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Recent content by verymadmac

  1. verymadmac

    Air India 787 crashes on take off

    I have found SAIBs to be an interesting source of information, they cover a much broader range of items that you see covered by AD (my favorite being one stating you can't prove compliance to FAR 23 by copying an existing type certified design). But a its not uncommon for items get elevated from...
  2. verymadmac

    what's mine is mine, what's yours is mine ?

    Wil, you forget the classic Boeing C-47 which gets a bit confusing with the Boeing CH-47. So what aircraft has been produced under the largest number of company names? I would suggest possibly a Beechcraft twin: Beechcraft to Raytheon, then Hawker Beechcraft before back to Beechcraft owned by...
  3. verymadmac

    Tesla Cybertruck fire and alleged design flaw. . .

    If you place an "emergency release" where it can't be found in an emergency by the average user perhaps its technically just a "manual release cable". And manual here appears to refer to the need to use the manual to find its location and its mode of operation.
  4. verymadmac

    what's mine is mine, what's yours is mine ?

    Interesting, putting the 515 into production would have required building a not insignificant capacity regarding restoring older design and associated data to modern production standards. Rolling straight into another design / production restoration would make sense, in terms of reducing the...
  5. 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...
  6. 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
  7. 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).
  8. 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...
  9. 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...
  10. 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...
  11. 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...
  12. 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...
  13. 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...
  14. 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).
  15. 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...
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