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nomadpete

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Everything posted by nomadpete

  1. nomadpete
    Thanks for a number, Skippy. As a starting point I plan to put a air temp probe under the cowl. And in the exit stream. That will give an idea of what is happening. Any other ideas?
  2. nomadpete
    Back to ruskie drone engines (and US humvees), I recall that the WW2 americano Jeep was designed with a service life of a handful of hours. But SOME are still in use 80 years later. The fact that a military version is thrown together in haste does not condemn that maker. That particular product IS fit for purpose at that time. It doesn't prove that everything they make is crap (even though it MIGHT be) Anyway, I wouldn't fly behind any Rusky or china copy of a known reliable engine.
  3. nomadpete
    Except, few builders will exactly copy an airflow tested cowling. This is no criticism of any builder. Least of all Marty. Obviously, lacking a wind tunnel to assist airflow assessment, the best we can do is ground run, and reserve final judgement until actual real ground runs, and assuming promising results, actual takeoff. If we still harbour doubts, we can temporarily fit extra temp probes, and even airflow measurements. Affordable instruments are now at a level only dreamed of in the past.
  4. nomadpete
    What part of "may" did you not understand?
  5. nomadpete
    Point taken. Thanks. With outside ambient temp around 16 and engine only running at about 2500 rpm and cowlings off, we were happy to just get the head temperatures up off the stops. Accuracy of readings are yet to be confirmed. Realistic temps might be seen on full power ground runs.
  6. nomadpete

    Northrop Alpha

    nomadpete commented on red750's aircraft in Airliners

    That unfortunate pilot. Sitting out in the weather, navigating with a paper chart on his lap. And so far back that he must have landed by braille. The view whilst taxying... well there isn't one. Gotta admire the skill of those pilots!
  7. nomadpete
    Goes around the horizontal stab.... eventually.
  8. nomadpete
    A very sad outcome. Condolences to family and friends.
  9. nomadpete
    Here's one for you....
  10. nomadpete
    I am so glad there are 15 reasons! After all the girls could only find 10 reasons why a cucumber is better than a man.
  11. nomadpete
    Fire work takes a special skillset. Low level work (treetops), precision drops, localised crazy wind shifts.... must be exhausting work. Pic of heli work on a fireground I attended last summer. We were often looking down on the choppers! They could drop accurately within metres of us.
  12. nomadpete
    I was sailing past Margate, watching the flying circus. Very impressive piloting. There were times when four aircraft were skimming the water, loading on the run. Spray everywhere. Not sure but I heard that they drop about 1200kg at a time. The rate of climb was not looking impressive with a load.
  13. nomadpete

    DFS SG 38 Schulgleiter

    nomadpete commented on red750's aircraft in Gliders

    There is still one of these remaining on the Darling Downs. Built in 1931 (?) And flown by several generations of the same family.
  14. nomadpete
    When I replaced my stator assembly, it was clearly labelled 'Ducati'. No idea which ducati, though.
  15. nomadpete
    The wiring loom was premade. It already has labels on the wires, but since it was premade for a different aircraft, mods must be made to suit a different layout, and some different items. It is messy at the moment, but eventually will be neat and secure.
  16. nomadpete
    Geoff, switchyard back EMF involves spikes several orders of magnitude greater than any tiddly little 12volt solenoids or starter motors. When a switchyard circuit breaker trips there may be 330,000 volts and thousands of amps at play. Nevertheless we should be protecting our fragile and personally expensive electronics on our aircraft. Especially when it is so simple to do.
  17. nomadpete
    Thanks for the post. I have never alluded to being a great aviator, or even being particulaly good. But having watched that Oshkosh video I feel a little better about my flying. These flying applianes do not often arrive back on terra firma as gracefully as we wish them to.
  18. nomadpete
    PS Do they still fit a dkhead diode across the dc supply inside radios? In the old days of CB radio, they were common, and would at least suppress the negative going spikes.
  19. nomadpete
    Very nice CRO pics. Have you looked at the current associated with those spikes? Personally, although I love protection diodes or TVS, I would be tempted to wire a fusible link or fuse in series with it - although failures are rare, the consequence of a short suddenly occurring across your solenoid would be unpleasant. (Such addition would have to be monitored)
  20. nomadpete
    So that's why we can't get good wine here any more. We send it away for all youse foreigners to enjoy.
  21. nomadpete
    I forgive you, Geoff.
  22. nomadpete
    Digressing, but when the first of those CT's exploded in Qld, nobody knew why, but someone reported an increase in RF noise in their AM radio. So, I ended up wandering around HV switchyards nervously aimimg a alloy yagi antenna at CT's, looking for the rising RF that might indicate impending explosion. My apprentice followed me to carry the spectrum analyser. The engineer who thought this was a good idea, stayed in his cosy safe office.
  23. nomadpete
    Here's another one - we also have live line workers in Australia, too.
  24. nomadpete
    Wow! Lucky man! Happy Birthday! Gee, that would look great on the front of an aeroplane.
  25. nomadpete
    My goodness, is that what it does to you? No wonder I look young for my age.
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