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knifeedgeturn

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Viewing 15 posts - 421 through 435 (of 467 total)
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  • in reply to: Rob Davies on BBD Crash #1053803
    knifeedgeturn
    Participant

    Whilst there has been much debate on the point of impact, it looked to me from at least one of the videos, that the p51 was struck on the tailplane.

    in reply to: Miss Helen AAIB Report Update #1054460
    knifeedgeturn
    Participant

    What I find interesting is the fact that many of those who are involved with airshows, flying warbirds, and correct R/T procedure, severely admonish those who stand in fields adjacent to DX airfield, branding them irresponsible, and potentially endangering the lives of the pilots, yet a known problem within the airfield boundary is ignored, on the basis that A/C aren’t meant to be there?

    in reply to: Rob Davies on BBD Crash #1055225
    knifeedgeturn
    Participant

    “The tip of his wing caught my undercarriage” he probably said empenage, but the journo either misheard, didn’t understand the nasty foreign sounding word or else just made the whole lot up…..

    in reply to: Replica Spitfire forced-landing ( Ontario ) #1055946
    knifeedgeturn
    Participant

    Personally I am a fan of the homebuild aircraft, especially warbird types, and this one looks brilliant; ( in the photo) best wishes to the pilot.

    in reply to: Spitfire Mk I P9374 #1058320
    knifeedgeturn
    Participant

    I really don’t get it.

    It’s an authentic Mk I Spitfire…. That flies. What slimy rock must you live under for that to be anything but, (and forgive the internet vernacular,)

    EPIC WIN!

    Or is it an authentic Spitfire I ?

    in reply to: Technology To Make New Merlin Engines…? #1058326
    knifeedgeturn
    Participant

    Well if that isn’t clever, I’d like to know what is!

    The thing is though, it is all down to money, because if you had enough, you could get Rolls-Royce to restart production; in this instance CNC machines are to be used to produce a component from solid that was previously cast, and as such the water ways were easily created by that process.

    Is it really that cost effective when you consider the wastage in machining from solid, and as is the way with these machines, a tool breaking right at the end of the process, rendering the almost complete part scrap, yes you will get failures in casting, but they are put back in the pot.

    I think where the process has merit is producing crankshafts, con rods and reduction gears etc.

    in reply to: Spitfire Mk I P9374 #1059325
    knifeedgeturn
    Participant

    Was it Spitfire I because even when it was introduced there was a Spitfire II on the drawing board? otherwise logically it would have been just Spitfire; most MK no’s are retrospectively applied, eg Ford Cortina, was just that until the MK 2 was introduced.

    in reply to: Technology To Make New Merlin Engines…? #1061064
    knifeedgeturn
    Participant

    Ford did in fact question the tolerances on the merlin, and spent a huge amount of time redrawing it!

    I believe it was little more than “flexing of the muscles” having been effectively forced to build another rival companies product, at any rate they produced merlins that are exactly the same as Rolls-Royce, and Packard, all are interchangeable; (I think they only built the 20 series engines)

    Post war,one has to ask the question what did they learn from the experience, going back to sidevalve engines with white metal bigends, right up to the ’60’s.

    in reply to: Technology To Make New Merlin Engines…? #1061928
    knifeedgeturn
    Participant

    Would the CAA accept any part of an aircraft engine that hadn’t been made using the original manufacturing methods (and materials); and wouldn’t the engine ‘design authority’, Rolls-Royce, need to approve and certify any design mod(ification)?

    I think I’m correct in saying that some new-build parts have been produced (and flown) in the UK for Rolls-Royce Griffon and Bristol Centaurus engines.

    It raises some interesting questions certainly, since the machine-tools, materials and expertise exist (especially in the UK) to manufacture any engine part that was made in the past.

    Perhaps the only real limitation is the cost…..maybe we’ll get those Peregrine engines after all!

    The CAA do accept different manufacturing methods, and also modern material equivilents; specifically they allow machining from solid components, that would have originally been forged, (stamped) provided that they are to the original drgs, and material spec, but as you say it would be a very clever CNC machine that was able to machine internal waterways.

    in reply to: Spitfire Mk I P9374 #1081634
    knifeedgeturn
    Participant

    Lets look at it another way, the mkI had weaker undercarriage pintles than the upgraded mkV (and on), very little to distinguish them, and once fitted to the airframe almost impossible to detect; so if you were restoring a mkI to flying std would you fit the weaker pintles, for the sake of originality, or the stronger type that might make the difference for the survivability for both airframe and pilot on a hard landing?

    in reply to: Spitfire Mk I P9374 #1081883
    knifeedgeturn
    Participant

    I’m sure it’s a very nice aeroplane, quite obviously a Spitfire, but (to my mind at least) not the Spitfire, languishing in the channel.

    in reply to: Spitfire Mk I P9374 #1083676
    knifeedgeturn
    Participant

    No, they didn’t end up in a skip.

    All existing remains of P9374 were acquired by the owners and what isn’t incorporated will be retained by the owners. A surprisingly high percentage of original parts were incorporated in the re-build.

    Are the original components painted a different colour to differentiate between new build ones, as done by the guys restoring Donald Cambells Bluebird? if they are, I’m guessing a small pot of Humbrol was sufficient, with maybe enough left over to paint a 1/48 spitfire…

    in reply to: Lightning cockpit XG 325 #1042190
    knifeedgeturn
    Participant

    I see following advice from an expert, the starting pirice is £4k….seems not such a long while ago Marine Salvage would sell you a complete one for about £5k; times they are a changing (sing it Bob)

    in reply to: How do they do that ??? #1048095
    knifeedgeturn
    Participant

    Black? black? “oh johnny no….

    in reply to: How do they do that ??? #1049026
    knifeedgeturn
    Participant

    As I understand it, soap turns black at about 280 deg, whereas, dural, and alclad need about 500 deg, and once it’s black, it wont go any blacker.

Viewing 15 posts - 421 through 435 (of 467 total)