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Old Koreelah

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Posts posted by Old Koreelah

  1. ...I don't know of any other activity, industry or pastime in Australia where the government have imposed a requirement that people must sign a declaration admitting that they could very well get killed flying behind one of these engines. This is the sole justification I need for the heading I chose for this thread....

    Asmol if you read the extensive discussions on this forum you might see that far from being a "government" decision, the CASA directive re Jab engines was much more likely a very spiteful grenade tossed over his shoulder by a departing bureaucrat, based on dodgy statistics which they won't show us. Rather than improving safety it has come perilously close to destroying a very successful Australian industry.

     

    The dodgy, unreliable car-derived engines I used to rely on were more in need of scrutiny from CASA.

     

    Like any prudent aviator I assume my engine could stop at any time, but my safety has improved enormously since I fitted a Jabru engine.

     

     

    • Like 6
    • Agree 1
  2. ... the rear attachment lugs shown in post # 41 were all from certified aircraft that were VH registered. The same design and construction was used in Jab's non certified aircraft...

    The best aircraft engineering is always a compromise between lightness and strength. Why would anyone complain if the wing attachement isn't strong enough to resist a crash? You want the structure to soak up impacts so the people inside suffer less Gs. Jabirus seem to have it about right.

     

    When any large transport crashes at speed you usually get confetti; any large bits were probably built too heavy.

     

     

    • Agree 2
  3. ...The paddle steamers with their wool barges used to get up into Queensland in good years...

    Kaz

    Mark Twain visited Australia and was impressed by our paddle steamer history. A few rusting wrecks are still to be found far from today's muddy trickles. Different times.

     

     

    • Agree 2
  4. Garfly wrote: 

     

    Know anything about this one?

     

    I spotted it parked at Dunkeswell Airfield in Devon a couple of years ago.

     

    That's a Holman Bristol type 2000. From Air Britain Photographic Images: "Built by R.G.Holman in 2003 but 5 years later believed not yet flown."

     

    www.airport-data.com/aircraft/G-CCGP.html

    Wow! That's quite similar to one of my back-of-the-envelope designs, inspired by a tunnel-wing experiment yonks ago. Love to see how well it works.

     

     

  5. Ahh, the Le Mans Mk III. A work of art and one of the many bikes I lusted after.

     

    I kept my overloaded Ducati upright all the way into the Alpine Rally site until, just in front of everyone my front wheel found an overgrown bunny warren. Bugger. How fondly I remember the community spirit as, next morning, the first thing anyone did after crawling out of the tent was try to start the frost-covered bike. Lots of kicking and cranking and a great cheer from across the campground as an engine would fire up.

     

     

    • Agree 2
  6. Good move Roscoe. Replacing a vague steam guage with a multipoint digital temperature monitoring system is wise, as long as the installation is thorough.

     

    I am quite happy with mine. You can easily see temperature variations and can set the alarm temperature.

     

    The horizontal bars show the max temp reached by each channel-a handy feature.

     

    image.jpg.e924e66f17ef4f8d4fe817ff36c45031.jpg

     

     

    • Informative 1
  7. ...the so called "RSL" clubs just a bunch of gambling/drinking dens, the actual clubs themselves do bugger all for veterans. And even have refused at times to allow certain veteran groups to be recognised..

    I totally agree, Litie. Our local RSL regularly spends up large on refurbishments, but I rarely enter the place- it is depressing, even though they try to hide the pokies.

    I grew up with a bloke whose father fought harder and suffered more than most. What kept him going thru atrocious, hungry winters working down Silesian coal mines was the back pay he'd pick up if he survived being a POW. He wanted to buy a farm. He never got the money and the RSL was no help.

     

     

    • Agree 1
  8. ...The best way to put the inserts in is cryogenic (Very cool to shrink metal) Liquid nitrogen, with the right interference and good finish so the heat transfers out of the seat. The seat shouldn't be too thick or it's too rigid to compress a bit, which helps it stay there. It's a process that needs good quality control , or you will have failures..Nev

    This level of engineering is beyond my ken, but it fascinates me; I feel compelled to tell of a related experience.

     

    In 1975 a valve guide failed on my Ducati as we rode into Melbourne. I kept going until we got to my brother's place. (The resulting smoke plume caused traffic chaos.) I purchased a new valve guide and seal, which we put in the freezer.

     

    We had a beer or three while we assessed the situation. Using only the standard Ducati tools I removed the head (no head gasket). We put it in the oven. After another beer or two we removed the old guide, tapped in the new (cold) one and fitted the oil seal. After reassembling the valve gear, big brother used toothpaste to lap in the valve. Compression tested at 175psi and it ran like a locomotive for years thereafter.

     

     

    • Like 5
  9. ...Just rebalancing by adding weight to the tail can adversely change spin characteristics of an aircraft, by distributing mass towards the extremities of the fuselage. Nev

    Our little planes are already struggling to stay light, so why do people add weight? Much more sensible to relocate heavy components like the battery or the engine.

     

     

    • Agree 1
  10. As our dollar loses value against the U.S. dollar our exports to them become more competitive. American fliers seem to be a conservative lot and quite a few will prefer a simple, direct-drive engine, like Jabiru and CAMit make.

     

    Because it has a market 25 times the size of Australia, both firms should be building a high profile in the U.S.

     

     

    • Agree 1
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