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Thruster88

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Everything posted by Thruster88

  1. Thruster88
    Please explain how aircraft in Australia with numbers on the side are not regulated.
  2. Thruster88
    Reading marko's initial post, he flew 25 hours since the rebuild but didn't say what if any oil consumption was.
  3. Thruster88
    Oil consumption would have to be very high to cause plug fouling. A Rotax 582 can eat 400ml of oil per hour no problem. Perhaps the real problem is a weak ignition, just a thought.
  4. Thruster88
    Would be interesting to see how the 912iS performs at altitude. What aircraft has that engine with a constant speed prop?
  5. Thruster88
    I looked up the pipistrel virus 121, nice performance chart in section 5.9. Ignore the KTAS, the percentage of power and fuel flow at 2,4,6,8,10,12 thousand feet is what you need. Make your own palm sized card with that data for reference while flying at altitude. Interesting how the 55% power fuel flow increases fairly dramatically as altitude increases. Carb not totally compensating, rich mixture? And engine speed (increased friction losses) to get required power at altitude.
  6. Thruster88
    No however without a performance chart like the one I posted above for the carburetor 180hp lycoming it is not possible to give advice how you should operate your aircraft with its constant speed? Or in-flight adjustable? Propeller at any given altitude. If you have an accurate fuel flow that could guide you while avoiding any low RPM/high manifold pressure limits that Rotax has published.
  7. Thruster88
    Not a good day for white shorts
  8. Thruster88
    Metres for altitude, yes of course, we wouldn't want the Chinese or Russians to feel left out.
  9. Thruster88
    AI. Would fool most .
  10. Thruster88
    I always like total control and help that don't get tired with wing removal. At work we have a platform with two screw Jack's for Cessnas or a height adjustable hospital bed for low wings. Even light wings get heavy very quickly.
  11. Thruster88
    I have always wondered about this. We know with Lycons above 7500 feet we usually have the throttle wide open (FT) as the chart I posted above shows. The Rotax 912ULS performance chart at altitude shows the 100hp engine only making about 38 hp at 7500 feet when it should be capable of approximately 75hp at that altitude. What is going on in that carburetor??? Is the chart wrong?
  12. Thruster88
    A fast plane with 2000 fpm climb rate gets up out of the hot air quickly, love the RV.
  13. Thruster88
    Skippy, your thinking is wrong, the propeller control only adjusts engine rpm, not manifold pressure. The throttle only adjusts manifold pressure, not rpm in a constant speed propeller system. There are exceptions to this outside normal climb, cruise, descent power, throttle will reduce rpm during landing etc. It would be nice if Rotax published a comprehensive chart like the one above for the 912, showing 75%, 65%, 55% power and how that can be achieved for a given altitude if a constant speed propeller is used.
  14. Thruster88
    You certainly can reduce the rpm to 5200 WOT using the prop control, however this will be a much higher power setting than the fixed propeller doing 5200. The difference will be the amount of manifold pressure which is controlled with throttle. This power chart for a lycoming shows multiple combinations of manifold pressure and rpm to get the same power and hence fuel flow. 3 fuel/power settings are shown in the chart. All piston engines behave the same way.
  15. Thruster88
    Thrusters have a 4inch main tube, no doublers but it is well braced .
  16. Thruster88
    I agree you can get 14 lph but don't call it 75% power. The rotax charts that Blue posted show the fuel consumption at 75% which rotax say is only 68hp, weird maths if you ask me but anyway that is 18.5lph. The altitude chart is very informative.
  17. Thruster88
    Skippy you need to use a calculator. 75% of the 100% fuel flow will be 0.75x27 lph = 20.25. L 5000rpm will only be 75% power if the propeller loads the engine to 75% and this will only be correct for one altitude. 5000rpm at 2500 feet is much more power than 5000rpm at 7500 feet. Performance charts for any aircraft will only be correct if the factory propeller is fitted. If the propeller is ground adjustable all bets are off.
  18. Thruster88
    Mike, I believe the aircraft above was bought by a guy in central West NSW. Was an un flown prototype?
  19. Thruster88
    You could drill a hole into which the plastic over flow tube would fit tightly. Can cut the tube at an angle so it can be pulled through then cut off. Some slack in the tube will allow the cap to be removed.
  20. Thruster88
    Cross out "are trying to produce" and replace it with HAVE PRODUCED. Impediments to this, Lawyers, vested interests, useless government.
  21. Thruster88
    Interesting to see the exhaust early in the vid. Looked stock Rotax, no dual expansion chambers. The exhaust was wrapped maybe to minimise cooling drag and maximise exhaust thrust, every bit helps. The 582 tuned up could produce 100hp given it's displacement.
  22. Thruster88
    Would be nice if we could have something like this. Never happen in Australia. LA Special Flight Rules WWW.AOPA.ORG Want to fly over one of the world’s busiest airports without talking to ATC?
  23. Thruster88
    This happened on the apron at cowra on a low wind day a few years ago. Pilots left the aircraft for a short time. Empty weight about 430kg for the piper colt.
  24. Thruster88
    I guess the real question is if everything went to plan and the two aircraft missed by 100 feet would this be acceptable. No is the answer.
  25. Thruster88
    Will you use ripper, the Gallion stallion in your gold prospecting after building the runway? I believe metal detection people use them to strip off the surface layer.
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