Jump to content

onetrack

Members
 View Profile  See their activity

  • Posts

    7,355

  • Joined

  • Last visited

  • Days Won

    91

 Content Type 

Everything posted by onetrack

  1. onetrack
    It appears the crankshaft design has been fine, up until this particular batch - so the problem is in the batch of crankshafts, not in the crankshaft design.
  2. onetrack
    It appears the recall is being managed very well, with the 6 cyl engines most at risk being repaired first, and the remaining engines dealt with as time and ability permits. As the new crankshafts are being supplied at no cost to owners, I would think this was a very worthy and laudable exercise. Remember, Jabiru still have an aircraft manufacturing operation to support and keep in production - replacing faulty crankshafts is something that must be managed, so it doesn't interfere excessively with the manufacturing side of the business. The 6 cyl engines affected were built April 2017 and June 2024. Jabiru announces SB re crankshaft replacement - https://www.australianflying.com.au/recreational/jabiru-issues-service-bulletin-for-crankshafts#:~:text=Jabiru Aircraft last week issued,April 2017 and June 2024.
  3. onetrack
    ......a big, gaily-decorated bus to run the mini-skirted miners around the aerodrome, and to carry the multitude of aircraft spares needed for their equally-diverse range of outrageous aerobatic aircraft, some of which were obviously very "girly", which led to jeers from the.........
  4. onetrack
    Doesn't anyone manufacture "thornproof" tyres for aircraft? When I was a young teenager, riding a bike everywhere, "double-gees" (or "three-cornered jacks") were a curse to us for causing flat tyres, as they were in sizeable quantities in numerous places. But Dunlop made the "Thornproof" bike tyre (specifically because of the aforementioned seeds, I believe, from the early 1900's) - which tyres I bought, and they were a Godsend, no more flats from spikey plant seeds! - and they were very effective at resisting punctures from other sharp objects, too. The Americans produce a bike tyre liner called "Mr Tuffy", and this liner is effective at resisting flats from spikey plant seeds. Surely, someone has produced a liner for small aircraft tyres to improve puncture resistance? The tyre repairers hate the "Fix-a-flat", "Tyre Goo", and other puncture-curing liquid products, because they make such a mess, and make tyre repairs so much more difficult to carry out.
  5. onetrack
    It's been a long time since gelignite was manufactured, Turbo! You obviously haven't blown out stumps for at least 40 years! Nowadays, using explosives for stump removal is not exactly an "approved purpose", there's any amount of earthmoving equipment will do the same thing, without breaking all the windows in neighbouring houses!
  6. onetrack
    Despite Skippys regular praise of Hengst inline fuel filters, I have found from long experience (60 years of fixing mechanical things), that those small inline plastic housing filters containing cellulose-treated paper as the filtering medium, are a prime source of fuel flow restriction and blockage. Even a partially-plugged inline filter increases the load on a fuel pump and shortens its life. Remember, these little filters are the cheapest filter you can purchase, and it's hard to find specifications on them as regards construction materials, because they are cheap, and the lowest level of filtering you can acquire. A fine mesh screen filter is a preferred choice for primary inline fuel filtering. https://www.industrialspec.com/about-us/blog/detail/screen-versus-paper-small-engine-fuel-filters/
  7. onetrack
    Sharp eyes, there, Nev. You're correct, the Packard diesel was long ago scrapped and a buyer from Argentina fitted a Wright Whirlwind. That engine was lost along the way and the engineless airframe sold back to a buyer in the U.S. in 1989. That owner passed away before any restoration work could be carried out, and the sad remains of the aircraft only just escaped being dumped. Another American purchaser bought the remains and rebuilt the aircraft completely and fitted a Wright R-975. I have seen photos of complete Packard DR-980 aircraft diesel radials, some have survived, but it appears none are fitted to aircraft. https://airandspace.si.edu/collection-objects/packard-dr-980-radial-9-engine/nasm_A19710893000
  8. onetrack
    Interesting to see the black Buhl running a Packard diesel radial. I believe this aircraft was purchased by Packard to be used as the "show machine" for their Packard DR-980 diesel. Sadly, the designer of the DR-980, one Capt L.M. Woolson, was killed in an air crash in April 1930, and coupled with the onset of the Great Depression, work on further development of the DR-980 ceased immediately. It could have been a different story for aircraft diesel engine development, if Woolson had survived, and the Great Depression had not interfered. https://www.autoevolution.com/news/this-1929-buhl-air-sedan-was-a-private-plane-for-packard-now-it-s-for-sale-201213.html#:~:text=This 1929 Buhl Air Sedan,Now it's for Sale - autoevolution
  9. onetrack
    ........a dress shop, so he can match his dress to the snakeskin boots he "acquired". Now, it's not generally well known, but Cappy is actually a top-level cross-dresser, making Peter Wherrett look like an amateur, when it comes to cross-dressing. However, Cappy started to become really stressed out when he couldn't find a decent dress shop in Broken Hill because............
  10. onetrack
    I'd never get that close to the limit with baggage today. I learnt my lesson about 20-odd years ago, I packed a set of car coil springs in my bag and got overweight, so I had to repack my bag, and transfer weight to my partners bag, in the airport. They probably wouldn't allow that today. Besides, I've now learned how to travel light, and buy what I find I need when I get there.
  11. onetrack
    News media article - https://au.news.yahoo.com/chopper-crash-near-holiday-hotspot-041137433.html
  12. onetrack
    Wow!! What a great shot! Fancy getting such a good photo of an Mi-26, right after it's just given birth!!
  13. onetrack
    .......keskin boots! I've left them in my unattended and unlocked car! I'll have to get back there quickly and ensure that...........
  14. onetrack
    It's interesting that the above-mentioned crash happened during training. Training crashes seem to be much higher in helicopters than in fixed wing aircraft, I believe it has a lot to do with students having difficulty developing the unique skills set and control sensitivity, that's required to fly a helicopter. This company insists helicopters are safer than fixed wing aircraft - but they would say that, wouldn't they? - they're a helicopter company! https://www.helicopterexpress.com/blog/helicopter-safety#:~:text=Myth %231: Helicopters Are More,operations%2C and disaster relief efforts.
  15. onetrack
    .......away the charge of "urinating in public". Bluey had to think fast. He said, "See that bloke loading up that ute! He's stealing all that stuff from the pub!" Const Doubtfire immediately released her iron grip on Bluey and marched over to Turbo with a grim look on her face. But, once she got a clear view of Turbo's face, her expression changed to one of.........
  16. onetrack
    The wreck is black and white. The white sections (the upper structure) were badly crushed and dislodged when the helicopter landed upside down in the River, thus leaving only the black lower portions mostly intact.
  17. onetrack
    Back to the Hydrogen Dream - below is a very good and a very comprehensive (and lengthy) article outlining the near-total failure of the Hydrogen Dream, in Public Transport, in the EU. Essentially, only a couple of Hydrogen Transport schemes remain in operation, and they are only "viable" (and I use the word loosely), because of a ready supply of waste hydrogen from industrial processes in nearby major industrial zones. Even at that, the Hydrogen buses are still more expensive overall than battery-electric buses. An interesting point is the amount of hydrogen loss caused by leakage. It's around 1%, all the time - from tanks, from vehicles, from everywhere H2 is made or transported or contained. That's quite a bit of loss as compared to fossil fuels loss. Even taking into account ships sinking, vehicle crashes, and pipeline failures, I wouldn't think that fossil fuels losses or wastage would come anywhere near 1% of the total volume extracted and transported and used. The bottom line is, the battery-electric bus is making great strides into the public transport realm, and hydrogen is becoming a more distant dream each passing year. https://cleantechnica.com/2025/04/14/hydrogen-vs-battery-buses-a-european-transit-reality-check/
  18. onetrack
    After having had many people try to kill me, in dozens of different ways, including people shooting at me (none of them succeeded!), I guess you could say, I'm a little risk-averse!
  19. onetrack
    Well, if the ever-suspicious "cash crop" growers don't get you in your ultralight, then the hunters will! https://www.cbsnews.com/colorado/news/hunter-pleads-guilty-to-shooting-ultralight-pilot/
  20. onetrack
    Of all the failure causes, a mast bump rates highly as the main cause of this crash. It would have to be a major maintenance fault that caused a Jesus nut failure. It appears to me, from what I've seen in videos of 206 in the air, the entire mast, rotors and main gearbox tore away in one piece. For that to happen, there would have had to have been a rotor impact with the fuselage at some point. It's not unknown for tail rotors to fail, in which case all bets are off, and anything can happen from there on in. Who recalls the 1966 Bell 47G helicopter crash in central Sydney, at Circular Quay? The Circular Quay crash was caused by a maintenance crew who left a washer off a nut on one of the tail rotor bolts. The missing washer caused tail rotor flex that eventually fractured the blade. The crash investigators went through every rubbish bin in the aircraft workshop, until they found the missing washer. They had to find the washer, to determine whether it was left off accidentally, or if it had fractured in flight, and fell out. https://www.abc.net.au/news/2018-12-10/the-helicopter-crash-that-changed-australian-aviation/10585722
  21. onetrack
    .....was even given any of this dodgy Chinese tucker, I wouldn't feed it to my dog!! That Chinese cat is the biggest giveaway ever, and I wouldn't be seen dead in a Chinese restaurant! - let alone go into one to vote!" Turbo sighed. This bloke was a major problem, and he needed to be dealt with in a manner suiting his abrasive nature. Turbo decided it must be all the exposure to West Australian sand that gave Bluey his abrasive nature - and God knows, Esperance has sand aplenty. "Let's go over to the Sailors Arms pub and have a little talk over a beer and good old meat pie", said Turbo. "They not only serve Emu Bitter over there, they sell good pies containing real beef!" "Now yer talking!", exclaimed Bluey. "Lead on, I need to..........
  22. onetrack
    Quite a good video, but the AI sections fail to show just how dark and often foggy, the landscape was. I wasn't aware that AJ-Y returned with its bomb intact, due to damage to its rear turret and weather stopping them from finding the target. Nothing is mentioned as to whether AJ-Y landed with the bomb still aboard or whether it was dumped offshore. I couldn't imagine a Lancaster (and a damaged one at that) landing with a large bomb still aboard. The video states the damage was only temporary and the Germans soon recovered with rapid dam repairs. However, I think that's not entirely correct, the dam water damage was substantial, and over an extended period. Possibly the saddest part was over 1000 POW's and forced labourers losing their lives as a result of the raid. The British obviously considered those people expendable. Barnes-Wallis stated he would have never thought up the scheme if he knew beforehand, the number of air crew that would be lost. But he obviously didn't even consider the civilian losses potential. Overall, the successful number of bombs was quite low in comparison to the number originally sent aloft. By any other measure, on any other raid, it would not be declared a successful raid. https://en.wikipedia.org/wiki/Operation_Chastise
  23. onetrack
    The link is to a Private Facebook group, you need to apply to join the group, and if the admin of the group approves you, only then can you see what is on the group site.
  24. onetrack
    .....sly advert for the Turbine Cat Farms operations!! And what's in those Chinese dumplings that are simply labelled "meat dumplings"? Suddenly Turbo appeared and grabbed Blueys elbow, and propelled him (avref) to a quiet spot in a lane adjoining the restaurant. "Listen", Turbo hissed between clenched teeth, "I don't want you making a song and dance about things like Chinese cats and..........
  25. onetrack
    ........flee Chinee glift for every Osstralian voter who attends voting booth (oh, and voting booths are made in China, too! How good is that?)" But Bluey was still suspicious. "I dunno, theres something about these offers that just doesn't look ridgy-didge to me", he opined, whilst chewing on piece of barley straw. "For a start, why is the local Chinese restaurant the polling station, and what's with the big red.............
×
×
  • Create New...