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  1. verymadmac

    Trump announces Boeing wins contract for next-generation fighter jet... F-47??? Say-What????

    I wonder if the F-47 actually derives from the F-7 concept that was put about a couple of years go. Would be a nice cover story (building an F-7 mockup) for having T-7 gear / engines shipped to an otherwise unexpected location. Plus nothing like letting a design team go shopping from an...
  2. verymadmac

    Anyone have a copy of British Standard EN29543?

    This link appears to indicate that ISO9453 maybe equivalent, it also provides a cross reference chart. https://www.farnell.com/datasheets/1377394.pdf
  3. verymadmac

    Trump announces Boeing wins contract for next-generation fighter jet... F-47??? Say-What????

    A-10 was Thunderbolt II, so maybe Thunderbolt III maybe. Looks like a warmed up Bird of Prey, although with the F-47 designation its should be, about 120,000 lbs gross*. * for those that don't know the P-47 was rather large and heavy compared to period competitors (20% maybe).
  4. verymadmac

    Future Fighters ?

    I guess this makes Dassault the premier fighter builder in Europe they will / are laughing all the way to the bank, I guess they will take lead on Europes 6th gen unless we see something like a radical UAV fighter come out of Ukraine that forms the basis for a rapid 6th gen. For those countrys...
  5. verymadmac

    Vertiport regs for windspeeds

    A quick google suggests that Joby S4 (~9.4 lb/ft^2) is a bit more than the disc loading of a CH-47 (8.8 lb /FT^2). In practical terms a CH47 downwash isn't remotely the same as an R44. CH-47 downwash Its still a long way from a V-22 at 26.68 lb/ft^2...
  6. verymadmac

    PW1500G engine failure A220 swiss

    That is a pretty nasty incident. I see the flightcrew were part of the five crew hospitalized, at Fl400 is one of the flight crew required to be wearing a mask? Mild tangent, year ago I is testing a modification on a metroliner cabin air system where we blocked up all the cabin vents to force...
  7. verymadmac

    Windrunner

    I would guess the non dynamic structure is largely cheaper than dynamic structure i.e more tower is cheaper to build than building more blades. With respect to the number of blades, the power output isn't constant even before one considers the effects of the blades as the wind isn't constant...
  8. verymadmac

    Windrunner

    It was a 33m diameter windturbine (timber laminate blades), the blades where more like a 2 bladed helicopter rotor than a normal propeller. They had a bit of a learning curve with the first unit when a gust / controller configuration issue cause the whole thing to be almost pulled off the top of...
  9. verymadmac

    DHL 737-400 crash

    A company I worked for, had one of this aircraft sister ships they were well looked after by Qantas. There were in much better condition than any 737 classic we brought out of the USA, with a very comprehensive cockpit fit out. I wonder if it had one of those pencil whipped eastern European...
  10. verymadmac

    Windrunner

    Last time I discussed this with a wind turbine manufactures Chief Engineer, the comment was that the biggest appeal of 3 blades is that they were visually more appealing than 2 blades (he was in the process of building the first article of a 2 bladed wind turbine program).
  11. verymadmac

    Windrunner

    Well there appears to be a market for big slow cheap transport aircraft but this doesn't appear to be it. Although more for opening up transport options in the frozen north (or the not so frozen north now days). Why would you use turbofans for this, you are not going to pressurize it, you don't...
  12. verymadmac

    Fasteners codes

    They are not a Boeing part, they are called hiloks, the spec sheets are online https://www.jet-tek.com/hi-tigue-pins/hl326.php
  13. verymadmac

    WOW !! ... from Flight today ...

    But did the purchase price include engines, rotatables, etc. Once leasing companys are involved you got to ask did they buy the whole aircraft or just most of it!
  14. verymadmac

    Too many bolts removed from pylon footings

    Transpower chief executive Alison Andrew says a power pylon that fell last Thursday was due to contractors removing too many nuts I guess someone read the work order wrong. https://www.rnz.co.nz/news/national/520400/transpower-makes-announcement-after-major-northland-outage
  15. verymadmac

    William (Bill) Anders

    A company I worked for, the Chief pilot retired from a National Airline at 60, and then spent the next 20 years being chief Pilot for a freight airline, before actually retiring from commercial aviation (No APTL age limit here).
  16. verymadmac

    Dynafocal

    Who's Dyna-focal mounts is the aircraft using. Have you tried asking Lord nicely for dynafocal installation drawing for the specific engine. Here's one for a O540 & IO540 https://res.cloudinary.com/engineering-com/image/upload/v1718496187/tips/S-6323_ncttx2.tiff
  17. verymadmac

    Electric powerplants ...

    Yip, but at the rate of technology change for the aeronautics industry that point in time, 15 to 20 years was a very long time. The quoted textbook was obsolete within a decade, while ones printed in 1935 still contrubes significantly to industry now (bruhn comes to mind).
  18. verymadmac

    Electric powerplants ...

    Somewhere I have an aero textbook from the early 1920's it comments that gasoline engines are a horrible fire risk, but it is expected that it will be replaced by diesel engines in the next few years. Hmmm for Harbour Air, I wonder if the numbers would look any worse using a boilerless steam...
  19. verymadmac

    Looking for the Royal Aeronautic Society Data Sheets from the 1940s.

    RAeS has the National Aerospace Library in the UK, https://www.aerosociety.com/news-expertise/national-aerospace-library/library-catalogue/ library search function https://raes.soutron.net/Portal/Default/en-GB/Search/SimpleSearch
  20. verymadmac

    23.603(b) Workmanship must be of a high standard.

    I just refer to the governing approval of those manufacturing it and installing it i.e. Workmanship is of a high standard as it is manufactured / installed by part 145 organisation.

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