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Robert Hilton

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Viewing 15 posts - 646 through 660 (of 673 total)
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  • in reply to: Hunter 'blue note' #1304706
    Robert Hilton
    Participant

    A gorgeous sound. Anyone got it as an audio file. What a ring tone that would make for your mobile phone! 😎

    Interestingly, while not the blue note, I seem to remember F-104s having a similarly distinctive howl, as did USAF F4s but not the British ones. Does anyone have similar memories??

    F104s and US F4s had J79 engines, the Brits used RR Spey engines. Indeed the F104 fit was very prone to howl. I always found it a dreadful sound.

    in reply to: Hunter 'blue note' #1304711
    Robert Hilton
    Participant

    For all those who have heard it, the Blue note produced by the Hawker Hunter is a wonderful sound. I have heard this sound produced by Meteors and Canberras but not of the same intensity.

    The term Blue note was originally coined to describe the sound caused by reheat under certain circumstances (combustion howl). It is normally called reheat buzz or screech these days.

    in reply to: Dutch air museum. #1305465
    Robert Hilton
    Participant

    very expensive and only good as static airframes with lots of work and many parts missing! I think the guy has a BMW dealership, this is his “hobby”.

    Yup Piet is well known here abouts, have had a few dealings with him in the past.

    in reply to: Snowplough Schnowplough! #1307394
    Robert Hilton
    Participant

    The MRD, Machine, Runway, Deicer. Two extremely unreliable engines mounted on a frame pushed by a bowser. Spent many a (un)happy hour fixing the damned things.

    in reply to: Abandoned victor #1307406
    Robert Hilton
    Participant

    Not sure, I always assumed it was the first stage fan because that is what I recall Marine Salvage saying it was. (albeit a very long time ago!) It is certainly from a Victor Conway. It is 36 1/2″ dia. if that helps!
    Did all Victor Conways have a zero stage, or was that a mod introduced during service?

    Pete

    The zero stage was added during it’s Blue Steel days if I remember right. It was still fitted when they were converted to K2’s. They gave us alot of problems being light alloy and so long. At least four failed while I was working on them (1982-1986).

    in reply to: Abandoned victor #1308124
    Robert Hilton
    Participant

    Here`s my little bit of preserved Victor. It`s on the wall of our kitchen, where else?! 🙂

    (It matched the decor rather well)

    Pete

    Is that a zero stage?

    in reply to: Lonely ADV Tornado #2519639
    Robert Hilton
    Participant

    And reduces cruise drag a bit. As I said, the Tornado is a very small aircraft and was designed (don’t knoe why) to carry everythink external.

    That’s why a Buccaneer was faster at low level with a war-load (internals only).

    in reply to: Abandoned victor #1308556
    Robert Hilton
    Participant

    XL391

    Robert… The Jonah stuff sounds as though it was all a bit after my time, but it wasn`t the only one to punch through it’s forward jacking points…

    Well that was post Falklands. Indeed it wasn’t the only one to do it. We found out later that there was a restriction on fuel-load and nose jacking. Due to alot of postings, that kind of gen was lost to us and we had to find out for ourselves. As I’m sure you know, the AP’s were not exactly comprehensive.

    in reply to: Abandoned victor #1309511
    Robert Hilton
    Participant

    🙂

    But they had all had quite a hard working life and changes of role… so close to 35 years in service wasn`t bad going.

    I read somewhere that HP were planning a civil airliner version… I may be wrong but civil airworthiness certification wouldn`t have been possible with the engines buried in the wing roots….

    Actually I meant that is was abit of a Jonah.
    It didn’t serve during the Falklands campaign due to an accident, once back together it took the Station Commander to get it airtested (the aircrew were somewhat wary of it).
    Some time later it punched through the forward jacking points on the line.
    It got fixed again, then did a nosewheel-up landing at Ascension Island.
    After being struck-off, it was left to rot at St Mawgan. It was eventually sold to someone who wanted to display it up north I believe. However, it couldn’t be moved so it was scrapped. I think the cockpit survived though.

    in reply to: Abandoned victor #1310332
    Robert Hilton
    Participant

    A shame there aren’t anymore.
    I see 190 lived up to it’s reputation right to the end.

    in reply to: Old airfield on Notts/Lincs border #1311647
    Robert Hilton
    Participant

    Can anyone tell me the name of an airfield on the right hand side of the A46, sandwiched between the A46 and the river Trent travelling south
    The nearest places are Bleasby,Flintham, East Stoke and Syerston.
    The low flying aircraft signs are still there, but the place doesn’t seem to be active. I have looked on Microsoft aerial views, but this does not reveal anything . Also what is or was it used for?

    RAF Syerston. I believe in my Cadet days that it was used for gliding.

    in reply to: what is the story with this F-4 Phantom? #2522004
    Robert Hilton
    Participant

    There was an incident in the seventies of a UK F4 taking off and one wing folding (hadn’t been correctly locked on the ground). I can’t remember if it crashed.

    in reply to: Could this one do supercruise? #2523647
    Robert Hilton
    Participant

    What about Concorde? used the Afterburners to break Mach 1 then ran dry to Mach 2 + a bit.

    True, the ram effect in the intake at Mn 2.0 gave it a pressure ratio of around 6.0:1. Coupled to the pr of the engine (10:1) meant an overal pr of 60:1. That was enough to produce the thrust required.

    in reply to: Could this one do supercruise? #2524206
    Robert Hilton
    Participant

    The inlet can cause some loss even at Mach1 when it is not designed for low supersonic speeds. Most 1960s designs are more optimised for higher Mach numbers as the region 0.9-1.2 is not very desirable.
    I don’t believe that engineers for this design had supercruise in mind.

    “Supercruise” is only really supercruise, when this ability stretches into a useful flight envelope. That is the weak-point on most supercruise-claims.

    The ability to supercruise clean is a quite superfluent except maybe for a recon-aircraft.

    The Lightning had a real bitch problem with the intake, especially after the 300 series Avons were fitted. As for supercruise in a clean state, that depends on the design. If there is a bombbay then with or without a weapon load, the a/c is “clean”. In fact the Lightning could go supersonic with overwing fueltanks (F6)

    in reply to: Could this one do supercruise? #2524973
    Robert Hilton
    Participant

    Actually, I see first class area ruling. And I think it is possible that it went supersonic without afterburner. Some indications that might help to find that out:
    – TW-ratio (static)
    – bypass ratio
    – inlet ramp construction
    – drag

    The difficulty of finding it out grows downwards, but I guess if the first is close to unity and bypass is zero, we could have a winner. Make the aircraft clean, have a cold day and tell the pilot to be triggerhappy with the throttle and it might suffice.

    Supercruise is no Wunder. But I think (though I can’t prove it), that transonic drag has been reduced since first generation Mach 2 jets.

    How would an inlet ramp help at low supersonic speeds?
    Even the F16 uses what is basically a pitot intake.
    The Lightning can supercruise (Mn 1.1 without reheat) and that is a fairly old design.

Viewing 15 posts - 646 through 660 (of 673 total)