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onetrack

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  1. onetrack

    eVTOL industry prepares

    onetrack commented on Admin's article in Articles

    I'd have to opine the Israeli startup Air One is possibly closest to a fully operational, relatively simple and stable design, with their EVTOL. Their version utilises a simple wing - nothing on it folds, rotates or otherwise needs complex, troublesome mechanisms - and the wing provides stability in flight. The company is leveraging knowledge they have gained from making UAV's. They have a 60% scale working model, and it appears to be meeting all the necessary aims and projections. Their rig uses 8 electric motors with counter-rotating propellers, and it has inbuilt redundancy - if one motor fails, it lands itself. It holds 2 people and has a 250kg load capacity. The U.S. Air Force is currently doing testing of this EVTOL, and it appears that certification and regulatory controls is about all that's holding it back from production. https://www.airev.aero/
  2. onetrack
    ........glasses if he did this, which would be a disaster, as Nobu really needed those Coke-bottle glasses. Right about then, Onetrack strolled up and said, "You can get up without any worries Nobu, because that's one of our fake IED's that we make, to keep the enemy on their toes!" Nobu heaved a massive sigh of relief, and holding onto his precious glasses with one hand, he pushed himself upright with the other hand. However, as he stood up, he heard a scary sound. It went "RI-I-I-I-I-PPPP!!! .... and right about then, he felt a big portion of his posterior exposed to the cool air of the evening by the jagged barbs of the fence, and this brought on a cold sweat, as he knew that.........
  3. onetrack
    Nev, the Honda GX390 is 390cc in it's original form, they bore them right out, and fit new steel cylinders, and then stroke them with a new crankshaft. So the engine goes from 390cc to 460cc. https://www.nrracing.com/searchresults.asp?Search=460cc&Submit=
  4. onetrack
    Just more corporate greed in action. Good luck to them trying to enforce charges for entering "their" airspace, someone needs to tell them about the Airspace Act 2007.
  5. onetrack
    Here's some pretty unique uses for choppers in the U.S. and Canada .... 1. Rice pollination, Danbury Texas. Apparently the rotor blast does the job much faster than bees. https://verticalmag.com/features/how-helicopters-give-rice-growers-a-helping-hand/ 2. Blowing excess water off cherries in Canada to prevent fruit rot; https://www.bccherry.com/helicopter/ 3. Picking Noble Fir pine cones with a neat harvesting cone dropped over the tree; https://www.weyerhaeuser.com/blog/sustainability-stories-noble-fir-cones/
  6. onetrack
    There's an error in the caption, the aircraft in the foreground is a Hillson Praga, not a Hillston Praga. There were only ever 3 imported into Australia. They were a beaut, lightweight, sporty little machine - but unfortunately, none of them survived WW2. One was destroyed in a crash in 1943, and the other two were lost in fires in 1944 and 1945. https://aeropedia.com.au/content/hillson-praga/ Here's the newspaper story of the Hillson Praga that crashed. It was being flown by two Inspectors from the CAC, and they both climbed out of the wreckage relatively unscathed. https://trove.nla.gov.au/newspaper/article/49545239
  7. onetrack
    .......great glee amongst the many scrap dealers who had gathered to watch - because they all rushed out as one, and collected so much scrap steel and aluminium that was littering the countryside, that the local council issued an announcement that they had ordered an award plaque be given to the scrap metal merchants, for their "Keep Australia Clean" beautification efforts, and that they had raised the bar for all those who.........
  8. onetrack
    Nev, at 40HP for 460cc, that's just under 87HP per litre. Still a lot of output for a little industrial engine. The single cylinder level of vibration would be my main concern, in such a lightweight airframe.
  9. onetrack
    A GX390 Honda single-cylinder industrial engine, producing 40HP?? For how long?? They produce 13HP in their industrial form! You'd think they could've souped up a V-twin Honda GX690 at least - with twin cylinders and 688cc, there's better inherent balance, and more cubic capacity for upping the power output.
  10. onetrack

    eVTOL industry prepares

    onetrack commented on Admin's article in Articles

    So ...... what's happened? We're into the second month of 2024 and I don't see these VTOL machines appearing everywhere as they claimed they would, in 2022 and 2023? Once again, the marketing hype exceeds the ability to deliver something that works. I'll wager they've all stalled at regulatory and safety hurdles.
  11. onetrack
    ........made a Commander, not a Commando, as he thought it was named, and this had led to huge confusion amongst the suppliers as to the correct ranking of the...........
  12. onetrack
    They rotate because any movement of a gas or liquid not restrained, is subject to the Coriolis effect. However, the Coriolis effect is minimal when gas or liquid speeds are slow, or the travel distance is short. It doesn't long though, for heated rising air to start to spin. Ever seen a willy-willy/cock-eyed bob/mini-tornado, crank up? They will start to spin only 15 to 20 metres above hot ground. https://education.nationalgeographic.org/resource/coriolis-effect/ Interesting fact: A friend who was an artilleryman during the Vietnam War told me how they had to calculate the Coriolis effect on the target point of 105mm artillery shells that were fired at long distance targets. Even more interesting was the fact that these calculations were done manually, longhand. No hand-held calculators back then.
  13. onetrack
    ..........the Cinglish language build instructions. It was at this stage that suddenly everyone realised it would have been much better to get the build instructions booklet properly translated into English, rather than relying on Cinglish, which was even more obtuse and mangled than Chinglish. As a result of the Cinglish instructions booklet, there was a rather large pile of surplus parts littered around the floor. In addition, when the flaps lever was pulled, the brakes came on; when the control column was pushed forward, the.........
  14. onetrack
    I watched a pelican soaring over the house this morning in thermals at about 500 feet (a quite unusual sight, I might add, I've never seen one here before, I'm quite a few kms from open water) - and he was going CW.
  15. onetrack
    He was either one lucky pilot, or a very skilled pilot, to be able to get her down in one piece, and get out before it burnt. That one won't ever fly again. https://www.dailymail.co.uk/news/article-13026787/Dundowran-beach-fraser-coast-aircraft-incident.html
  16. onetrack
    C'mon, he's spent $11M of his own money - not from "contributors" to a "search fund", that's "guaranteed to find the wreckage"! - so cut him some slack, I think this bloke deserves a hearing.
  17. onetrack
    The silicone-based sealants are notorious for forming globs on the outside of the seal surface, that break off and block oilways. A mate had a Cat engine in his truck grab a piston in the bore. The repair crowd replaced the piston and liner, and 3 weeks later, it grabbed again. Second time, he gave it to another repairer, who found a glob of RTV blocking the piston-cooling oil jet. He cleaned the engine out properly, replaced the piston and liner again, and it gave no more trouble.
  18. onetrack
    There's still a lot of WW2 aircraft unaccounted for. The wing sweep doesn't look right, but maybe that's because the wings fractured at their roots as it hit the water. Maybe we need to get this bloke to find MH370, with his kind of tenacity.
  19. onetrack
    It must be powered by a Junkers-Jumo 209 - that's why it's signwritten, "Wiesel".
  20. onetrack
    Loctite 518 doesn't form globs, any excess protruding from the joined surfaces dissolves on contact with oil, and Loctite 518 retains a level of flexibility when set. Henkel describe Loctite 518 as "semi-flexible".
  21. onetrack
    Loctite 518 is actually a superior product to Loctite 574 in the case of sealing crankcase halves. You can compare the two products - including the TDS's - on the Henkel-Loctite site. https://www.henkel-adhesives.com/au/en/product/gasketing-sealants/loctite_5180.html https://www.henkel-adhesives.com/cn/en/product/gasketing-sealants/loctite_5740.html
  22. onetrack
    Two very large commercial airliners, one flying at 700kmh and the other travelling at 870kmh only took out around 3000 people on 11th Sept 2001, despite being loaded with 36,800 litres and 34,500 litres of Jet A-1 respectively - so I fail to understand how you could take out 5000 people with a single RA-Aus aircraft loaded with perhaps 100 litres of petrol at the very most, and unable to probably even reach 300 kmh, without the wings tearing off. It would be virtually impossible to take down any building with an RA-Aus aircraft. I fully understand the need for an ASIC card for commercial airline operational areas, but the ASIC card is over-reach for probably 80% of the aviation areas of the country. It's interesting to stop and think about the fact that all the terrorism attacks in aircraft around the world were carried out by people who had pilot training, piloting skills, and qualifications - not exactly your classic "raghead" terrorist.
  23. onetrack
    ..........sniffing Albo's feet once too often and in inappropriate locations and at inappropriate times. The next thing, she was being accused of sniffing ar..........
  24. onetrack
    ........and he said, "What exactly again, are we looking for here?" The minders decided they'd better occupy the media with some distraction to take the heat off Ambo, who was still struggling with getting a grip on the spade, so one of the minders said, "Did you see where the PM has just signed off on that new................
  25. onetrack
    .........maybe even confuse Zelensky for Putin, as Joe just did. But then there was the questioning over the Ukrainian-Australian military deals, and just how much Ambo knew about the.............
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