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Fedaykin

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  • in reply to: Can fly by wire Airbus airplanes recover from a stall #2228281
    Fedaykin
    Participant

    Like the Airbus that went in off Brazil in a storm, the AirAsia Airbus too went in during a storm. The latest information released indicated the co-pilot was flying at the time of the crash. But there is some information that the Airbus stalled. The plane of course is a fly by wire with the pilot suggesting to the computer what he wants, and then the computer flys the aircraft.

    My question is can an Airbus be recovered from a stall? Does the fly by wire flight computer allow pilot input to recover. In a couple of other Airbus crashes where the whole vertical stab broke off the plane, Im sure the software in the computer was reprogramed to limit pilot input and rudder movement. But the question is will the computer allow a pilot to do standard stall recovery procedures like opposite rudder and pitch down till rotations stops?

    During testing has an Airbus been stalled? Will the computer co-operate? Does anyone know for sure?

    Firstly this is military aviation so you have posted in the wrong place.

    Secondly going on the nature of the question am I right in thinking that you are in the “Fly by wire” takes away the pilots ability to save the day line of thinking?

    First of all I suggest you go and read the book “Fly by Wire: The Geese, the Glide, the Miracle on the Hudson” by William Langewiesche, it is a short read but it goes into the philosophy behind the design of the fly by wire system in Airbus types.

    http://www.amazon.com/Fly-Wire-Geese-Miracle-Hudson/dp/031265538X

    Your question about their ability to recover from a stall is also rather nonsensical considering how Airbus aircraft are designed from the A320 on, they are designed with flight envelope protection that prevents stall. In an A320 you get 30 degrees pitch and 45 degrees roll, the flight computer won’t let you exceed that. For example if you retard the throttles and pull the stick hard back the engines will automatically go to max and the aircraft will go into a climb if there is altitude to spare or start to put the nose down. This video of Bruce Dickinson nicely shows that:

    Going back to the book I mentioned it goes into some depth about the Airbus test pilot Bernard Ziegler who helped develop the airbus safe flight envelope concept. He has some rather sharp views about airline pilots and what they can do, to be blunt he sees them as bus drivers and system managers and if you give them the full flight envelope they are more likely to crash the aircraft in a stall situation than save the day.

    This isn’t to say that Airbus are totally free from risk, the flight data sensors can be fooled and pilots can do stupid things.

    Bernard Ziegler is in this video, very interesting career this guy had:

    in reply to: USAF picks Boeing 747-8 as next Air Force One platform #2228282
    Fedaykin
    Participant

    Plane will be soon 50 years old; https://www.youtube.com/watch?v=lAKWi6Bf-wQ

    747 certainly is that old as a general type but the VC-25 are much newer, first flight 1987 and entry into service 1990.

    VC-25 is on paper a modified 747-200 series which is in itself curious considering the 747-300 and 400 series entered into service in 1982 and 1989 respectively.

    In reality the VC-25 is a hybrid of the 747-200 fuselage and avionics mated to the 747-300 wings and engines with a dash of 747-400 thrown in for good measure. Actually the airframes could easily fly for another forty to fifty years considering they barely have the flight hours or cycles of a civil airline. What is driving the replacement is the avionics. The USAF could of gone for the digital avionics much like that fitted to the 400 series but they were concerned about its robustness and reliability. That decision has made it increasingly difficult to operate the aircraft within modern civil regulations and due to the custom nature of the aircraft an avionics update would be complex, costly and time consuming for a fleet of two aircraft. So the easier route is to buy new and as Airbus were not going to bother and the 747-8 is the only four engine wide body left in US production. There was talk about going for a 777 variant but I bet it was rejected as it just doesn’t have the same image as a big 4!

    Another advantage going for the 747-8 is the production line is underworked unlike that for the 777.

    in reply to: Greek F-16 down at, Albacete, Spain… #2229535
    Fedaykin
    Participant

    Now been confirmed that 2 Greeks & 10 French have died, many aircraft have been destroyed.

    The French Air Force have lost 2x Rafale’s, 2x Mirage 2000Ns & 2x Alpha Jets

    The Hellenic Air Force have lost a single F-16

    The Italian Air Force have lost 1/2 AMXs

    My word that is horrendous!

    My sympathies as do all of ours here go out to the families!

    in reply to: Cutting the engine in flight #2233118
    Fedaykin
    Participant

    Nobody in their right mind is going to switch off their engine in combat, as already pointed out modern missiles image on the airframe. Actually that has been the case since missiles like the AIM-9L came into service over thirty years ago!

    Anyhow the engine would still be very hot even switched off and what if you can’t get started again?

    Fedaykin
    Participant

    i was thinking the story probably more BS than truth but then again could it be something similar to CHAMP ?
    http://www.boeing.com/Features/2012/10/bds_champ_10_22_12.html
    http://www.gizmag.com/boeing-champ-missile-test/24658/
    http://www.nature.com/news/microwave-weapons-wasted-energy-1.11396

    Oh no not this again!

    Somebody put this up months ago! IT IS TOTAL BS!

    If you trace back to where it originated it was posted on a Russian forum by some rather over enthusiastic/nationalistic Russian bloggers! Unfortunately it got picked up by a news aggregator website and very quickly went around the world becoming more lurid with each retelling! One news outlet got the opinion of somebody from an obscure Russian think tank who then threw in all sorts of wild speculation making the story even more lurid!

    If you type USS Donald Cook into google now you will get hundreds of conspiracy laden articles all unsourced all talking of unnamed sources within the Russian MOD or the Pentagon.

    It is a joke, the ship made a routine port visit and was patrolling the Black Sea to offer reassurance to allies at the time. Even if the Russians did buzz the ship they are hardly going to know the state of her combat systems so the stories of jammed AEGIS that came ENTIRELY out of the Russian blogosphere should only be dismissed as fantasy. The 27 crew members is clearly just a nationalistic jab at the US by inferring cowardice in the face of Russian intimidation.

    There is no more to say about this apart from ignore it!

    in reply to: How would you re-build the Argentinian military aviation? #2234715
    Fedaykin
    Participant

    Argentina is struggling to get parts from Dassault to do the SEM upgrade to their Super Etendard so I hardly see it being an easy task procuring the production line for the Mirage 2000. India with its far deeper pockets baulked at that idea so forget Argentina, anyhow what is particularly in it for France, Dassault or SNECMA?

    Jaguar from India? Your having a laugh are you?! Who holds the joint ip rights to that aircraft alongside Dassault, oh yeah that’s right BAE Systems! Just because Honeywell engines could be integrated on the Jaguar doesn’t mean they can sell it on the aircraft without permission from the oem! Also if you are keeping up with the Indian Jaguar engine upgrade you will find that program has stalled and there are rumours the plug is going to be pulled.

    in reply to: Falklands – cruise missiles strike. #2025236
    Fedaykin
    Participant

    As Jonesy points out a container base NSM solution would be very interesting, the major issue would be providing targeting data.

    I suppose you could use Typhoon for that but then you might as well integrate NSM on the jet and not bother with the container. Adding NSM to Typhoon would give a global rather than a Falklands unique solution. Not that it would happen aside from the cost it would interfere with Spear 3. Also putting any offensive antiship missiles on the Falklands would rather undermine the whole defensive posture we are trying to forward on the Islands.

    in reply to: PLAAF crisis #2235382
    Fedaykin
    Participant

    again don’t compare Chinese own industries that are complete failure with Russian. your confusing a lot of things like assembling foreign with own R&D. Chinese research is very dysfunctional.

    Don’t confuse your xenophobic, biased opinions with reality JSR…

    in reply to: R-73M2 vs AIM-9X Block II #1788149
    Fedaykin
    Participant

    You have things backwards in respect of the ASRAAM and AIM-9X seeker. The FPA seeker was developed by Hughes for the ASRAAM. Hughes won the program to develop the AIM-9X, they used the seeker they developed for the ASRAAM in their missile design. It is interesting to note that both Raytheon and Hughes submitted two different designs each for the competition reusing the motor and warhead from the older models already in service.

    Raytheon then acquired the Hughes missile division bringing the winning Hughes design into their product line.

    in reply to: Mildenhall and Alconbury to close #2235740
    Fedaykin
    Participant

    Whilst it is sad I am not particularly surprised, the US DOD needs to make savings and the refocus on the Pacific means there has to be some consolidation.

    One surprising aspect is the tankers leaving altogether considering the recent deal to support UK RC-135.

    Another interesting note is the USAF RC-135 will be relocated somewhere in the UK. I would actually argue there is a strong argument to move them to Waddington and operate them alongside the UK examples. As UK RC-135 are being supported by the US anyway and our crews are trained by them as well I could see a certain degree of synergy in basing them at the same place.

    in reply to: PLAN News Thread #4 #2025432
    Fedaykin
    Participant

    I don’t agree with your position that current Chinese carrier progress is at a snails pace! Actually I think quite the reverse, they are going at a startling pace especially considering they only have ONE CARRIER how many times do I have to repeat myself on that?!

    So why would I speculate on your question? I don’t agree with the proposition or position you are taking now.

    I repeat they have managed to got to at sea flight trials in less than a year and are now introducing what looks like the initial serial production examples of the J-15. In three years to be at that place with only one carrier and no historical background in carrier operations is amazing.

    That you are judging that Chinese deck operations must be too rigid based upon some pictures of some serious looking deck crew from a known state sponsored news channel is absurd! That you seem to think that China isn’t matching America in only three years then drawing the conclusion that means there a serious crisis within their carrier program is absurd!

    in reply to: SDSR 2015 Place your bets…. #2235853
    Fedaykin
    Participant

    Not particularly vague.

    Unless you are a nutter of course in which case it was very vague and the story is total bunk.

    Where is the evidence? No Map! No documents! No evidence of a briefing! What do these mysterious cabinet papers actually say?

    The story is total bunk!

    in reply to: How would you re-build the Argentinian military aviation? #2235856
    Fedaykin
    Participant

    ¿Iran? Are you guys being serious? Iran is a political and military enemy of Argentina. Every year in the UN the argentine goverment calls for iran to deliver it’s high ranking politicians acussed of planing and excecuting the horrendous terrorist attacks agains the jewish mutual organization (AMIA) and embassy, that produced in combination over 600 cassualties and 200+ killed argentine citizens and visitors.

    Iran is as realistic as a military partner for Argentina as the Klingon empire.

    The FAA has rejected many supperior aircraft to a modernized F-5, or dead end Mirages F-1. They want something better and it appears it will be the, still to be developed in full, Brasilian Gripen. The critical stop gap still seems to be Kfirs from the israelies.

    On a personal level, I dissaprove the Gripen as the main fighter for the future. I think it comes short in many mission profiles. Still, it could be good. We will see.

    Gripen is dead in the water it relies on British components and IP. Over 30% of what is in a Gripen comes from Britain.

    in reply to: PLAAF crisis #2236224
    Fedaykin
    Participant

    No he isn’t trolling but he is making fun of you with those links:

    http://www.amazon.ca/Dragons-Wings-A…/dp/1906537364

    http://www.amazon.ca/Modern-Chinese-…0810152&sr=1-1

    The author is Andreas Rupprecht, in itself not that exciting except for one small thing. The forum member you have been arguing with Deino IS Andreas Rupprecht as many members of this forum know full well. You are trying to argue with and correct the man who “Literally wrote the book” on modern Chinese military aviation.

    By his own admission Deino admits that there are gaps in his knowledge due to the secretive nature of the Chinese aerospace industry but he is regarded here as the expert on the subject and the person we run things past when discussing Chinese military aerospace. Kanwa on the other hand your main “Source” is derided amongst aficionados of Chinese defence aerospace as biased, highly inaccurate purveyor of opinion pieces.

    All you are doing is digging yourself a silly hole here…

    As Latenlzy points out research into the modern Chinese aerospace and defence industry can be an addictive hobby, it can take years to tease out what is happening from the Chinese blogosphere and random official releases of information.

    in reply to: First US F-35 in Europe to be based in UK #2236229
    Fedaykin
    Participant

    Sainful abdid there is a general news thread and an F35 dedicated one, can you post this there rather then start a new thread.

Viewing 15 posts - 316 through 330 (of 5,046 total)