followed his advice prior to 82. The RN disagreed with him. Guess who won? If that man told me it was a sunny day I would get my umberella out. πŸ˜‰

    Well, the harrier is the worst thing you can have for air defense , poor height, poor speed, etc..

    I don’t know how good did it, but, the argentines were concentrated into sinking the RN ships, and not into air superiority, something in which the harrier is awful.

    They had sinked a lot of RN ships, if had not been by their poor hardware’s maintenance (bombs and ordnance), probably they had won the war.

    He said everyone would be better off buying ctol supersonic interceptors instead

    For that time, i think he was right (but then there was a requirement for carriers), and probably he was with the idea that all the airwings should be directed by the Navy, and the av-8 for the marines was senseless…if he had that idea, he was probably right.

    The F35B is other beast, it have a lot more potential than the Harrier.

    in reply to: Cancelling the F-35C ? #2012271
    over G
    Participant

    not the F-35C, but rather cancel the 35A and get the air force to use the Cs.

    This would be the dumbest idea ever

    Why the Navy is not testing the 35C? can somebody explain it?

    in reply to: Cancelling the F-35C ? #2012275
    over G
    Participant

    heat of the lift fan exhaust

    heat is not temperature, is energy

    BTW, you can output low pressure, and create a huge heat sump when the air hits the ground πŸ™‚

    in reply to: Cancelling the F-35C ? #2012278
    over G
    Participant

    Cooler than the air coming out of the lift fan? Are you seriously claiming that the output of a jet engine is cooler than air speeded up by that lift fan?

    And since when has the exhaust temperature of a jet been proportional to the size of the aircraft it powers? I think you’ll find there’s a lot more to it than that.

    Are you talking about temperature or energy?

    Both are different things.

    You can have high temperature, but low energy transference

    You can have low temperature and higher energy transference

    The thing that counts for the deformation is mainly the energy transference

    ————

    The article, ok

    the article might be right

    You are wrong, by the concepts

    in reply to: Cancelling the F-35C ? #2012284
    over G
    Participant

    Yes, but –

    What – hotter & causing more fatigue than a jet exhaust? That’s the claim made by the article. It claims that the air coming out of the lift fan melts decks that the exhaust of a Harrier (see above) does not.

    You don’t see this as a energy transference issue, you are just watching the flare/temperature, thinking that by default it does have more energy

    You are not taking the flow into the bill

    in reply to: Cancelling the F-35C ? #2012286
    over G
    Participant

    The harrier exhaust is cooler , because the harrier is smaller.

    That’s all

    That’s all the big problem

    in reply to: Cancelling the F-35C ? #2012290
    over G
    Participant

    Yes, the lift fan itself just blows cold air, but it only provides about a third of the lift in vertical mode, the rest coming from the engine exhaust – directed downwards by the swivelling nozzle – which is very hot. The lift fan is of course driven by a shaft from the main engine.

    Any pics/videos of the F-35 hovering over any surface other than concrete?

    That’s just typical of the quality of their “facts”. The lift fan doesn’t even have any combustion going on and is very cool compared to the engine exhaust.

    You guys have no idea, all the huge air flow at that high velocity creates heat and increase the temperature over the ground, as well as creating structural fatigue, have you ever seen an industrial fan? (a big one, for industrial -metal melting/heating- ovens)

    ****

    I find the extended use of idiot and imbecile names for people who are not here as disturbing. Calm down or watch me use the names for every F-35 fan in the vicinity.

    If you cannot stand different opinion, please, lock yourself into your basement for the rest of your lives, you will do this world a service. Thanks.

    I agree

    ****

    There is not 35C prototype yet (i think), what are they waiting for?

    in reply to: Question. Flares (countermeasures). #2425632
    over G
    Participant

    There are videos of that igla missile hitting targets launching flares.

    Did it prevent the su-27 or f-22 to carry flares? did the flares became obsolete?, no.

    There are different generations of hardware, flares included.

    BTW, modern flares seems to be a bit more smoky than older ones (or it’s just me), wonder if smoke has also a function for IR countermeasures…

    DIRCM is a laser based system, medium-high powered lasers, in general, can’t change their frequency, although with the use of special lens they could, but is one lens per frequency, so is not very practical for a wide arrange of wavelengths, while IR seekers have the potential to detect and track more frequencies.

    The deal with DIRCM compared with IRCM is that they concentrate all the energy on the threat, so they are more effective to “blind” it, but then, normal IRCM systems operate with a wider specter arrange.

    Saturation can be countered with polarization, as well.

    Wonder if there are towed IRCM’s, IMO this would be more effective.

    in reply to: Stealth, what is it worth? #2425646
    over G
    Participant

    yes or no

    Consider a single beam of EM radiation, say light to make things simple. We pass this bea………………………………………………………………………..on. Don’t forget to consider both ‘mathematical models’ when considering aspects of light’s reality.

    Whatever, look, you are right, ok?, i won’t continue this

    in reply to: Stealth, what is it worth? #2426104
    over G
    Participant

    and can tell you that EM waves can be cancelled and the diffraction you are talking about would be below the noise floor

    You can’t, i don’t know if you have BSc in physics, you just can’t.

    What you get is interference , that’s all. (interference is a pattern of cancellation/adding, but you can’t really cancel a EM wave)

    When a photon born, you can’t cancel it, you could do it before it born, which is not possible for practical systems.

    Even if you could set a electric potential field in which you could cancel the photon, what the emitter gets is a overcharge, because what you are doing basically is to keep the energy inside the emitter.

    Please, answer me the question, 2 lasers, 180ΒΊ out of phase, will they cancel each other? just answer, yes or no.

    The L-band experiments aren’t specifically aimed at stealth targets. But surely they do work on them too. Actually they are more efficient against these VLO planes because of the limitations of X-band systems there.

    Magazines and PR people are selling those prospected L-band AESAs as a stealth-counter

    I agree

    in reply to: The PAK-FA Saga Episode X #2426394
    over G
    Participant

    If they manage to fit 8 missiles in the airframe, i can only imagine that they are stuffing 4 of these berkut’s cells 2 at side, 2 on tandem, leaving the engines separated, and since they can’t really do the S-duct thingy, they would cover the engines with some sort of cones…(the variable inlet).

    My wild speculation…

    in reply to: Stealth, what is it worth? #2426566
    over G
    Participant

    Sign, you are over-using terms like signal processing, signal data pattern, cryptical form, i can understand why you use these terms, everybody does..sound cool, but actually means nothing, i’m not criticizing you, is just that…everybody use these terms so lightly….

    Aspis, ECM forcing fighters to merge are old news, very old, way older than stealth, way older than the 22/117/have blue, etc…., is why people like Riccioni hated the ATF concepts , and the relying on magical-lazy BVR fighting, garbage that was popular in the popular media in the 80’s-90’s and still now, is the real deal, is the real fighting, the dirty job, is not the “stealth counter”, not the magical tactic against the F22…again, the stealth hysteria is showing.

    pfem, you are a kid, i won’t bother with your nationalist trash.

Viewing 15 posts - 451 through 465 (of 1,640 total)