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onetrack

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onetrack last won the day on December 17 2019

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About onetrack

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    Perth, W.A.
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    Australia

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  1. There's a bloke in Lonsdale, S.A. who has a NOS Kenda ribbed tyre in 15x6.00-6 (4 ply) size, for sale on Gumtree for $50. But it's clearly marked "NHS". https://www.gumtree.com.au/s-ad/lonsdale/wheels-tyres-rims/kenda-multi-rib-15x6-00-6-tyre-4-ply-1-only-50ono/1077660175
  2. Yes, Skippy is correct, use straight ribbed tread tyres for aircraft, not chunky-style tread patterns. Skippy, where did you find Kenda 15x6.00-6 tyres with highway speed rating? I have only ever seen Kenda tyres in this size rated as "NHS", and I cannot find any Australian tyre supplier supplying Kenda tyres in this size with a highway speed rating. Here is an Australian aircraft tyre supplier that can supply Michelin and Flight brand tyres in 15x6.00-6. No prices listed, you have to contact them. http://aeroparts.com.au/ocart/index.php?route=information/information&information_id=17
  3. Doesn't sound like there's any major downsides to the changeover. I reckon you've covered all the bases. Maybe some minor tweaking could be required, down the line. I'm quite happy with either Xenforo or IPS, it just means slight differences in style and operation, kind of like just changing to another aircraft type and getting used to the slightly different control layout.
  4. The company in the link below will be able to supply your needs. https://www.waggabiketyres.com/lsa_tyres.html Remember these points: 1. Turf or Lawn/Garden tyres are available in 15x6.00-6 size - cheaply - but they are rated "NHS". NHS stands for "Not for Highway Service". In other words, they are designed for use on mowers, small tractors, electric scooters and golf carts, and are rated for a maximum (off-road) speed of 30kmh. If you want to do 70-80kmh on them, you do so at your own risk. These tyres also have low load capacity ratings. Always find out the tyre specifications and designed use, before purchasing. 2. Tyres built for aircraft cost more because they are rated for aircraft takeoff/landing speeds and loadings. Aircraft tyre brands and types, are Sta Air Hawk and Sta Air Trac. Turf or Lawn/Garden tyre brands are typically Carlisle, Kenda and Trelleborg. Be aware that Carlisle produce a Carlisle Reliance Rib Turf/Lawn tyre which is known as a semi-solid. It is not a pneumatic tyre, it is a largely solid rubber tyre with a hollow core to give a cushioning effect. These tyres are common on forklifts as well as turf equipment, and they're quite heavy. Their advantage is, they're puncture-proof.
  5. Thruster, the hybrid system works, Diamond have proven the concept with one of the new small Wankels producing 30Kw, and driving a generator. A 70Kw electric motor is provided with power via a battery pack, plus the Wankel power, for takeoff. Once in cruise, the Wankel recharges the battery, while the electric motor provides the propulsion. And of course, you have regenerative charging power on descent - plus the chances of an electric motor failure is much less than an IC engine. https://www.machinedesign.com/markets/energy/article/21831674/hybrid-aircraft-proves-gaselectric-flight-is-practical
  6. Don - If you click on the advertisers name, it brings up their profile, including their location under "more information" Methusala is located in the State of the Australian Capital Territory, Australia. The A.C.T. is Australias smallest State, based on a relatively small area around the Nations Capital, Canberra. Methusala's phone number is an Australian mobile (cell) phone number.
  7. There's only one simple solution for light aircraft power, and it follows car design - hybrid power. I personally believe there will be a time, soon, where a hybrid power alternative will provide a viable option to pure IC engine power for aircraft. The hybrid option will also offer a lower emissions level, thus playing a part in cleaning up our atmosphere. Parallel hybrid architecture offers immediate gains via electrification, but series architecture may overtake parallel in the distant future. What is going to happen, I believe, is that hybrid power will lead to a range totally new and innovative light aircraft designs, that will take advantage of hybrid power unit design, ducted props power gains, and various other technologies, to raise efficiencies to entirely new levels. https://www.sciencedaily.com/releases/2018/11/181127171416.htm
  8. The ABC now has aerial footage of the crash site. It's not exceptionally good footage, but it shows what appears to be an impact at a fairly steep angle, with virtually total destruction of the aircraft, and the debris trail spread over about 300-400 metres. I see no major components that have survived. It's difficult to tell from the destruction trail if the impact was wings level or not. If the wing/s separated in flight, I would've expected them to be highly visible, and picked up by the ABC aerial photography crew. https://www.abc.net.au/news/2020-01-24/three-firefighters-who-died-in-nsw-tanker-crash-named/11897704
  9. Cosmick, I don't know what you'd use for a configuration and power plants for a purpose-built-from-the-ground-up fire tanker. Simplicity would be the order of the day, along with high durability, coupled with more intensive and shortened maintenance periods. Hihosland, it's interesting, that in the first report I linked to above, one crash of a C130 was caused by all 4 engines quitting simultaneously. The crew blamed the synchrophaser, which keeps all four props in phase, to reduce noise and vibration - but the investigators blamed the crash on fuel starvation. Curiously, despite the investigators claiming they knew the cause of the crash, they couldn't pin down the precise sequence of events that led to the claimed fuel starvation. Perhaps there's infrequent related events in certain extreme operating conditions that come together, to create a fuel starvation issue, that still needs to be investigated in great depth. I'd guess the problem with a crash such as this, with major destruction of much of the aircraft, it makes investigation of fuel-feed faults very hard to trace.
  10. The suspicion appears to immediately be on engine malfunction - and the Allison T56-A-15 (and 16) are apparently very prone to overheating damage to turbine assemblies. I have no idea if the heat levels above a bushfire would cause overheating problems in the turbine assemblies, but it must surely be a major risk - along with heavy dust, smoke and ash particles, which must also impact seriously on turbine blade condition. No doubt the answer is somewhere in the following documents. https://fas.org/man/dod-101/sys/ac/docs/c-130-bar.htm https://www.lockheedmartin.com/content/dam/lockheed-martin/aero/documents/sustainment/csc/service-news/sn-mag-v11-v20/V14N1.pdf
  11. A C-130 air tanker is reported by three witnesses as "crashing in a ball of fire" at Peak View, in the Snowy Mts. 3 POB, RIP brave men. https://7news.com.au/news/bushfires/large-water-bombing-aircraft-has-crashed-at-peak-view-reports-c-661253
  12. Loctite requires 260 deg C to soften and release. I'd be heating the components in an oven to 260 deg, to get an even high temperature. Be very careful with the softness of aluminium once heated to that temperature. It will lose one-third of its strength at that temperature.
  13. I watched the whole video. Despite the excruciating accents, and the poor speaking abilities of the presenters, they do raise many intriguing points. What I would like to know, is why these engineers calculated MH370 trajectory varies so substantially from the "official" calculated version - and why have they calculated the aircraft turned to the S.E., and went past the South side of Christmas Island, while at the same time it was descending in 3 different steps, ending up at 5000' before it crashed into the sea S of C.I.? They did not explain the major discrepancy in flight paths, nor how they calculated the lower and lower FL's of the aircraft. I believe (and always believed) that the aircraft crashed well N of the ATSB search area. The reason being, there was never a skerrick of MH370 wreckage that ever turned up on the W.A. coastline, which it would have, if it crashed in the ATSB search area. So the corollary of that is, the aircraft crashed well N of the search area, in the latitudes where the Easterly Trade Winds blow offshore from W.A. during March. That is, the latitudes Northerly from around 27 to 28 deg S. (approximately around Geraldton/Kalbarri). The fact that the three wreckage items proven to have come from MH370 were found on the Eastern islands of Southern Africa is proof of this, as these blokes have confirmed. I also believe the aircraft was cunningly piloted to its crash site by someone highly skilled as a pilot. Only the Captain had those skills. The likelihood of "other persons" with evil aims being in the cabin is extremely low. The pilot was known to have watched the trial of Anwar Ibrahim and was seen leaving the courtroom in anger at the obvious corruption and political manipulation of the legal processes of the country for political aims. We have since seen the PM of Malaysia charged with massive theft, and with those charges comes the smell of total corruption. Malaysia is one of the most corrupt and nepotic countries in Asia, and Capt Shah was obviously extremely angry with the Malaysian PM, the Malaysian Govt and the entire crooked Malaysian system. I firmly believe that Capt Shah set out on a plan of suicide, to bring major discredit on Malaysia, the Malaysian PM, and Malaysia Airlines. We have seen in the Germanwings Flight 9525 case, how easy it was for a totally suicidal pilot to carry out his evil aim. I believe Capt Shah was equally as suicidal, his marriage had ended, his political favourite was being "neutered" on trumped up charges, and no doubt, there may have been other Malaysia Airlines management and corruption issues that greatly angered Capt Shah, that have never been revealed, for fear of more loss of face. From the time that Malaysian PM Najib Razak fronted the cameras, to speak about the MH370 disaster, he came across as a dithering, incompetent fool of a man who was unable to articulate anything of importance, nor produce any statement of value. Everything was left to a senior Govt spokesman to articulate the position clearly - and even then, vast amounts of important information were still not clear, were unknown, or were presented with an air of utter incompetence. As regards Australia's JORN radar not picking up the aircraft - the reasons are simple. It was a Saturday morning, no current threat was on the horizon, and no-one works on a Saturday in Australia if they can avoid it. The radar was simply switched off and unmanned.
  14. That thing looks like a crash waiting to happen. It's bad enough that the tail is so close to the ground, but the prop is even closer. A bit of a gust on landing, creating a nose-up attitude, and it'd be all over, red rover.
  15. The worst "gutser" (or "cropper") I've ever endured, was on a Honda Z50J mini-bike. Riding across a paddock of stubble at about 50kmh with my lunch Esky balanced across the fuel tank, I hit the hardened clay furrows on a headland with the front wheel - and the combination of slippery straw and furrow grooves, sent my front wheel skating out sideways in milliseconds, dumping me and my Esky unceremoniously and quite painfully onto the hard clay ground at 50 kays. Never trust anything with small diameter wheels, they're lethal!
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