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walrus

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Everything posted by walrus

  1. walrus
    “GPS Assisted” collisions are real. Never, ever fly “direct to” using airports as waypoints because by definition anyone on the reciprocal will track within 50 metres or less of you. Hemisphere]ical altitudes aren’t much help either. Always use offset waypoints or “wander” a bit.
  2. walrus
    K5054, you need to change your plumbing so that the orifice line bleed takeoff is not between the cube and the carburettors. I made that mistake.
  3. walrus
    I fitted a Dynon ADSB-IN receiver a few weeks ago. I already have a transponder. First flight with the new unit, I saw a target on the Dynon screen. I was going North, the target was heading South. It was on screen for no more than three seconds. Passing distance was about half a mile. I was surprised by the speed of closure and lack of time to respond. I didn’t have a hope in hell of seeing it. i suspect it was an RV whatsit and the closure speed must have been 200 + knots. More technology please.
  4. walrus
    Unfortunately there is nothing I am aware of to stop determined terrorists from taking control of an RPT aircraft at any regional airport, ASIC cards or no ASIC cards. I qualified that as being "aware of" because I sure as hell can't see any effective deterrents. I was taught in the army that an obstacle isn't an obstacle unless its covered by fire. I suggest that the same dictum applies to security precautions. What are you going to do when you find someone on the strip with no ASIC card?
  5. walrus
    As with everything it is LOGISTICS that counts be it Covid19 or electric vehicles. In fact electric powered vehicles can easily be more versatile and higher performance than IC engine vehicles - and that includes (propeller) aircraft. The problem is the logistics of getting volts and amps to the motor - ie batteries, fuel cells or storage media. Power generation and distribution. The example quoted to me was Britian - it uses something like 1 TwH annually for domestic use and 2 TwH for transport in the form of liquid fuels. So you see the scale of the problem - triple electric energy production and distribution to replace liquid hydrocarbons. Visit any petrol station on the Hume or Pacific freeways. Look at the volume of traffic at the pumps. Now imagine if each has to take 30 minutes to charge. Can you see the problem? Then can you see the size of the mega voltage, ultra high amperage power lines joining each station to some super power station? We don't have the grid technology, battery technology, network topology let alone operating rules, legal, financial or safety infrastructure.......yet
  6. walrus
    you are not even allowed to fly over fraser, let alone land. https://parks.des.qld.gov.au/__data/assets/pdf_file/0031/167962/op-pk-vm-landing-recreational-craft-qpws-managed-areas.pdf
  7. walrus
    RF I'll check next week and report back. There do not seem to be any other radio or intercom issues.
  8. walrus
    RF, radios are on, they feed through the intercom panel. Its not alternator noise that varies with load, metal airframe. Everything grounded and shielded, no strobe noise, etc.. Not affected by frequency or squelch. No hiss. Just tapocka, tapocka, tapocka when i touch the metal throttle shaft (not the bakelite knob).. I will check grounding of the throttle body butterfly shaft. The body is attached to the airbox and that has rubber connectors to the inlet manifold, so the grounding of the airbox/throttle body may be the culprit. How sweet it would be to go "achtung" to the little Rotax elves in the black forest and point out an issue to these superior beings. Apart from this, I can't fault the engine.
  9. walrus
    Jab, Yes, I have grounded the engine block to the airframe. You raise a good question about the grounding of the throttle. I think it is grounded through attachment to the butterfly on the throttle body but I will check.
  10. walrus
    Facts and Jab. The noise occurs only when I touch the metal throttle shaft. The knob is insulated and there is no noise when I touch it, nor is there any noise when I touch other metalwork. The noise is coming from a running engine only. On the 912 iS, the throttle cable is pretty close to the wiring loom and I suspect "crosstalk". The outer case and inner wire are grounded to the throttle body on the inlet manifold. What I have not yet checked is the ground between throttle body and airframe. The 912 iS also has two electrical systems for redundancy that have separate grounds, so I am not sure if that is a contributing factor. Its a nuisance more than anything, but its annoying.
  11. walrus
    That could work but on reflection, I like a small screw now and then.
  12. walrus
    I've tried an alligator clip to my ear but it interferes with the headphones.
  13. walrus
    I don't know where this subject belongs, so I'll try here. I have Bose noise cancelling headphones connected to a Dynon intercom. I have a fuel injected Rotax 9912 iS engine. Whenever I touch the metal shaft of the throttle, I get ignition noise in my headphones. Otherwise there is no noise from strobes, lights, etc. As far as I can tell everything is grounded as it should be What is going on?
  14. walrus
    Pity the rest of AUstralia - whose taxes pay for the RAAF, don't get to see the display.....just the leeches in Canberra.
  15. walrus
    Just watched a Youtube video of the factory test pilot demonstrating stalls in a Bristell. By his own words each recovery took of the order of four hundred feet and the video shows a wing drop on each stall. 400' is too much compared to the GA standard for a C172/ PA28 of one hundred feet altitude loss. Such a loss also means that an error in recovering the dropped wing at circuit height is going to be fatal because it will delay recovery if not stimulate an incipient spin.. In my opinion and I'm not an expert, this is not an ab initio trainer by any stretch of the imagination.
  16. walrus
    Just so you guys know...... At least one state -Victoria, has legislation where a GP can refer a car driver for a medical review of their drivers licence after an accident or injury, even if the injury is not related to driving a vehicle. My friends in the Police tell me that the pass rate for such reviews is effectively zero. The answer is almost always NO to keeping your licence. This is basically the avoidance of liability by the reviewing medical authority. Draw your own conclusions about the effect of this behaviour and Avmed's on the creation and maintenance of an effective safety culture.
  17. walrus
    To be fair to CASA, they are also in a difficult situation because they are caught in a historical bind as well as being on the horns of a dilemma. The historical bind is their program of regulatory reform and its cost and results. Sooner or later someone in government is going to perform a cost benefit analysis and conclude it’s a zero sum game. The dilemma is simple. You cannot write prescriptive regulations that efffectively micromanage while at the same time claiming you have no liability for outcomes.
  18. walrus
    I am no expert but that description of Bristell oscillation with flaps down sounds like neutral longitudinal stability, however the maths of stability and control does my head in. However i’m not sure that such a condition is disqualifying at close to 1.2 - 1.3 Vs. The C172N has something like that mentioned in the POH in side slips.
  19. walrus
    From reading Facebook and other websites, it is alleged that RAAust has been involved in the disagreement between Bristell and CASA over the spinning characteristics of Bristell aircraft. I hope, if the allegation is true, that RAAust involvement was regarded as constructive. Is any statement forthcoming from our Board on this matter?
  20. walrus
    the idea is to get 3000+ raa aircraft to pay air navigation charges. As always, follow the money!
  21. walrus
    "Tell us what equipment you have so that we can use the data to *&*& you over some more......"
  22. walrus
    I'm afraid this proposal must be rejected because you can't trust AsA, let alone CASA. The devil is in the detail. We could be totally shut out of the Airspace concerned. For example access is allowed, in theory, to "appropriately equipped" VFR aircraft. What does that actually mean? Who decides what is appropriate? At present for example, the use of ADSB for separation, which AsA is keen on, requires at least a $4000 TSO'd GPS source. Skyecho cant do it.
  23. walrus
    We don't have WAAS in Australia.
  24. walrus
    I have a number of friends who are caught by this and similar catch 22"s. Workcover, transport, etc. legislation all have this get out ; " If you don't meet the standards or have a medical episode, you will have to be reviewed" ....and the result of that review is always a big fat "No". For example, the pass rate for drivers licence medical reviews after illness or injury is zero in Victoria.
  25. walrus
    The idea of using AGL as the floor of Class E is utter rubbish for one reason: Because that Class E Floor is by definition, not a smooth continuous surface. It mirrors that landscape. Think about that not from an RAA perspective but from an IFR, RPT or charter perspective - can you actually use the lower levels of such airspace? The answer is of course not because you need consistent altitudes or your navigation task is impossible. Can you imagine a controller saying: "Maintain 2000 AGL till Doncaster"?
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