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About Subsonic

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  • Birthday 01/11/1972


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  1. This experimental DIY EFIS has VSI https://experimentalavionics.com/efis-ver-2-0/
  2. Step away from the computer, just leave it alone, please.
  3. A very interesting build this one, which I have been following for a while. Have you made any further progress? Michael.
  4. Hi Paul! Nice to see you in here. Frank, FPV is First Person View, or flying a model aircraft from the point of view of an onboard camera. Here's a video I did a few years back, in a spot Paul knows well ;-) Michael.
  5. Hi all and thanks for your replies. Update: I've booked accommodation near Oshkosh, a town called Fond du lac, for four nights. I never considered camping on site, I think dad would laugh at it - not really his style. As a bonus little gift for dad, I've booked a flight for us both in Aluminum Overcast, EAA's own B17. Though I've laid spanners on a few I've never actually flown in a warbird before. Pretty excited to see what it will be like! Michael.
  6. I’ve been a member of this forum for some time, often lurking but have a long history in aviation. I worked for Qantas for over 20 years before finding my feet in other industries. Aviation in me still burns strong. This year I’ve decided to bite the bullet and get something done that I’ve been thinking about for years and visit Oshkosh. My dad’s getting older too and I am looking for things we can do together, so this year we’re going to Oshkosh! I don’t want to drop my dad deep in to avgeek land for a whole week so I’ve drafted a gentler itinerary with him in mind for a short US visit
  7. On top of all the points raised in the article on how this would be dangerous / impossible to survive, all checked bags on domestic flights out of tullamarine are x-rayed. The X-ray algorithm would pick up the high organic content of the bag and reject it for analysis. A human analyst would review the x-ray image and immediately reject the bag. The person who checked the bag would be offloaded and asked to open the bag. It would never make the flight.
  8. I'm confused now by this build. Is this now a fiberglass aircraft or are you just making skins for the metal structure you have already built? Bex, can you share the plan here?
  9. I don't understand how this thing works either. If you have a torroid partially fluid filled, and rotate it eccentrically, the fluid will move to the area furthest from the axis. It has to, the same governor weights move outwards against the spring as they are spun, and fluid flows downhill. Sounds like Snake oil to me, but if people say they have measured an improvement to validate it, obviously I'm missing something. Perhaps there is a dampening effect due to the viscosity of the mercury in the tube? If that's the case, when the unbalance is rectified by the movement of the mercury to
  10. With the entire aircraft descending vertically, the Centre of Gravity is ahead of the centre of lift of the entire body. Simples.
  11. The best training tool to learn the basics of rc heli flying these days has to be a small quadcopter. They can be had for next to nothing, and are virtually bullet proof. You will learn the basics very quickly; tail in, side in, nose in hover, forward flight and patterns, but obviously they will not fly inverted so you'll need a real cp heli or a good sim for that. If you spend a little more and buy one that you can bind to your existing transmitter it will be an easier jump back to your heli. But be careful! From cheap quads it is not too far to the vortex of FPV quad racing, so be warn
  12. I always thought it meant Engine Failure At Takeoff.
  13. High Ice Water Content? https://www.ral.ucar.edu/sites/default/files/public/events/2015/friends-and-partners-in-aviation-weather/docs/culver-and-fahey.pdf
  14. Australia first (and the rest of that list) is a false dichotomy.
  15. There is residual stress in the longerons because they are bent to shape and held there using other structure. In my experience (admittedly it's been many years since I worked on aircraft, and a very different type), a structural element was first formed to it's intended shape, then installed in the buildup. I've just never seen this type of construction before, and would guess that it would result in unknowns to determine ultimate load and fatigue life. I'm not an expert, so would need to defer to someone who is.
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