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KKM57P

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Viewing 15 posts - 16 through 30 (of 577 total)
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  • in reply to: News report: UAV-airliner near miss #493917
    KKM57P
    Participant
    in reply to: Missing Malaysian Airlines B777 #494094
    KKM57P
    Participant

    But where cotain an LIon accu arsenic? The contain LiCO2 and a water free electrolyte or a polymere (the PO in LIPO). A burnig LiOn or LIPO produce a huge amount of white fume. Then 2t LIon accus must be storaged in a special container. LiOn or LIPOs transported with storage voltage equal to 20% up to 40% energy content. For a simple reason, new LIons contain an inhibitor. This inhibitor make LIon storable over long time and full load storage would harm the accus anyway. The killer is the electrolyte or polymere. LiPF6, Polyvinylidenfluorid (PVDF) or Polyvinylidenfluorid-Hexafluorpropen (PVDF-HFP),Li3PO4N Lithiumphosphatnitrid.
    The all produce HF during the combustion process and the endproduct with atmospheric humidity is then fluoric acid. But HF produce an eye-stinging smell.

    in reply to: comparison of combat jet engines #2251761
    KKM57P
    Participant

    You may be right. I was under the impression that the inlet on the EJ200 was 33″, but according to most sources it is the same as the RB.199 at 29″. The length of the EJ200 appears to be nearly a foot longer than the RB.199. While that might seem like the Tornado would need to be altered to use the EJ200, apparently the EJ200 was designed as the RB.199 replacement IN the Tornado before it made its way into the Eurofighter. If that is the case then it must not take too much to fit these longer engines in the Tornado.

    http://www.flightglobal.com/FlightPDFArchive/1992/1992%20-%201610.PDF

    in reply to: The jet propulsion with closed combustion type #2300224
    KKM57P
    Participant

    You know that Rolls Rocye has made similar work and patented this?
    http://www.patent-de.com/20080417/DE19600679B4.html

    Similar work NASA-Report Nr. TM X-71906 „Preliminary Evaluation of a Turbine/Rotarg Combustion Compound Engine for a Subsonic Transport”

    KKM57P
    Participant

    The aft-tail aircraft can probably be the most ‘stealthy’ with the least compromise from near-optimum placement of control surfaces, which would most significantly affect the delta-canard.”

    Not really, a conventional tail with a single vertical stabiliser is a stealth nigthmare. It’s act like a a cat eye reflector. The best choice for stealth is a clean Delta with a stacked vertical stabiliser and some continuous curvature. DERA is USA.;)

    in reply to: Rafale's RBE2 AESA pic and news! #2339385
    KKM57P
    Participant

    What about Germany, Italy and spain ?

    Germany
    Eurofighter über dem Baltikum
    http://www.baltische-rundschau.eu/2009/09/23/eurofighter-ber-dem-baltikum/

    The Taliban Airforce is may be to powerfully.:diablo:
    Can the Rafale now drop laser guided bombs alone or need the assistance of theirs granddad for illumination?

    in reply to: Rafale's RBE2 AESA pic and news! #2339699
    KKM57P
    Participant

    10% increasein range means a 40% increase in output power. That’s why the electrical system has to be redesigned, it has little to do with the engines.

    10% more range is in fact 20% more range. Your Radar impuls must go to the target and from the target back to the Radar. You need twice the power for 10 % more Radar range.

    in reply to: Rafale's RBE2 AESA pic and news! #2339750
    KKM57P
    Participant

    @Kovy,
    this was discussed in an article where a French colonel was talking about such issues. It was stated that the Arabs demanded a GMTI/T mode and more interleaving between modes and that they didn’t want to fall back wrt detection range in comparison to the F-16 blk 60’s APG-80. It was stated that a 10% increase in range is desired.

    10% sound not much but mean the need 3dB more systemgain or 100% more power.:rolleyes:

    in reply to: Rafale's RBE2 AESA pic and news! #2339753
    KKM57P
    Participant

    Gentlemen, I doubt the mockup shown above is the 1064 TRM antenna. Anyways, the placard clearly states that it has a diameter of 688mm and a head on detection range of 160km range for a 3msq target.

    You can zoom on it here:

    https://picasaweb.google.com/110614958773855914651/AeroIndia2011#5571669691433921218

    USS

    Counting on the front may be failed when this is a coarsed grid!;)

    in reply to: Sea Gripen or Sea Typhoon? #2340176
    KKM57P
    Participant

    Personally, I think it is a game changer, before Eurofighter wheeled out the Sea Typhoon at Aero India, the last we heard about Sea Typhoon was that it simply was not possible due to the canards blocking the pilots view in landings.

    Do you ever seen a Typhoon or other Jet making a sideslip at a carrierer approach? With such a logic is a F-18 not carrier suitable the LEX blocking the pilots view in landings. :rolleyes:

    in reply to: Sea Gripen or Sea Typhoon? #2340916
    KKM57P
    Participant
    in reply to: comparison of combat jet engines #2380763
    KKM57P
    Participant

    The awesome performance of Pratt&Whitney’s engine makes the other two look like toys.

    Particularly at the weight.
    The two last rows are mixed up in the list and est mean all and nothing.
    With a bypass ratio of 0.57 is the F-135 sure not supercruise capable.
    A good engine for an attacker but not really for a figther.

    KKM57P
    Participant

    I think more on MTU and ther Blisk and friction welding technology.;)
    Sure RR is licensee, but in the USA P&W, GE and other.:rolleyes:

    KKM57P
    Participant

    Sure, therefore need the US industrie european licenses for the internas for this engines. :rolleyes:

    in reply to: Supercruise #2413280
    KKM57P
    Participant

    Lambda set a narow border for ignition, burn speed, efficiency therefor is the fuel burnrate a function of the RPM, Airspeed and therefor a function of the volumetric flow rate!;)

    Compressor stalling and pumping (flux reversion) are unusual working conditions of an axial compressor.:diablo:

    Then speak we about leaking jet engines (low by bypass jet engines) with augmentor and not about vintage “Turbo”-jet engines with afterburner.;)

Viewing 15 posts - 16 through 30 (of 577 total)