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Robbiesmurf

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Viewing 15 posts - 211 through 225 (of 473 total)
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  • in reply to: The truth about the F-22 #2176600
    Robbiesmurf
    Participant

    That depends. F-15’s nozzles are not the most efficient solution (from drag POV).

    They are from a thrust POV. They are con-di..

    in reply to: Vulcan Last Flight? #866928
    Robbiesmurf
    Participant

    Re Post #78. The object of the exercise was not to obliterate the runway – we would (and did) need it later. I would suggest that Black Buck caused the involuntary loosening of quite a number of sphincter muscles in Buenos Aires?!! I remain proud to have been part of the teams that made Black Buck work!
    HTH
    Resmoroh

    I was as well. Kept the tankers going. It’s just the old ribbing from the time, nothing more. If we weren’t going to help them, Tuxford’s team wouldn’t have done what they did.
    I know they chose to straddle the runway with the object of hitting it once. Mainly to improve their chance of hitting from altitude, and indeed, BA did quieten down…

    in reply to: The truth about the F-22 #2176678
    Robbiesmurf
    Participant

    Robbie, if there is some parts you disgree with Andraxxus, just point it out and explain why you disgree, that would save time and alot better than asking everyone about afterburner

    I pointed out that there were a lot of figures that can be used to impress others.
    There is a difference between knowing and understanding. I merely asked him and he answered by throwing more figures at me. Nice, if you can’t dazzle them with diamonds….
    You’re right I have asked a couple of you about reheat and the answers you give appear to come from a Wiki explanation. It’s incorrect btw.
    If you take the trouble to read the RR book about the jet engine it explains it very simply and well. The difference between knowing and understanding..
    Seeing as figures seem to impress most of you, a simple question.
    An example jet engine at full rpm has a jet pipe temperature of 1000 degrees Kelvin. The reheat is engaged to full and the jet pipe has a temperature of 1690 degrees Kelvin. What is the thrust increase?
    It’s a simple calculation.

    in reply to: The truth about the F-22 #2176772
    Robbiesmurf
    Participant

    My working area was also what you call turbo machinery, Known in the RAF as A Tech P.
    My specialists were: BAC Lightning, HS Buccaneer, Hawker Hunter, Sepecat Jaguar and HP Victor. After that it was Boeing 707,737 & 747 plus Douglas DC8,9 &10. If I were to add all the stuff I serviced casually (visiting a/c) I could probably add another 20 types or so.
    Yes I have a good understanding of how a/c work.
    Seeing as you are a turbine man, how does reheat increase the thrust? I don’t need the figures, just the basic working.

    in reply to: Vulcan Last Flight? #867400
    Robbiesmurf
    Participant

    And they missed the runway 20 times….

    in reply to: The truth about the F-22 #2177007
    Robbiesmurf
    Participant

    You throw an awful lot of figures around Andraxxus, do you actually understand them?

    in reply to: There's gold in them there fields……….. #870124
    Robbiesmurf
    Participant

    I hope you didn’t press it, you never know what will go off..

    in reply to: The truth about the F-22 #2178298
    Robbiesmurf
    Participant

    We have lived with the propaganda and hype about the power the F-22 too long. From year 2000 to 2012.

    1. F-22 is not a stealth aircraft world number one. F-35 has RCS smaller than F-22

    2. The F-22 is not the aircraft avionics world number one. F-35, Typhoon and Rafale have even better technology on F-22’s systems

    3. The F-22 is not the most maneuverable aircraft world. Su-27/30/35, Rafale, F-15C, F-16C/E, Typhoon even J-10/11 are the maneuverability aircraft F-22 higher

    4. F-22 in the duel with Typhoon, EA-18G, Rafale ….! F-22 are intended to fail.

    5. F-22 aircraft is the only 5th generation no HMDS system, Typhoon, Rafale even MiG-35 are equipped with this system.

    6. F-22 aircraft is the only 5th generation without using materials RAM

    7. F-22 is struggling to upgrade avionics and weapons. Expected in the period 2017-2020, the F-22 can use the AIM-9X, AIM-120D and HMDS was put on equipment.

    8. F-22 is a 5th generation aircraft first encounter many accidents.

    9. F-22 does not have the ability to use anti-ship weapon.

    10. The maximum speed of the F-22 is inferior to the MiG-21 and F-4

    11. Until the present time, the F-22 only use AIM-9M, AIM-120C5/6 (unknown F-22 can use version AIM-12C7)

    http://aviationweek.com/blog/f-35-stealthier-f-22
    http://www.dailytech.com/F35+Stealth+Coatings+Applied+to+F22/article21321.htm
    http://www.janes.com/article/51375/f-22-notches-first-guided-aim-9x-sidewinder-firing
    https://www.flightglobal.com/news/articles/usaf-wants-improved-day-night-f-22-raptor-helmet-by-413962/

    Are you here to provoke a reaction for a laugh?

    Robbiesmurf
    Participant

    It did auto-rotate. It is also the holder of the record of longest auto-rotation..

    Robbiesmurf
    Participant

    I know a French helicopter pilot reached over 40,000ft. The engine flamed-out which ended the attempt.
    If he did that direct from take-off I don’t know.

    in reply to: RR Merlin 224 diagram #874549
    Robbiesmurf
    Participant

    Nice picture.
    Merlin 224 Packard built Merlin Mk24. Two speed single stage supercharger.
    Fitted to Lancaster I or III

    Robbiesmurf
    Participant

    I agree. A pop-surge is always a disconcerting thing.
    Landing as well does demand concentration and a calm approach.

    Robbiesmurf
    Participant

    ETOPS.

    Robbiesmurf
    Participant

    ?
    What is a nozzle duct?
    Surging is not to be taken lightly, air reversal can damage a compressor severely.
    Unburnt fuel from the combustor (combustion chamber?) if you’re unlucky and it slows down enough to burn in the turbine area will certainly shorten it’s service-life…

    Robbiesmurf
    Participant

    Stall/surge caused by overfuelling/birdstrikes/compressor damage or air management problem?

Viewing 15 posts - 211 through 225 (of 473 total)