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Marty_d

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Everything posted by Marty_d

  1. Now that wheeled wing dolly is a good looking beast. I'm copying that.
  2. Check the BRS website. When I was considering putting one on the recommended cover was light polycarb or similar, with a circle scored in it and radiuses scored from the centre out in 45 degree increments. The intention being that if the rocket fired it'd break through the scored polycarb and those radii would open up like a flower. I agree with the others re strut mounts and bolt types. Not a huge investment to replace all the essential (wing-holding-on and primary control) bolts with proper AN ones, and you'll get peace of mind. Definitely need to take the paint off those strut mounts and check for cracks though. What is the part with the crack in the side where you asked if a doubler should be used? If at all important I would fabricate a new one - doesn't look very big but the rolled edge may give you trouble.
  3. Vertical fin & HS on both of those resemble the C17 Globemaster.
  4. Hi all, Interested in where to source a pitot head in Australia. The CH701 plans just show the single (facing airflow) tube under the wing, but it seems common that people use the double tube where static is on the same probe either concentric or parallel. Aircraft Spruce have them for about $40 US - https://www.aircraftspruce.com/catalog/inpages/pitot15144.php - but it's the postage that kills it! If unavailable in Aus, has anyone built one? I'm guessing the static tube has the forward end closed but small holes drilled into the side - how many, what size? etc. Do you use 1/4" nylon or plastic tube? All advice welcome. Cheers, Marty
  5. Thought it was suspicious that Google only found that image on Facebook and YouTube, no reputable sites.
  6. Marty_d

    old stop flying.jpg

    Not as small as the undercarriage on the biplane behind him.
  7. It doesn't surprise me that Phantoms etc can fly with wings folded - but imagine the landing speed...
  8. Google's most popular answer must be wrong then. Boeing 737-800/Cruise speed 842 km/h Boeing 727/Cruise speed 917 km/h
  9. If it was a 727, I believe their cruise speed was in the order of 40 knots higher than 737's to start with.
  10. I think there's a fairly big thread over in Social Australia about this. For me Occam's Razor informs. What's more likely - aliens that have the technology to travel thousands of light years yet can't drive properly in Earth's atmosphere and only appear to Daily Mail readers, or existing phenomena - weather balloons, auroras, ball lightning, light patterns, electronic glitches and hoaxes? As for US congress - half of them seriously believe Trump is their best hope, so not a lot of logic going on in those heads.
  11. You're limited with some aircraft for sight tubes. On mine for instance the wing roots reduce in size close to the cabin, so there's no way to have a full height sight tube.
  12. That's another alternative Nev but I'd question whether it's simpler, as you're adding another component which requires plumbing in just to move the top-mounted sender from the tank. I wouldn't mind cutting a 59mm hole in the top of the tank, but I very much don't want to cut any holes in the side or bottom.
  13. Top hole makes more sense than what I have (and haven't installed) - I've got a couple of VDO bent-leg float senders where you have to cut a hole in the side of the tank. After hearing some stories about leaking tanks I decided not to use them. If you end up sourcing the dip senders and they do the job, please let me know - I might look at them myself.
  14. If the French butcher got there quick enough he'd be hors d'oeuvres.
  15. With a 7 litre header tank it's more like 20 minutes. If you're more than 20 minutes away from ANY suitable landing site then planning was probably lacking in the first place.
  16. I'd be interested in that too, haven't made my boots yet.
  17. Savannah have that setup, I'm using it in my CH701 too. Basically the header should always be full (gravity fed from wings) so if the sensor at the top goes dry it sets off the warning light on the panel.
  18. That looks like the go. Many are 6 or 8mm but the line at that point is 3/8 (9.5) - that one would allow those barbs.
  19. Has anyone had luck sourcing fuel on/off valves? Inline that is, just for a safety "off" in the cabin in case of fire etc.
  20. A follow up question... A couple of people have said they threaded the inside of a barb and inserted the restrictor jet into it. Given the restrictor jet has a barb itself - is there any reason I can't just tap an M5 hole into the body of the manifold and have the 2 restrictor jets (tank return and fuel pressure gauge) threaded straight on to it? Yes the barbs are very small (around 4mm OD by the looks of it), I'm assuming there's a fuel safe hose of that size available? And an additional question - the back of my fuel pressure gauge looks like this. Can anyone remember what fitting they bought to connect a hose/line to this? Thanks!
  21. Hi Bryan, I don't have a Sav, but a CH701 which is a bird of a very similar feather. Plans called for right thrust 3 degrees (0 down). I just used 3D CAD to locate the engine centreline 3 degrees from the fuselage centreline. Of course the prop plate should still be in the centre line of the aircraft, which means the back end of the engine is kicked out to the left (port). Then drew the location of the Rotax ring mount holes behind the engine and drew in a mount to fit. This seems to have worked. Having said all that, doing it with washers sounds easier if that's an option.
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