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Ryan

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Viewing 15 posts - 391 through 405 (of 568 total)
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  • in reply to: 2017 F-35 news and discussion thread #2208987
    Ryan
    Participant

    Top left.

    Watch the US Marine Corps’ F-35 run and gun for the first time

    (The F-35B makes history firing its gun pod in the air for the first time.Dane Wiedmann / Lockheed Martin)

    Obviously wrong though.

    in reply to: Russia moving tac air troops to Syria #2208991
    Ryan
    Participant

    I’d imagine Israel would have been more than a little upset if Russia had moved nukes into Syria too.

    in reply to: 2017 F-35 news and discussion thread #2208994
    Ryan
    Participant
    in reply to: 2017 F-35 news and discussion thread #2208995
    Ryan
    Participant

    Do you even stop to READ the stuff that you post? Captain Penfield makes no mention of LOAL capability – he is commenting on a carry trial, an event that he describes as a milestone.

    According to Capt. Jeffrey Penfield, the U.S. Navy’s Air-to-Air Missile program manager, reaching this milestone is critical for maintaining a leading edge for U.S. and allied aviators.

    “Completion of this test means our warfighters are another step closer to receiving the world’s most capable infrared air-to-air missile,” said Penfield.

    “The AIM-9X Block II is a revolutionary weapon that will give the warfighter a critical advantage. No other missile in the world will match the AIM-9X Block II in range, maneuverability, off-boresight capability and speed.”

    I try to use official briefing material or sources such as the GAO and DOT&E when looking for information on US weapon systems. The official DoD reports that I consulted make it clear that the Block I missile had a limited LOAL capability.

    You should try using the missile manufacturer and Navy Captains. That way you’ll not only be correct but you’ll also be able to show your sources. I note that you’ve reduced to ‘limited LOAL capability’ now though. I’ll take that as a sign of progress regardless of whether you would equate ‘limited’ to ‘no true capability’, which is all I stated.

    None of the eight websites you cite as evidence to the contrary are official sources. In your posting 1378, you assured us that defence journalists “have a tendency to copy and paste errors among themselves”, but here in posting 1398 you are citing the output from journalists as evidence. Perhaps they have been copying and pasting errors again…

    Indeed, fair point, only one of them is a source held as infallible at one point in time by others. Bottom line is that I don’t need any more sources, like Flight Global and Defense Update, I have the missile manufacturer and a Navy Captain and I’ve shown and quoted those two sources. It just happens that those two other sources agree with the Navy Captain and the missile manufacturer, so I thought I’d throw them in there. But a primary and a secondary source should be enough.

    in reply to: 2017 F-35 news and discussion thread #2209002
    Ryan
    Participant
    in reply to: British and Japan: new stealth fighter? #2209008
    Ryan
    Participant

    The TE of the wings and tail plane don’t seem parallel.

    in reply to: 2017 F-35 news and discussion thread #2209015
    Ryan
    Participant

    Face it, all weapons manufacturers talk up their own gear and rubbish the opposition, even when they are manufacturing both weapon and countermeasure. The only realistic arbiter is war, and we haven’t had one of those for a long, long time. When a high-end conflict really does break out, I expect there will be almost as many unexpected and unwelcome lessons as were learned in 1914. Platforms and whole classes of equipment that are currently at the core of military inventories and planning assumptions will be found to be obsolete within the first few months of conflict. It’s like a bushfire: there’s a lot of old growth built up in them forests, just waiting for the spark…

    And just as the experience of slaughtering Zulus, Tibetans, and other unfortunate natives did not exactly prepare the British for what they found on the western front, the recent neo-colonial experiences of the United States will not have prepared it for conflicts that may eventuate with e.g. China or Russia.

    To some extent but testing has not demonstrated an effectiveness against IIR for flares and the maths is not in favour of brief target obscuration leading to a miss either. In a war I fully expect DIRCM would make it onto fighters surprisingly quickly if the enemy had IIR missiles but right now, no enemy actually does have IIR missiles, so the emphasis is not that great.

    Nobody expected slaughtering Zulus to prepare them for WWI and nobody expects fighting ISIS to prepare them for WWIII.

    Now this is ridicules. Why are you drawing scenario where any fighter starts turning when the missile is right up their @ss??
    The whole point of sensors like PRESIDENT or similar systems is to give a pilot a heads-up, so that he can turn in time.
    And what is this crap about hiding the plane for 1 sek..?? How the hell would you know?

    Well you referenced a ‘brief moment’ in your earlier statement. How long is your brief moment exactly? My point was that brief moments do not lead to significant deviations of intercept trajectory, even under highly optimistic conditions. Missile’s move faster than you think, WVR, the missile is already up their backside as soon as it’s launched, especially if it has the newer 160+mm rocket motors. A missile travels 1km in a second and a plane can realistically only alter its true intercept point by a few dozen metres during the same period. And we’re talking about having to actually change their turn angle, if the missile sees the turn angle, it will counter it, so they must change it just as the missile loses sight. And this all assumes the flare can block out all frequencies in two bands simultaneously. Now if you spread out the energy over many frequencies like that, you tend to get dim flares, which are equally ineffective.

    in reply to: 2017 F-35 news and discussion thread #2209017
    Ryan
    Participant

    The SpaceWar item was a minimally-edited version of a public-relations handout – a Raytheon press release dated Sept 18 2008. In it, Captain Jeffrey Penfield says nothing about LOAL – he is commenting on the carry trial that is the subject of the press release.

    The author of the Jane’s item was not a journalist but a professional defence analyst, and he was citing US Navy briefing documents as the source of his information.

    Various reports by the DOT&E (a much more reliable source than a company PR department) make it clear that the Block I was intended to offer some degree of LOAL capability, but that at least some Block I LOAL trials did not go well, and required the missile software to be updated.

    Another point worth making is that today’s flares include powered variants that can be set to fly in formation with the aircraft, move ahead of the aircraft, or lag behind the aircraft.

    They quote him directly.

    According to Capt. Jeffrey Penfield, the U.S. Navy’s Air-to-Air Missile program manager, reaching this milestone is critical for maintaining a leading edge for U.S. and allied aviators.

    “Completion of this test means our warfighters are another step closer to receiving the world’s most capable infrared air-to-air missile,” said Penfield.

    “The AIM-9X Block II is a revolutionary weapon that will give the warfighter a critical advantage. No other missile in the world will match the AIM-9X Block II in range, maneuverability, off-boresight capability and speed.”

    If a USN Captain who uses the missiles (and has likely seen the briefing documents and flight envelope first hand) and the missile manufacturer say that LOAL was added in Block II, then I’m happy to take that version but you’re welcome to continue to defend the honour of Jane’s with documents nobody else can see if you wish.

    http://www.raytheon.com/capabilities/products/aim-9x/

    A range of other sources also back-up this version, but like I said, what the manufacturer and end user say is good enough for me.

    https://www.flightglobal.com/news/articles/exclusive-raytheon-adapts-aim-9x-for-air-to-ground-mission-335762/
    http://foxtrotalpha.jalopnik.com/why-its-sad-that-the-f-22-just-fired-its-first-guided-a-1704889474
    http://navaltoday.com/2017/04/03/raytheon-gets-200m-for-aim-9x-block-ii-deliveries/
    http://www.airforce-technology.com/projects/aim-9x-sidewinder-air-to-air-missile/
    http://www.militaryaerospace.com/articles/2016/07/aim-9x-air-to-air-missiles.html
    http://www.fi-aeroweb.com/Defense/Sidewinder.html

    And even the so dearly beloved defense-update:

    http://defense-update.com/20110920_raytheon-aim-9x-block-ii-airair-missile.html
    http://defense-update.com/20130722_aim-9x-block-iii-to-become-a-bvr-missile.html

    in reply to: 2017 F-35 news and discussion thread #2209033
    Ryan
    Participant

    For someone whom come across as a specialist on this field, you seems to know little about how the modern dynamics of self protection suite really works.

    Its no longer the pilots job to deploy Flares on incoming missiles. The pilot can launch flares manually if he so wants to. But take the PRESIDENT system. Onboard systems will launch flares if its sensors detect a lock-on. It will also time any incoming missiles better vs any pilot can today, and launch Flares, the pilots job is to understand at which vector the missile is inbound and take the correct evasive manuvere.

    You do not need to point out that there is limitations in how many flares a jet can launch. The Flares launcher cartridge has never been larger than they are today, holding up to 100’s of flares in some cases.
    And there is a perfect reason why the launch rate is as fast as it is today. Like other members have already pointed out, its about overloading the IIR sensor, even for a very brief moment, it can prove enough, when we know the speed of missiles.

    Depends on whether CMSP and CMSC are set to automatic or manual and it is still down to the pilot to manoeuvre the plane in such a way as to hide it. Some systems will tell the pilot which way to turn but they will not automatically maintain an aircraft directly behind a flare for long enough to be effective against IIR.

    A brief moment isn’t good enough unfortunately, because the guys who do ECCM have already anticipated that. The missile knows where the plane was going before that brief moment and how fast and it’s acceleration approximately and the most a plane can turn in say 0.1s is about 3deg (even at sea level). Assuming this change in acceleration is instantaneous, which of course it isn’t, and the pilot times the shift in acceleration exactly to match the ‘brief period’, which isn’t remotely likely, a plane doing 250m/s (M0.85 at 36000ft) will alter its CoM position by 1.31m, which probably won’t even be enough to avoid a direct hit, never mind a proximity burst. Hide the plane for 1s and again assume peak ITR and instantaneous manoeuvre and the deviation becomes 13.1m, or about one wingspan. One wingspan vs 10-12kg proximity burst, my money is still on the missile. Of course, in reality these deviations are halved by virtue of the fact that the change in acceleration is not instantaneous and further reduced by the fact the plane is usually not at sea level. So even in probably the most optimistic scenario imaginable, the flares are unlikely to work.

    in reply to: 2017 F-35 news and discussion thread #2209040
    Ryan
    Participant

    Flares will still continue to sell whilst significant numbers of IR missiles remain in service and there doesn’t exist a fielded alternative. The effectiveness against IIR has no bearing on that.

    In addition to my previous link, I will counter your Jane’s quote with Raytheon’s own statement.

    http://www.raytheon.com/capabilities/products/aim-9x/

    The new Block II variant adds a redesigned fuze and a digital ignition safety device that enhances ground handling and in-flight safety. It also features updated electronics that enable significant enhancements, including lock-on-after-launch capability using a new weapon datalink to support beyond visual range engagements.

    I have first hand experience in this subject subject matter and I think it can be agreed that defence journals can be inaccurate, latest case in point being your recent quote from Jane’s that contradicts both a USN Captain and Raytheon. With Jane’s probably even being one of the better defence journals.

    in reply to: Russia moving tac air troops to Syria #2209055
    Ryan
    Participant

    I’m going to ask an utterly stupid question. Are there any Russian nukes in Syria?

    I know it’s a ridiculous question but I have someone telling me that there are.

    in reply to: General Discussion #238382
    Ryan
    Participant

    in reply to: 2017 F-35 news and discussion thread #2209098
    Ryan
    Participant

    I have witnessed testing and the methods being stated do not work.

    Several types of IR guided missile have LOAL capability but no datalink. One obvious example is the AIM-9X Block I.

    No true LOAL.

    http://www.spacewar.com/reports/Raytheon_AIM_9X_Block_II_Missile_Completes_First_Captive_Carry_Flight_999.html

    “By adding lock-on-after launch capability and a one-way forward quarter datalink capability, the Block II builds on the legacy of the more than 3,000 AIM-9X Block I missiles Raytheon has delivered.”

    in reply to: 2017 F-35 news and discussion thread #2209138
    Ryan
    Participant

    I’ve already read it and replied. A flare can temporarily block the aircraft if it is sufficiently wide in frequency bandwidth and on the direct LOS, but the target will not remain completely behind a flare, and the seeker (at least the one I’ve witnessed), will pick out the aircraft even from between the flares, even if partly covered. Flares were not even fully effective against IR missiles with decent ECCM techniques, and they are definitely ‘near useless’ against IIR, as proven by testing. Then you have the whole proximity fused warhead problem, such that even if the flares work, well, it still might not be enough.

    We’re talking about flares here, not the sun, they are not bright enough to completely overload the seeker.

    in reply to: 2017 F-35 news and discussion thread #2209143
    Ryan
    Participant

    Agree with Trident. Its interesting to see how Flares mounted on fast jets has changed and improved over the decades. I’ll take flares over none flares any day of the week. They won’t get replaced anytime soon.

    Well yeah, lots of non-IIR missiles still out there, especially wrt COIN type combat. They’re better than nothing. A knife is better than unarmed, even in a gunfight.

    But there are plans afoot.

    F-35
    http://aviationweek.com/defense/northrop-develops-laser-missile-jammer-f-35
    PAK-FA
    http://i.imgur.com/DstsDH5.jpg

    This is a far more reliable method of effectively remaining completely behind a flare but still not full proof. I know how I’d counter it, even if I couldn’t reliably filter out that frequency.

    https://i2.wp.com/defense-update.com/wp-content/uploads/2015/11/music-jam1021.jpg

Viewing 15 posts - 391 through 405 (of 568 total)