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facthunter

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Everything posted by facthunter

  1. facthunter
    Dying in a Burning Aircraft is not the way to go. Nev
  2. facthunter
    Use colours for good visibility and staying cool in the sun. Thick paint is not for you either. It adds quite a bit of weight. Consider using a paint you can touch up , like Acrylic Lacquer. Nev
  3. facthunter
    Credit from GA subjects goes to RAAus, but not the other way around I can't see anything wrong with that. GA licences are ICAO compliant. Go To doesn't get you onto the original track. The 1 in 60 rule is good to know and apply. and glide slope uses 3000 ft height loss / for each 10 NM of distance. There's a binding rule in aviation. NEVER depend on only ONE source of information. Back it up with some other different means. Nev
  4. facthunter
    About 45 Kg's of fuel. Nev
  5. facthunter
    Lovely day and a high odds longshot winner from just near me. A few ran out of puff. Been a big deal for years. 7 women jockeys IF I recall correctly.. 90,000 spectators. I didn't wager anything. I offer people tips. DON'T BET on Horses. Nev
  6. facthunter
    To be sure you should check with the RAAus. GPS procedures using TSO'd equipment are part of an IF Rating which can be on a private licence. PIFR which is better than Night VFR by far. There is often a reluctance for checking types to DO Night VMC and I don't blame them.. RAAus take a GA bfr to cover their requirements but it may not cover 2 stroke and draggy types. Nev
  7. facthunter
    I think you would still have to do it the old way to prove you can. . Nev
  8. facthunter
    Engine run up and all checks could take 15 minutes. They had a flight engineer and he could get under a hood and check the entire Ignition system of each engine at any time. The firebomber maybe only had one pilot and a lot of stuff removed. Nev
  9. facthunter
    DC 6. Nev
  10. facthunter
    TIME is important too.. Nev
  11. facthunter
    The nature and extent of contact marks are pretty reliable evidence. Nev
  12. facthunter
    If it's any help to you I've seen aluminium produce just what you appear to have. Bits hang about in the combustion chamber and don't easily exit the exhaust port as you might intuitively expect it to. I won't post any more on this unless you ask. Nev
  13. facthunter
    Fasten your seatbelts. Nev
  14. facthunter
    It did look metallic and I doubt it's due to lead... What's your thoughts after removing it? It could be from an aluminium shaving/burr from some where upstream in the inlet or turbo. Nev
  15. facthunter
    Most engines have larger dia exhaust stems on the exhaust valves to help move the Heat. Anyone can see the weakening of the present valve stem and I'm not convinced the Sodium would make that much difference. The valve seat is the Path most heat will pass through. What price is on them? Nev
  16. facthunter
    I have since been told the MD 87 is the best model. Nev
  17. facthunter
    Did you check for bullet holes? Nev
  18. facthunter
    They have to spread to attach and remain firmly IN when in use. Pulling OR pushing. Nev
  19. facthunter
    In all of this remember the safest and easiest form of separation is VERTICALLY. and for us 100 feet is enough. 500 is better. Nev
  20. facthunter
    Those valves operate in a horizontal position so why would the bulk of the sodium be near the head of the valve?. They will cost a fortune. Time will tell if they are an improvement. By rights the stems should be of a larger diameter. The wall of the stem is too thin. With liquid cooled heads, those motors already run cooler than an aircooled motor would . Nev
  21. facthunter
    It's in liquid form and moves the heat by shaking. Works much more effectively with larger dimensions. It still ends up going to the valve guide as a heat Path. Some valve guides in alloy heads are Bronze.. Nev
  22. facthunter
    I thought you were overcome with a bout of shyness. Nev
  23. facthunter
    A curved runway is not really a problem, Downhill can be. Trees and sheds create mechanical turbulence. Nev
  24. facthunter
    Sodium wouldn't do much in small dia valve stems. It also reduces the strength of the stem because it's hollow.. Do you have good evidence of Rotax using these valves? I would expect a bit of EXTRA attention might be required with turbo charged models but the others aren't like racing car engines. Some valve stems are welded to the head by pressure and friction, which may be of something like Inconel which was used in some turbine blades I've has seats built up with Inconel as well as Stellite (tm). If you are interested , look up G&S Valves UK . They are specialists and will make anything you ask for. Some exhaust valves are nitrided but that is not deep and they usually appear black. Jus saying"I have stainless" valves doesn't MEAN anything. Stainless GALLS like no other metal and when it does it usually seizes or resembles a round file and finishes off the guide in no time. Good valves are usually SWIRL ground to reduce the likelihood of stem cracking achieve a good shape for gas flow. .Nev
  25. facthunter
    They have plenty of range and the wings flap to help them along. Nev
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