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KKM57P

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Viewing 15 posts - 181 through 195 (of 577 total)
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  • in reply to: Speedy Nimitz! #2031002
    KKM57P
    Participant

    The ship maximum efficient speed depend on the waterline hull length and is the max displacement speed

    in reply to: F-22 can Super Cruise for only 100 Nautical Miles #2441372
    KKM57P
    Participant

    Apples and orranges. You cannot compare a Mig-31 to a F-22A ,

    It’s senseless a MiG-31 is a flying sprit canister with a high fuel fraction of 41%.
    But less manoeuvrable and a huge IR-target.

    in reply to: F-22 can Super Cruise for only 100 Nautical Miles #2441378
    KKM57P
    Participant

    what is the typhoons supercruise range? im guessing its smaller?

    250NM on internal fuel only with with 6 MRAAM and 2 SRAAM but the EF have the higher fuel fraction.;)

    in reply to: F-22 can Super Cruise for only 100 Nautical Miles #2441383
    KKM57P
    Participant

    Not a problem unless the F-22 runs out of fuel or has some sort of (multi-redundant) system failure. The skin of the F-22 is cooled by fuel. This is an integral part of the F-22’s IR stealth, keeping the airframe significantly cooler thus reducing its IR signature.

    Coolig can prevent some IR-radiation but not all, it’s more usefull to use a paint that translated your surface IR-emission in uncomon IR-bands. You can make little against the stagnations temperature in the mach cone or you travel not so fast. The avonics, RADAR and air conditioning system cooled by fuel too. Specially the Radar overheating make some headaches.;)

    KKM57P
    Participant

    I understand that the modules can work in conjunction with one another depending on what they’re being used for, or that in the even of module failures, there is redundancy, or that in interleaved modes you can have multiple simultaneous A/A, A/G, comms/datalink, EA, etc.. occurring.

    Multipile beams are formed with high speed beamsteering and high frequencies agilty whitout the degneration of your antenna gain and resolution! Against this spliting your T/R in groups degrade antenna gain, resoultion, increase side lobes and widen your beam. A very dumb idea!;)

    KKM57P
    Participant

    I think we’re arguing semantics-

    But you have no clue about an AESA or PESA works!:D

    http://www.radartutorial.eu/06.antennas/an14.en.html

    KKM57P
    Participant

    Sorry dude, but my “proofs” are not online..so well you can claim i’m lying through the internet wisdom

    Signal Processing for Airborne Bistatic Radar
    Kian Pin Ong doctore thesis.

    Page 6. why AESA are tilded back.

    KKM57P
    Participant

    But BAE produce this for the miltary sector and for the civil market.:diablo:

    http://www.heise.de/newsticker/Tapete-haelt-WLAN-Ausspaeher-draussen–/meldung/50080

    The last passage about the milatary use of FSS in RADAR-Radoms.

    KKM57P
    Participant

    Each module on an AESA array is an antenna though, and can operate independantly from the rest, in terms of modes, freqs, power settings, etc..

    Wrong, one AESA-modul make no beam steering and make no antenna gain.
    Only the cooperation of some modules make beam steering posible and this is strict phase and frequency-dependent. Or your AESA squints and illuminated all and nothing. :dev2:

    KKM57P
    Participant

    PESA can do exacly the same, and nobody is claiming they are using such technic,you are talking as it is an intented feature, as if the whole AESA plate is covered with antennas (which , is not)

    For that you should need other more exotic techniques, as plasma, BTW the AESA radomes are not tilted back because “RCS requirements”…

    Neither AESA nor PESA absorb Radar waves, the are tilted back for RCS reasons, this scatters incoming Radar waves away from the front quadrant .:rolleyes:
    Radoms are black magic, with pin diods can you some Radom switch opaque or transparent. The magic is not only AESA. 😉

    KKM57P
    Participant

    But the Kongsberg fit not in the F-35B bay?

    in reply to: Eurofighter Typhoon news II #2450468
    KKM57P
    Participant

    Oh no. If the Brits do go ahead with that, they will pay a healthy part of the German Tranche 3B deliveries, as the will have to compensate. Saving money for the Luftwaffe and getting the planes will make Mrs. Merkel happy.

    and make EADS and Alania happy too, BAE loses then working share.

    KKM57P
    Participant

    Sorry, you are making great assumptions…………The F-35 just like the F-22 is very aerodynamic. Appearance means nothing…….:eek:

    As a matter of fact the Raptor could likely exceed those numbers. If, it didn’t have fixed inlets and it wouldn’t damage is Stealth Coatings.

    The limit is the pu matrix of your RAM and the composit leading edge on your F-22. Beyond Mach 2 need your Raptor many maintenance after this flight. Then is your Raptor and F-35 with a after burner in use not stealth. First through the stagnation temperature in the mach cone (unavoidable) and through the high IR emission and the Radar reflective ionised jet blast. (Or you need very expensiv A50 ) Then should we not forget the cooling problem on such high speed and the F-22 Radar cooling problem etc. etc. Then should we not forget the big CO2 footprint of this big fuel guzzlers and QWIPs detectors which can detect CO2 on far distance (Now only the good guys have this but within 5 years maybe the bad guys too). The use of MTD instead of MTI.

    KKM57P
    Participant

    Supersonic is when all air flow is supersonic and this is above Mach ~1.2!:diablo:

    KKM57P
    Participant

    Remember, the “Drag” and “Weight” of External Fuel Tanks is so great. That it consumes half the fuel just to carry them…………….So, unless you have some magical evidence that Typhoon External Fuel Tanks are some how drastically more efficient than other tanks from all around the world. I see no advantage compared to 5th Generation Types.

    Area Rule and the use of shock bodys. More can in the transonic and super sonic area some times better and the Typhoon use it’s extern store as shock bodys.
    After droping a drop tank decrase the CwA value but a F-35 stay always boxy and fat and have alway it’s drag penalty even when carry nothing.

    Why not only one high speed run with the F-35 as yet after 2 years flight test?

    Then should we not forget! To much mass concentration in the centere line make many headaches –>Inertia coupling!!!!

Viewing 15 posts - 181 through 195 (of 577 total)