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cscotthendry

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Everything posted by cscotthendry

  1. Especially when a party lies its way into power. There are those who say Gillard lied, but she said "Let me be clear, I will put a price on carbon". Whereas Abbott said "No cuts to health, no cuts to education, no changes to pensions and no cuts to the ABC or SBS" and then went back on every single one.
  2. The trouble is FT, that when zealots take over, they are hard to displace BECAUSE they are zealots. Normal rational beings aren't as fervent or as willing to engage in brinkmanship and so are at a disadvantage. The thing about zealots is that they are often driven by fear and seek the protection of the "herd" and so act as a bloc, which in itself makes them a formidable force to overcome. They view this behavior as "strength", but that strength can be (and all too often is) used for negative purposes.
  3. Dan: Measuring the resistance across the trigger coils without unplugging them won't really tell you anything as you can't know what circuitry is inside the ignition boxes that you're also measuring that way. Even though it's a pain, it will be more meaningful if you unplug the connectors on the ignition boxes and re-measure the trigger coils to compare with the tacho coil. Having said that a multi-mega ohm resistance across the tacho pickup sounds high. I seem to recall som Rotax troubleshooting tips somewhere, either from the manuals or from Rotax Owner. Maybe have a look at those places for help also. Another thing to try is to connect your ohm meter across the wires of the tacho pickup coil, at the gauge end and then start wiggling the wires between the pickup and the tacho. If there is a broken wire somewhere, this may show it up. For this kind of test, an analog meter is best as the digital ones jump around in the readings mostly and it can sometimes confuse the readings. On an analog meter you will see large movements of the pointer if you have a broken wire. I'm not quite sure what you were measuring when you were measuring across the gang connector on the firewall, so I can't comment on that. The DC measurements from the tacho pickup are meaningless. The AC measurements sound a bit low to me, but explain why you didn't see any tacho reading until a certain speed with the diode in the circuit. A 1N4004 diode is a silicon diode that requires about 0.7 volts before it conducts. When you had the diode one way, it completely blocked the signal in the polarity the tacho gauge needs, in the other polarity it blocked the signal until the signal reached the forward bias level required to make the diode conduct. This experiment only confirms the AC voltage readings you took. Given that the resistor across the tacho leads did not work, my best guess would either be a faulty pickup coil, a broken wire in the path from coil to gauge, or a faulty gauge. My strongest suspicion would be a broken wire between the pickup coil and the firewall. This is where the maximum flexing occurs in the wires due to the engine moving on its mounts. HTH
  4. The Glass House Mountains in QLD Mt Beerwah Mt Tibrogargan Mt Coonowrin
  5. If it's a handheld radio, maybe also check the state of the battery. Also, how are you communicating with the radio? If you have a headset plugged in, does the radio have a mic gain setting? If there's not enough audio drive from the mic, the modulation level on transmit could be insufficient. If you're just speaking into the speaker as you would use a handheld on the ground, the voice input may be insufficient to overcome the cockpit noise in your transmissions. Does your aircraft have a metal frame? You are correct in assuming that any metal between the antenna and whoever is receiving your transmission will affect the signal strength at the receiving end, but I think more likely is lack of modulation of the output rather than the received signal strength.
  6. OK, this is great news. Now OzRunways, can we have charts etc for other units, like the AvMap EKP series too? ... Please! The Jeppesen updates are poisonously expensive.
  7. Correctamundo. The military industrial complex needs to foment perpetual war to keep the profits rolling and they will do ANYTHING to do that. Recently I saw an article about perfectly serviceable F-16's being rigged for remote control so that fighter pilots could shoot them down for target practice! I'll bet there were a few well oiled guffaws at the "gentlemens" clubs over that little ploy to sell more hardware.
  8. The war criminals Bush, Blair and Howard created this mess by militarily taking another country apart under false pretences. Now the geniuses that run the country and the military industrial complex are saying that doing more of the same will fix the problems. It seems to me that all that military intervention has done so far is act as a recruiting call for more people to join IS. There's a definition of insanity as "doing the same thing over and over and expecting a different result". I agree that the Middle East is badly broken, but will more military action fix it, or just make us even more hated by them and create more refugees?
  9. On Rotax engines, the tacho signal is generated with an inductive coil. If the coil is not loaded enough it can generate quite high voltage pulses which can cause problems with electronic tachos. The solution is quite simple. put a small value resistor (around 220Ohms ACROSS the outputs of the pickup (not in series). Typically, one lead of the pickup is connected to the signal input of the tacho and the other lead is connected to ground. However the pickup is wired to your tacho, putting the resistor across these two leads should solve your crazy tacho problem.
  10. On Rotax engines, the tacho signal is generated with an inductive coil. If the coil is not loaded enough it can generate quite high voltage pulses which can cause problems with electronic tachos. The solution is quite simple. put a small value resistor (around 220Ohms ACROSS the outputs of the pickup (not in series). Typically, one lead of the pickup is connected to the signal input of the tacho and the other lead is connected to ground. However the pickup is wired to your tacho, putting the resistor across these two leads should solve your crazy tacho problem.
  11. Mike: Just over a week to go now till the new arrival. I will have a look at that material at clark's. Thnx for the tip.
  12. Mike: Just over a week to go now till the new arrival. I will have a look at that material at clark's. Thnx for the tip.
  13. Mike: It's hard to tell whether you have it or not from the pictures, but some kind of brace on the throttle tube where the cable control arm attaches would be useful. That long crosswise tube will flex more than you'd expect under the force of pulling the two carbies and the friction in the cables.
  14. Mike: It's hard to tell whether you have it or not from the pictures, but some kind of brace on the throttle tube where the cable control arm attaches would be useful. That long crosswise tube will flex more than you'd expect under the force of pulling the two carbies and the friction in the cables.
  15. There is a height (forget the figure just now) where a geostationary orbit is possible. If the tower went to that height it should be possible to just step off at the top and you're in orbit. The trouble I think is the forces on all the stuff below that height. If I knew more about orbital dynamics I could explain ... but I don't, so I can't. Ooops, just noticed the post above.
  16. There is a height (forget the figure just now) where a geostationary orbit is possible. If the tower went to that height it should be possible to just step off at the top and you're in orbit. The trouble I think is the forces on all the stuff below that height. If I knew more about orbital dynamics I could explain ... but I don't, so I can't. Ooops, just noticed the post above.
  17. I wonder if GG saw the "humour" in that. If not, is he one of the "protected species" he mentioned?
  18. I wonder if GG saw the "humour" in that. If not, is he one of the "protected species" he mentioned?
  19. Oh and one other thing I really disliked about the plane. The airplane was a composite which included composite main gear legs. The brake lines running from the fuselage to the brakes ran down the trailing edge of the legs as they do on most light airplanes, but these were attached with nailed on cable clips! That's right, they hammered nails into the composite landing gear legs ...Errk!
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