dark light

KKM57P

Forum Replies Created

Viewing 15 posts - 136 through 150 (of 577 total)
  • Author
    Posts
  • KKM57P
    Participant

    L
    I bet you also didn’t know that Mig31 pilots wore radiation meters in their flying suits, due the immense power of N007 radar and so each crew was limited to monthly/yearly radiation allowance and therefore limited in flight hours by radar.

    More a X-ray problem and not a power problem. The hv-switch tubes emit x-rays.

    in reply to: Hot Dog Typhoon thread III #2414695
    KKM57P
    Participant
    in reply to: Hot Dog Typhoon thread III #2416142
    KKM57P
    Participant

    EXCLUSIVE: Countdown to the AESA radar of Eurofighter

    http://translate.google.de/translate?u=http%3A%2F%2Fwww.hellenicdefense.gr%2Feidiseis%2Fe2009%2Fe091218b.html&sl=el&tl=en&hl=&ie=UTF-8
    EXCLUSIVE: Countdown to the AESA radar of Eurofighter

    In March 2010 will complete the study for the installation of radar active devices scanned (AESA) in the Eurofighter Typhoon, a mechanism for repositioning (repositioner) antenna for greater coverage…

    in reply to: Hot Dog Typhoon thread III #2424481
    KKM57P
    Participant
    in reply to: 36 Dassault Rafale for Brasil – Official #2414590
    KKM57P
    Participant

    and you you have all the details in gripen aerodynamics probably…
    its stated.
    a RM12 gripen with 1 DT and with AirtoAir will do 1.1M supercruise and a f414 one do >1.2M with the same ordinance.

    And shown this only in PR claims!:diablo:

    in reply to: 36 Dassault Rafale for Brasil – Official #2415987
    KKM57P
    Participant

    All gripen versions have been supercruised with AA and 1 DT(A/C 1.1M only thou) …

    BS the sweet spot for drag is at 1.2 Mach why can’t the Gripen reach not this 1.2M? Supercruising only at M1.1 is an evidence of incapacity it’s not really supersonic.;)

    in reply to: Hot Dog Typhoon thread III #2441678
    KKM57P
    Participant

    I suppose “free floating” canards on Mirage 2000 (because of no such devices, the effect is the same) makes it statically stable too, isn’t it ?
    The problem is that this aircraft is known to be statically instable from day one. Is everybody lying or is it only you ?

    I suggest
    http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19620006296_1962006296.pdf
    The difference between a non existent, fixed and floating Canard is a total different Cp. Whit a freefloatend canard move the Cp forwards.

    http://goliath.ecnext.com/coms2/gi_0199-3509733/Gripen-lion-of-the-sky.html

    If the entire digital FCS crashes, the Gripen can fly home with free-floating canards and an analog back-up system.

    in reply to: Hot Dog Typhoon thread III #2441821
    KKM57P
    Participant

    .
    There’s one problem here, though. You can’t trim free floating canard, because it’s self trimmed by definition, so I guess in free floating mode, the canard would offset itself to generally (negative?-KKM here says positive?) range, in which it will “float”.

    A freefloating Canard disappears aerodynamical for the static margin is’t existent.

    in reply to: Hot Dog Typhoon thread III #2441823
    KKM57P
    Participant

    .
    There’s one problem here, though. You can’t trim free floating canard, because it’s self trimmed by definition, so I guess in free floating mode, the canard would offset itself to generally (negative?-KKM here says positive?) range, in which it will “float”.

    A freefloating Canard disappears aerodynamical for the static margin isn’t existent.

    in reply to: Hot Dog Typhoon thread III #2441831
    KKM57P
    Participant

    No, it is not. Neither is the Mirage 2000 (both being moderately unstable).
    The point of the free floating canards is to remain flyable in case of battle damages on control surfaces (including one or both canards).

    and is flyable without the help of a FCS and sometimes happen in early days of the Rafale FBW-System occasionally.

    Postiv static margin is aerodynamical stable .
    Negativ static margin is aerodynamical anstable .

    http://adamone.rchomepage.com/cg_calc.htm

    A freefloating canard make a Rafale or Gripen static stable in the pitch and make it capable to limp home in subsonic.

    in reply to: Hot Dog Typhoon thread III #2442145
    KKM57P
    Participant

    The use of percentage of MAC to express both neutral point location and static margin.

    in reply to: Hot Dog Typhoon thread III #2442160
    KKM57P
    Participant

    A short coupled canard has a moderat negativ MAC, with a free floatend canard is that moderat positiv. A long coupled canard with free floatend canard is not flyable.

    in reply to: Hot Dog Typhoon thread III #2442170
    KKM57P
    Participant

    Hm, true.
    However, this may be after touchdown or something, because by seeing canard’s chord, I’d say it’s stalled at this alpha…dunno, though.
    But, if this is true, then the airflow from canard would actually reduce wing’s lift, instead of increasing it.
    Is it possible that Dassault engineers oversaw that?

    No, the Dassault engineers know that. But a short coupled canard has the advantage of the possibylity of a free floatend canard. That mean you can fly a Rafale without FCS direct over a analog direct link, with a free floatend canard .

    in reply to: Hot Dog Typhoon thread III #2442174
    KKM57P
    Participant

    Rafale on USS John C. Stennis make a touch an go with high canard deflection and the badest thing the ailerons points upwards and produce downforce.
    A Rafale bleed more energy on tight turns, has more trim drag etc.

    in reply to: Hot Dog Typhoon thread III #2442370
    KKM57P
    Participant

    To which aircrfaft?

    It is also well known that integrated canards also provides with increased airflow dynamic over the wing (and fuselage/fin)at lower speeds and higher AoA, responding to STOL requierements.

    This is only right for 0° deflection for a short coupled canard.
    With pitch up the short coupeld canard degrade your main wing lift and direction stabilty through the redirection of the airstream under the main wing.
    High canard CLmax leads to low efficiency, e, and high e leads to low CLmax. Generally have a small moment arm to VT, requiring larger area.

    Then for what has the Typhoon between wing and canard strakes? 😉

Viewing 15 posts - 136 through 150 (of 577 total)