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apm

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Everything posted by apm

  1. apm
    Yeah, but some have gone too far in lowering the clarity of transmissions.
  2. apm
    Interesting read, seems to be a desk audit of old info and just says more research i required(scientists always say that even when they come to a conclusion). So its still a possibility to achieve.
  3. apm
    Never said to run the rotary as a diesel cycle, its a spark ignition engine. And you can spark ignite JetA, Its how the turbines operate. The PT6's run just fine with compressor ratio of 6.3 in early models and 10.8 in later and igniters to light the kero.
  4. apm
    Yeah probably best for low drag airframes, the rotary is naturally multi fuel, but spark ignited, not compression ignition. Just current car conversion variants are optimized for ulp.
  5. apm
    The 40hp version with smaller/lighter generator & running at 100% continious with battery assist for TO/climb would compare with a direct driven IC RAA aircraft. a rotary is most efficient at redline and will sit there all day so is ideal in this combo. Will be noisier than just electric but much more endurance. Plus will run on JetA1, how cool would that be to line up with the turbines for your gogo juice.
  6. apm
    Yeah, could be right, But not all recreational pilots operate within the RAA limitations.
  7. apm
    For my next build, I'm planning to go hybrid. Thinking of something like an AIE engine connected to a YASA generator, the engines flywheel,starter motor & alternator would not be needed as generator provides these functions. 2 YASA motors pancaked together but counter rotating driving counter rotating fixed pitch props, Just enough batteries to help for TO and climb to alt then cruise on engine alone. Re-gen the batteries on descent. Would be compact, run on multi fuel, lighter & more endurance than pure electric. And lighter weight to my current setup of mazda 13b+gearbox+CS prop. What you think? Andrew.
  8. apm
    Geoff, this is how my business is setup, you pay more to your accountant but save in less or none to insurance, A Company is limited liability to its assets so keep it low, & make sure all correspondence is on your company letterhead. talk to your accountant before getting advice from your lawyer. Andrew
  9. apm
    Just attended a CASA avsafety meeting, this issue was discused where they pointed out that still 1 day for submissions and asked for those who have not made a submission to do so, said it will take at least a couple of months to go through the results. this latest CAAP is just reiterating current law. true. But if you have a radio it is supposed to be working and monitoring the published frequency.
  10. apm
    CAAP 166-01 ver4.1 released today Andrew
  11. apm
    In my opinion a VFD is the best way to run small 3phase motors from single phase, as a side benefit they provide precise control of the machine. Andrew
  12. apm

    IMG_1026

    apm commented on apm's gallery image in Engines, Props & Avionics

    IMG_1026
    [uSER=13619]@rmorton[/uSER] no. full ibox version. only really posted picture due to an enquiry from a potential sp4000 builder.
  13. apm
    Bexrbetter, I think you should stick to your original design goals. Filter the comments for what they're worth, I dont think your market is with the typical forum member, maybe initially it is for a few kits, but most of us are flying and have strong opinions based on aircraft previously available. You have an oportunity to improve on past practices, so use materials where needed that are very efficient to manufacture, easy to build & safe to fly.
  14. apm
    I've known a couple of Lycoming's that if filled full will promptly throw a couple of quarts out then settle down to normal oil use. If next pilot checks oil & decides its low, adds a quart. Process is repeated. I just put it down wrong dipstick. Had a case here where a pilot was distracted during preflight, forgot to tighten dipstick then proceeded to do an aerobatic routine, returned with very little oil in the sump, now that was messy, but lesson learnt.
  15. apm
    Hmmm. Maybe I'm abnormal then! My plane has chromemoly frame, fiberglass skin & control surfaces, aluminium wings, timber floor, even some fabric under the rear fuselage. To top it off I built the engine, a 200hp rotary & built in tip tanks for total 210 litres. I was talked out of carving a prop though, but not next time!! Suppose its the diference between builders who enjoy the process and those with no confidence in learning skills. Andrew Lightwing SP4000
  16. apm
    Broadcasting intentions to a Unicom is the failure here. Positive communication between PIC's with a possible conflict is the key.
  17. apm
    Good idea, Pity its FB. do have account but only look at it a couple of times/year, too much crap from my "friends". any chance you could post here also?
  18. apm
    Here's an idea. For next years Ozkosh, get airservices to put in a temporary tower with friendly controllers for the weekend. Have a couple of instructors in there also for those pilots that turn up a little unsure of the proceedures (descrete freq's for those struggling to communicate) to help them in. Run it as a competition where those that do well recieve a CTA endorsement. Those that dont, no penalty, but maybe a "visit the tower" request for a debrief. Would be a good experience for all. Ken, I encourage you to lodge an airprox incident report. If the twin pilot is commercial, he would have already done so, be good if its not a one sided report.
  19. apm
    My problem is not whether the twin had right of way or not, rather that from Kenny's description the twin pilot communicating with the unicom rather than establishing radio contact with each aircraft in the area prior to declaring a straight in approach. Good airmanship would suggest the twin pilot would want to be very aware of where every other aircraft was and their intentions. Seems to me the unicom was being used as a quasi controller, not very smart.
  20. apm
    Well. I'll be damned then, I still don't know when it starts. She said AEST, but guessing she meant Canberra time, whatever that is. If anyone actually knows, can you please post it in Zulu time.
  21. apm
    Just a FYI, anyone wanting to attend the RAAus AGM or watch by live stream as notified to members. Seems RAAus has its own time conventions. Place is Aldinga SA but time is AEST, just confirmed by the CEO's PA, Kelly. I have suggested they use Zulu time in future to avoid confusion. Andrew
  22. apm
    unless an airfield has a published freq. area is used.
  23. apm
    Kenny, yourself and your freind need to complete incident reports. From your description the twin should have given way and gone around, not your friend. CTAF rules apply. Next time that pilot pulls that stunt the result may end up diferently, on your conscience if you dont report. Andrew
  24. apm
    Don No compulsory stage checks with SAAA for many years now, and rightly so. Most of us that have built planes do voluntarily ask other builders, LAME's etc to check our work. the build quality is 100% the responsibility of the builder, By adding compulsory stage checks the inspector assumes responsibility for signing off on work done. this only happens when large sums are exchanged for the inspector to cover their liability. Andrew
  25. apm
    loss of oil pressure at 2500', during approach into selected paddock engine stopped, plane unable to make clearing and landed in a tree, ruptured both fuel tanks. lots of very small paddocks & big trees in that area. unlucky engine stopped when it did, very lucky there was no fire.
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