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kilcoo316

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Viewing 15 posts - 406 through 420 (of 721 total)
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  • in reply to: what is the big deal about the Rafale #2513828
    kilcoo316
    Participant

    About the only thing I would think the EF2000 has over the Rafale is the EJ200 may be a slightly stronger engine than the Snecma M88-2.

    The Rafale has a much closer coupling of the canard to the wing, while this may make the L/D slightly less efficient in cruise with the lift distribution variation on the main wing, the vortices given off at higher AoAs should give a slightly better higher alpha performance. Against that, the canards on the EF should have slightly more pitch authority by dint of their longer distance from the cg position.

    in reply to: F-18 and drag shute #2514306
    kilcoo316
    Participant

    Drag chutes pose a significant maintenance and logistics burden. They can only be used 7-10 times before they have to be replaced (they fray badly from being dragged on the runway surface). Cost to replace is $50+K. A parachute takes time to be inspected and repacked with a 20+ man parachute shop performing that task.

    😮 😮 😮

    Is that only for the F-117???

    Christ, I’d like to think I could design a cheaper to operate system than that right now!

    in reply to: Saudi Eurofighters under threat? #2516927
    kilcoo316
    Participant

    they have absolutely nothing to fear from West. there only fear is that 1 billion muslims who are blindly following there ideology will stop believing the nonsense that they represents.

    No, you misunderstand the context. We both mean fear in terms of findings of any inquiry.

    in reply to: Saudi Eurofighters under threat? #2517012
    kilcoo316
    Participant

    C’mon it’s common knowledge they have everything to fear.

    There are no bigger hypocrites.

    Nic

    I know that – yet on what reasonable basis can they demand the investigation be halted?

    Diplomatic threats should not be allowed to halt the investigation – indeed, they should only provide further impetus for the investigation.

    in reply to: Russian planes #2517043
    kilcoo316
    Participant

    :rolleyes: Not again..

    A Ferrari F1 can outperform Renault. And vice versa.. And guess what, sometimes even McLarens win the race.. It all depends on the pilot and conditions.

    McLaren? Not this year anyway :diablo:

    Anyway, I think the accounts came from Greek airforce pilots who have access to both :confused:

    in reply to: AWACS Type Aircraft in Danger? #2517049
    kilcoo316
    Participant

    Wait a minute…If the A 50 can detect stealth targets (my “educated assumption” is that it can’t, but let suppose so) that radar must work in longer waves. If so, how would such a radar detect a missile??? It shoud work in higher frequencies for that. But, in this case, it wouldn’t detect a stealth A/C… :confused:

    Uhm, the wavelength will not matter for missile detection or not. It will matter for localisation.

    Besides, whats to stop the A50 routinely changing wavelengths?

    in reply to: Saudi Eurofighters under threat? #2517057
    kilcoo316
    Participant

    Going back to the original post –

    Question: If the Saudi’s have nothing to fear, why block the investigation?

    Answer: ….

    in reply to: Russian planes #2517064
    kilcoo316
    Participant

    Mig23MLD is even more biased towards the russian birds than I am towards the Mirage 2000 and the Rafale… or is he?

    Nic

    Well… I’ve seen on here or elsewhere a M2000 can out-dogfight an F-16.

    in reply to: Question about the MiG-29 #2517511
    kilcoo316
    Participant

    Where are the undercarriage doors?

    in reply to: New French-Israeli incident in Lebanon #2517696
    kilcoo316
    Participant

    Let me explain what’s happening here: The IDF is preparing for another war with Hezbollah. I know some here have trouble figuring it out, but UNIFIL’s job is actually supposed to be to disarm Hezbollah, assist the Lebanese Army in anti-Hezbollah operations and prevent Hezbollah from re-arming and rebuilding its infrastructure. None of this is happening, instead the French and others in UNIFIL are turning a blind eye to Hezbollah’s revival while issuing threats and complaints about simple IDF overflights. The hypocrisy is mind-boggling, similar to the situation before the recent war in which UNIFIL allowed Hezbollah to build bases right next to its own and then complained when they were bombed in error.

    Speak for yourself hypocrite.

    in reply to: Boeing Delivers First EA-18G Growler to U.S. Navy #2522567
    kilcoo316
    Participant

    any source?

    HA HA HA… PMSL…

    Comments on all the Hornets A through to F

    http://www.penfieldny.com/photoss/F.a-18C%20Hornet.jpg

    Notice the rudders both canted inboard? They are like that because the elevators don’t have enough authority to get the nose up on take-off.

    See the wing sweep? No neither do I, how many modern supersonic aircraft have wings with such pathetic sweep angles, none – there is a reason for that you know!

    NASA’s involvement with the F/A-18E/F began in the early stages of the proposed aircraft development when the Office of the Secretary of Defense became concerned with range estimates for the vehicle. A three-member NASA/DOD/industry team conducted an independent review of fighter- escort mission range estimates in April 1992. A NASA Langley engineer was a member of this team. Favorable results from this review were critical to the airplane program proceeding forward to the Defense Acquisition Board for funding advocacy. A series of tests in a Langley wind tunnel (8- Foot Transonic) the following month indicated that a spoiler on theleading-edge extension, designed to improve stability at high angles of attack* and reduce aerodynamic buffeting of the vertical tails, caused unacceptable reductions in maximum lift. As a result of these tests, a reassessment of the leading edge extension design was begun.

    Initial results from flight evaluations at Patuxent River in 1979 indicated that the cruise performance of the F/A-18 was significantly below expectations, with a shortfall of about 12 percent in cruise range. The performance deficiency became a weapon for those who sought the termination of the F/A-18 Program. A number of reasons for the poor performance were identified. Modifications to the engines, computer-controlled schedules for the deflection of leading- and trailing-edge flaps, and other changes reduced the cruise range deficit to about 8 percent, but aerodynamic drag remained a problem. Modifications included increasing the wing leading-edge radius, variations in the LEX camber, and filling in the slots in the LEX-fuselage juncture. These changes were implemented on the F/A-18 test aircraft at Patuxent River where they were found to favorably increase the cruise range of the aircraft. The impact of filling in the LEX slot on high-angle-of-attack characteristics was found to be acceptable in additional F/A-18 flight tests.

    With increased service experience, an unexpected problem appeared. It turned out that the Hornet was flown more than initially anticipated in the high angle of attack regime, where aerodynamic loads on the tail from turbulent air generated by the LERX were particularly severe, resulting in fatigue-related cracks in the tail area. The F/A-18 fleet was grounded for a brief time in late 1984 while a fix was developed. In order to correct the problem, McDonnell developed a modification kit which consisted of the addition of four-inch long steel doublers to two of the tail mountings and replacing a non-structural fairing with a stronger fairing. Later, an airflow fence was added to the top of the LERXs to divert airflow away from the fins and enabling pilots to continue to fly their aircraft at high angles of attack without risking damage to the tail.

    in reply to: New Su-35BM already flying? #2522815
    kilcoo316
    Participant

    So of all those things the only things that structurally strengthened the aircraft for heavier landings were twin wheel nose gear (which the heavier Flankers have anyway… and not because of their empty weight but to increase their MTOW) and beefed up main undercarriage. Wow… a whole new aircraft!!!

    There is more to beefing up an undercarriage than simply fitting larger oleo legs!

    All the supporting structure within the airframe – the load paths, they all have to be modified accordingly as well.

    in reply to: Denmark question JSF #2523153
    kilcoo316
    Participant

    To be honest, I think large scale open warfare is obsolete.

    No-one will attack NATO, same as no-one will attack Russia, or China…

    WWIII may be fought initially with jets, rifles, tanks – that would soon become ICBMs.

    WWIV would then be fought with sticks and stones [if even that].

    in reply to: New Su-35BM already flying? #2524239
    kilcoo316
    Participant

    The wing of the F-18 is structurally bad – since the wing has very moderate sweep, it needs to have a very thin aerofoil section to compensate.

    A low thickness/chord ratio is bad for the structural efficiency of the wing spar.

    As has already been said, the F-18 is a naval airframe, while the Su-35 is clearly not. Therefore no undercarriage strengthening, no arrestor hook (and associated structures) – and as I said before, it all snowballs. Save 300kg in dead weight and that can become 400-500kg saved in overall airframe weight very quickly.

    But, as I keep repeating – the F-18 is a ****-poor airframe, indeed, the E/F version is almost certainly the worst ‘new’ airframe to see service in the last 20 years the world over. Its a continual mystery to me why the USN decided to go with the A->D Hornet to start with… and its an even bigger mystery as to why they decided to upgrade it!

    I know people will say the hornet is reliable, the tomcat wasn’t etc. Reliablity comes from avionics and systems, not the airframe itself. Put it like this – given the choice would you:

    Take a Rafale with the F/A-18 E/F’s systems and weapons
    or
    Take an F/A-18 E/F?

    No choice really is it?

    in reply to: AWACS Type Aircraft in Danger? #2524249
    kilcoo316
    Participant

    Yes and no, if long wavelength radars are located near enough to the AWACS they will disclose the general location of any and all aircraft – an AESA equipped AWACs can then concentrate all power on precisely locating the VLO aircraft, increasing its chances of doing so.

    But no long wavelength radar and smart tactics would allow the attackers to drag the HVACAP away with legacy aircraft then swing in behind and nail the AWACS with VLO fighers before the AWACS protection can re-position to defend it.

Viewing 15 posts - 406 through 420 (of 721 total)