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Cyrano

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Everything posted by Cyrano

  1. Cyrano
    The speed of sound is purely a function of air temperature. So if you are on the ground in Siberia at minus 60 degrees celsius the speed is the same as minus 60 degrees at say 40,000'. From memory the formula is: 38pointsomething x the square root of the absolute temperature. Absolute temp being zero at ~minus 273°. Your Mno is the ratio of your true airspeed/local Mno. At sea level and ISA (+15°C) at 250kts indicated your TAS is 250kts and the Mno is 250/661~0.38M. As you climb out at 250IAS your TAS will progressively increase (eg+16%@10,000') as the air DENSITY decreases. Assuming a standard atmosphere the local speed of sound will decrease with temperature until it is ~573kts@36,090'-the tropopause where the standard temp is -56.5°C. Typically in the cruise the numbers you will see might be: 36,000'/245KIAS/M0.78/460KTAS There is a lot more to the story but I won't bore you with that.
  2. Cyrano
    I think ATC gave them a new route to that planned (perhaps MIL airspace) thus the reason for the full readback. In AUS (including WA...! ) If the flight were as planned then only the initial waypoint that joins the airway is needed eg ATC, "N6BX cleared to Sydney via SEDAN, flight planned route. SEDAN2 departure, climb via the SID 5,000, Squawk 3414, departure freq 118.2 You read it all back and give your parking position at the end. If you are fancy enough to get a PDC the only readback is SID , Squawk code and parking position.
  3. Cyrano
    Yes, you are correct but that is not what was said. An erroneous RA signal earlier on the approach can command the auto thrust to idle thinking it is in the flare.
  4. Cyrano
    As mentioned the 5G can interfere with radio altimeters on aircraft. Usually there are two fitted. So what you might say but the RADALT signal is intergrated into many aircraft systems. For example it changes the sensitivity to the ILS signal as you get closer to the ground. If both radalts are unserviceable the approach must be flown manually (Airbus) as the autopilot will not receive correct commands as altitude reduces. During autoland operations in low visibility it commands the engine thrust to idle during the flare. If interference occurred from a 5G signal the engines could go to idle at say 2,000' thinking it were in the flare. There are dozens of other potential problems but the above gives a taste of the issues! http://www.alpa.org/resources/aircraft-operations-radar-altimeter-interference-5G#:~:text=Radar altimeter interference from 5G signals can take the form,1951 in Amsterdam in 2009.
  5. Cyrano
    How is your aircraft progressing mate? Looks good!
  6. Cyrano
    Yes, there are logistical issues that are NOT insurmountable. What ever the issues it would be a lot smarter than the current situation of utilising a dodgy hotel in a capital city.
  7. Cyrano
    Why not use it as a quarantine centre?
  8. Cyrano
    Are you sure they are olive trees. Some where near Griffith 🙂
  9. Cyrano
    In the early 80's there was a mosquito (ultralight) at Forbes aerodrome in the eastern shed. Anyone know it's history?
  10. Cyrano
    Did Trevor sponsor you with free beers at his pub?
  11. Cyrano
    There were two cows chatting to each other in the pasture. One says to the other, " hey, are you concerned about catching mad cow disease?". The other replys, "why should I be worried? I'm a helicopter!!"
  12. Cyrano
    This B727 is a home. https://www.awesomeinventions.com/boeing-727-conversion-home/
  13. Cyrano
    I was at a quiz night recently. A question was, who were the first aviators to fly across the Atlantic. Someone from the crowd yelled, "Sammy Davis jr!!". The quiz master replied ,"don't be silly it was Alcock and Brown". Yes, thats what I said-Sammy Davis jr !!!
  14. Cyrano
    With only 291.0 hrs on the Broome airframe it will be an interesting investigation.
  15. Cyrano
    I won't put up the link but in utube "helicopter crash sydney 1966" will find it..
  16. Cyrano
    3 Lancs, 12 merlins. 2/3 airborne!
  17. Cyrano
    I visited this aircraft in 2017. Trully magnificent, although doubt the airworthy/flying aim as it was stated at the time it would be flying by now. East Kirkby is also a 20km drive from the Battle of Britain Memorial Flight at RAF Coningsby. One of the best days an aviator could wish for!
  18. Cyrano
    Not a Toyota in sight.
  19. Cyrano
    PS. Kids please don't try this at home!
  20. Cyrano
    Although I have many hours on the shrike I am still in awe at Bob Hoover's skill with this aircraft! [MEDIA=youtube]W2-9BL7sllk[/MEDIA]
  21. Cyrano
    A delightful, fully aerobatic aircraft although I was never game to try an outside loop!
  22. Cyrano
    That sounds familiar. I think the flight was from Wangaratta maybe associated with the museum.
  23. Cyrano
    I recall going for a tiger moth flight in that same area in about 1981. I think the pilot's name was Di Simpson?? Anyone recall?
  24. Cyrano
  25. Cyrano
    A great bush aircraft. I did charter in NW WA in the late 80's; -300. The manual flap lever was very handy. On a rough strip pull some more flap- a bit like a collective on a helo! Get airborne quicker then SLOWLY feed the flap away and climb away!
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