dark light

Amiga500

Forum Replies Created

Viewing 15 posts - 541 through 555 (of 2,151 total)
  • Author
    Posts
  • in reply to: Saab Gripen & Gripen NG thread #3 #2231958
    Amiga500
    Participant

    So I’d say that the IRST-system does give passive BVR-capabilities even against “stealth” targets as per advertised.

    If it is good enough or not is likely depending on missile performance and weather.

    Adding jamming to the equation it is even likely that the IRST systems will become the primary sensors.

    You got it in the 2nd sentence. IRST is highly weather dependent.

    But, contrary to that, I’d wager that IRST is already the primary sensor now. “LPI” radar is a myth.

    in reply to: Saab Gripen & Gripen NG thread #3 #2231989
    Amiga500
    Participant

    Meh. Its more manufacturer claims.

    I dismiss Lockheed’s as largely BS, and I do the same here (or if it were Sukhoi).

    [Although, I must admit, Saab have a track record of delivering what they promised when they promised it for the cost they promised it. Lockheed have a track record of not delivering what they promised years after they promised it and at multiples of the promised cost. Its harder to say with Sukhoi given the funding collapse of the 90s, but I do remember the original T-10 was a real dog’s dinner.]

    in reply to: Saab Gripen & Gripen NG thread #3 #2232976
    Amiga500
    Participant

    Interestingly Flight has not (yet) corrected the 3t number — previously I have seen they have been very quick at correcting errors.

    Which makes me wonder; if this number is real (and it seems to be) what is included in that 3t number ? The F414 weighs around 1t AFAIK.

    Probably empty airframe.

    By empty I mean EMPTY. No systems, no actuators, no engine, nothing. Just structure and aerodynamic surfaces.

    in reply to: BAE Replica movie #2233025
    Amiga500
    Participant

    I think the size of the model might not have been fully apparent before, but it certainly isn’t small.

    The two-seat cockpit makes it look small.

    in reply to: BAE Replica movie #2233028
    Amiga500
    Participant

    According to me last Physic Evaluation… Yes.

    Oh… last time the nice guy in the white coat gave me a certificate to say I wasn’t….

    Indeed the French were, and still are, completely right with Rafale. Just as are the UK are with Typhoon.

    Nah, Typhoon is… not a mistake… but not quite what it should have been.

    Way back when, early ’80s, the UK didn’t require a Carrier Capable fast jet and lets be fair here, as much as the MoD are pretty clueless anyways, it’s fair to say that even during the time of discussing capabilities and requirements during the Blue Prints stage it’s a little difficult for them to think about QE2 and the F-35 would be thought up then, simply because they weren’t even heard of then.

    The carrier capability always existed in one form or another. In the early 80s, the MoD should have been more aware than pretty much any other nation on earth of the value of carrier operations.

    For them to then exclude potential carrier operations from the baseline design requirements was idiotic.

    Does the Rafale cost much (any?) more than Eurofighter? If not, then what exactly did the MoD save by not specifying carrier requirements?

    There is a smart way to draw up requirements, anything that comes with a good flexibility:performance:cost ratio, a good benefit:performance:cost ratio goes in.

    The MoD completely screwed that up. Run by accountants who could only see it might cost X + Y% to have the potential for carrier ops in the airframe, as opposed to the engineer who would see it might cost X + YY% to try and incorporate it later and also opposed to the guys in the field who would see it might cost X + YYYYY% to not have the capability.

    Which aircraft are you thinking about there, exactly?

    How did Eurofighter fare in Afghanistan? It muddled along with limited ad-hoc capability added.

    Your point being?

    The oft-touted reasons for ECA separation were not irreconcilable.

    That little sentence there doesn’t resolve anything now, does it.

    Nope. Doesn’t sort anything now. Pity the “bright sparks” in charge then weren’t bright enough to realise the second half of that…

    Just out of curiosity since you mention the Mirage, ever heard of a Fairey Delta 2?…

    The supersonic experimental? Apples and oranges.

    in reply to: The PAK-FA News, Pics & Debate Thread XXIV #2233329
    Amiga500
    Participant

    Theoratically, a full 3D nozzle could also provide roll control at post stall. However I haven’t see OVT practicing it.

    Any 2D TVC that isn’t close coupled and can be differentially controlled can do that though….

    Kinda like so:

    Su-37
    http://vayu-sena.tripod.com/vidcaps/su37-1_tvc_mpg_t3.jpg

    Su-30 MKI
    http://vayu-sena.tripod.com/pix/su30mki14.jpg

    OK, it’ll not be a perfect “roll” manoeuvre, but it’ll get the job done.

    in reply to: The PAK-FA News, Pics & Debate Thread XXIV #2233339
    Amiga500
    Participant

    That OVT has only been tested on one or two prototypes and was deemed ineffective for such a complex design feature of the engine/nozzles.

    This is a no brainer really.. The insignificant weight gain of the current 3D nozzles comes With a Whole range of added advantages

    That. 🙂

    in reply to: The PAK-FA News, Pics & Debate Thread XXIV #2233341
    Amiga500
    Participant

    The Current 3D(yes it is 3D!) TVC of Su-35S and Pak-Fa is the best solution out there, world wide.

    I’m calling it 2.5D as its a little handier than saying “3D but with 2 discrete vector planes only”….

    in reply to: The PAK-FA News, Pics & Debate Thread XXIV #2233433
    Amiga500
    Participant

    No. It is “2.5D” not 3D.

    Here is a few questions to ponder:

    – Is 2.5D lighter?
    – Is 2.5D substantially cheaper?
    – Does 2.5D improve nozzle propulsive efficiency at a nominal vector?
    – Does 2.5D vector further in its discrete directions than 3D in any direction?
    – Has typical use patterns indicated that 2.5D will give you the desired pitch/yaw effect in, say, 95% of cases as compared to 3D?

    Having a 2.5D system compared to full 3D is not necessarily a disadvantage.

    Amiga500
    Participant

    These guys say there is not a way to hide costs because that is what they do — make sure contractors don’t cheat. And they pay whistleblowers handsomely.
    http://www.dcaa.mil/

    Of course they do…

    When is the last time you told someone you weren’t capable of doing your job?

    Amiga500
    Participant

    After the N-M breach, Lockheed Martin’s profit on the F-35 development and LRIP was cut from 7-8% down to about 2%.

    hahahahahaha.

    You aren’t that naive. There are countless ways to bury profits from any particular program.

    in reply to: F-35 News, Multimedia & Discussion thread (2) #2233796
    Amiga500
    Participant

    http://www.defense-aerospace.com/article-view/release/152337/recent-public-statements-strain-credibility-of-f_35-program-chief.html

    F-35 supporters and F-35 detractors, make of that what you will.

    It was a relatively poor piece with questionable data to back it up, both in favour and against the F-35.

    Using “he once said”/”she once said” as a basis for an argument is somewhat stupid.

    If you don’t change your opinion in the face of solid data then your a bigger idiot. Whether Bogdan has that data, or whether that data is reliable, or that prediction is accurate are different matters.

    in reply to: RAF AWACS to monitor Ukraine Border #2233895
    Amiga500
    Participant

    Well… I’m pretty lost for words on this development…

    I’m sure the Ukrainians will sleep well knowing they are safe with “monitoring” going on.

    Meanwhile in Moscow Putin wets himself laughing.

    in reply to: F-35 News, Multimedia & Discussion thread (2) #2233896
    Amiga500
    Participant

    Nah..the so-called “fightermafia” advocates designs optimized for A2A, light in order to achieve maneuverability,
    not laden down with bomb-trucking accessories while not on a bomb-truck mission.

    No, no, Herp is right…

    The original Fighter Mafia, those of Ricconi, Boyd, Sprey etc demanded a low weight, no-frills machine which emphasised heavily on energy maneuverability and little else.

    For instance, they thought the original F-15 was too cumbersome and complex for the task and pursued LWF (later F-16).

    Now, I guess the top brass within the USAF is a little different, there will still be a few with the opinion of not a pound for A2G, but this would not be as stringent as back in the day.

    But the US armed forces have much, much deeper problems than a few eccentric generals/admirals. Their procurement is a joke, and while much of the fault must reside within the armed forces themselves, a large and not at all insignificant part must also reside with Congress and the relationship between the two.

    Amiga500
    Participant

    If you outsource the entire planning and production cycles.

    You’ll end up with nothing but half built* FE models and CFD mesh….

    *and what is done has most likely been done wrong.

    [Never mind actually building a product. Outsourcing has its place, but definitely not as extensively as it has been used in the last decade or so.]

Viewing 15 posts - 541 through 555 (of 2,151 total)