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DeHavEng

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Viewing 15 posts - 16 through 30 (of 120 total)
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  • in reply to: Sea Vixen Question #1232868
    DeHavEng
    Participant

    the fairing in question is a warm air bleed from the compressor section of the port engine for the purpose of rain dispersal, de-icing and canopy demisting. other aircraft have this arrangement but it is normally buried in the fuselage and is not visible from the outside except for a small pipe underneath the windscreen. It is only really fitted to highspeed jet aircraft as windscreen wipers tend to be ineffective above certain speeds .

    in reply to: Gone Tech or U/S??? #1168000
    DeHavEng
    Participant

    Either way you say it, the crew get to retire to the crew room / hotel, whilst the poor unloved grasemonkey gets to go out in the cold , rain , wind or snow on a dark night and fix it!!!
    Belive me, I know.

    Normally to find it’s a pilot interface problem:diablo:

    in reply to: Can anyone ID this seat? #1177136
    DeHavEng
    Participant

    looks remarkably similar to a Harvard seat

    in reply to: Moderator's message to all: Private Message spammers #1177909
    DeHavEng
    Participant

    Just had one from Dragoscon with a link to amazing youtube

    in reply to: Gannet XL500 flies #1182682
    DeHavEng
    Participant

    Just wondering if there is a chance we could see this and the one at Gander flying together sometime in the future?

    Or how about a proper RN Formation , Sea Vixen, Gannet & Bucc

    in reply to: Basic JET start-up question #1215891
    DeHavEng
    Participant

    I can recall a story told by one of my instructors who was a sooty on Frightnings. Said sooty was conducting a ground run with another guy. Start up was fine, run up to full burner, guy on the ground starts waving franticly and pointing, said sooty looks behind him to see the entire spine on fire, swift exit from aircraft followed. Turned out avpin had leaked over both engines, the intial detonation ruptured the fuel lines. Needless to say the Frightning was a write off.

    in reply to: Foxys back! #1216624
    DeHavEng
    Participant

    Can anyone please clarifyconfirm this? My understanding from speaking with former Sea Vixen pilots is that due to the transonic characteristics of the Vixen, they were never able to exceed Mach 1.0 in level flight. However, Mach 1.2 was normally achievable in a dive of approx 30 degrees.

    That would be true of a normal Vixen. Foxy is far from normal. To be wholey accurate she is a demilitarised D.3. She doesn’t have the near 1 ton of radar in her nose nor the very heavy and cumbersome radio fit of her service career. During her conversion to D.3 status FRa also added afew modifications to her systems, effectively ‘tweaking’ airframe and engine performance.
    All this adds up to her being supersonic (Mach 1.23 as I remember) in level flight at her optimum cruise altitude and lighter on her feet.

    in reply to: Basic JET start-up question #1217515
    DeHavEng
    Participant

    lets not forget the good old AVPIN starters as fitted to lightning, hunter etc…..apparently a hair-raising event when using AVPIN starters.:D

    in reply to: Foxys back! #1218739
    DeHavEng
    Participant

    I have to admit the Red Bull colour scheme grew on me after a while.

    God don’t say that too loudly will you, you might end up as someone’s pin cushion:D

    in reply to: Foxys back! #1218914
    DeHavEng
    Participant

    Blimey! Didn’t even know the CAA allowed that sort of thing! 😮

    My congratulations to all involved! 🙂

    CAA do EASA probably won’t! Well done lads, it’s great to see the Big Girl back where she belongs

    in reply to: Foxys back! #1219335
    DeHavEng
    Participant

    yep super sonic is right. She’s europe’s only supersonic civilian aircraft.

    in reply to: Advice for cleaning aircraft perspex/acrylic windows? #1222096
    DeHavEng
    Participant

    rags in water is best, have just used the same method on a couple of windows and it comes off a treat. It’s best to leave it until it’s a very pale coffee colour before you start trying to take it off.

    in reply to: jet engine servicability for ground runs ? #1235508
    DeHavEng
    Participant

    I am very familiar with those rear bearing oil charges! 1/5th of a pint each I belive, which is 5 strokes of our little priming unit each.

    Good man some people either don’t know or simply don’t bother

    We are also very “temperature aware” and watch the EGT like hawks on every start. To be honest, I don’t belive you can ever considder running any old engine, of any type as totaly safe, there will always be an element of “calculated risk” involved. The main thing is to keep those risks as low as is absolutly possible.

    I couldn’t agree more too many people get hold of an engine and go wild.

    I keep a very detailed log of all our running time, including timing the rundown of the engine from H.P. **** closure on each run. This gives a good indication of the bearing states and any friction appearing in the engine.
    Our group also consists of a good cross section of very expirienced and qualified engineers, as well as the usual weekend amatures, and we all talk and listen to each other, remember, no one knows it all, and you never stop learning.

    A fantastic lesson in how to ground run a living breathing engine:)

    in reply to: jet engine servicability for ground runs ? #1236424
    DeHavEng
    Participant

    To quote Mr H Simpson….D’oh:D

    My Friend Owns WW453 with a Alvis Leonedies Radial Engine, as fitted to all Provost T.1
    thanks for your advice though, if i ever get a JP, then i will take your advice,
    😀

    in reply to: jet engine servicability for ground runs ? #1236435
    DeHavEng
    Participant

    The viper engine was designed as a ‘throw away’ E.C.U. if you friend has the engine log cards i suggest you check them throughly and find out how much if any life the engine has left. If it hasn’t any life left i wouldn’t even think about turning it over, catastrophic blade failure at high speed…not pleasant. if there is still life in the old girl a through inspection will normally suffice, just remember to prime the rear bearings before a run if the engine has been idle for more than 14days or you’ll trash the unit.

Viewing 15 posts - 16 through 30 (of 120 total)