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danny_galaga

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Everything posted by danny_galaga

  1. danny_galaga
    https://generalaviationnews.com/2025/03/26/cessna-172-runs-out-of-fuel-during-flight-lesson/
  2. danny_galaga
    I still shrug in your general direction 🤷‍♂️ 😄
  3. danny_galaga
    Maybe because this is an aviation forum 🤷‍♂️
  4. danny_galaga
    The end game is not to be burning it.
  5. danny_galaga
    For now, that might as well remain diesel. Let's save fossil fuels for necessities like this, and use electric where we can.
  6. danny_galaga
    It's WAY more efficient to store electricity than create hydrogen. That's because the electricity just gets put straight into the grid when needed. Hydrogen needs to be compressed, transported etc. "Multiplying these individual efficiencies finds that just over a third of the original energy input into the cycle remains available for work by its end – a cycle efficiency of about 37%, meaning 63% of the original energy has been lost." https://h2sciencecoalition.com/blog/can-electrolysers-of-the-future-solve-hydrogens-efficiency-problem/ I think it'll still be worthwhile to make SOME green hydrogen, since you need to for industrial purposes other than as fuel.
  7. danny_galaga
    Green hydrogen just means you've used only renewable energy to electrolyse water. Splitting the molecule into one O and two Hs. The problem is, water is actually quite a perplexing molecule. For instance, most materials shrink as they get colder and expand when they get hotter. Water shrinks as it gets colder, to a certain point. Then as it gets even colder, it starts expanding again! It's also quite tenacious. And there really doesn't seem to be any way of not expending a LOT energy to split it. Really doesn't seem to be much reason to make green hydrogen, other than where you might need it for some industrial purpose (chemical for instance) without putting carbon in the air by getting it from fossil fuels (blue hydrogen).
  8. danny_galaga
    I agree with one-track. Hydrogen fuel cell is a pipe dream. Mercedes have/had been mucking around with it since at least the early 90's. As a kid I was enamoured with the idea. but EV tech has slowly but surely surpassed fuel cell tech. You just can't get around the transport costs and inefficient manufacture of green hydrogen.
  9. danny_galaga
    Did someone say Ace of Base?
  10. danny_galaga
    Nice. That'll definitely help while the engine is running since the airflow will keep the aluminium cooler than the exhaust pipe 😎
  11. danny_galaga
    If you are referring to my comments about trade wars, despite all the bluster from the Orange Guy, tariffs on Chinese products will be 10%, while most of his allies cop 25%. That's products to the US of course, but there are many ramifications for other countries, including how particular companies fair in the new environment. If Americans buy more zongshen because they've become an even more enticing proposition, that could mean zongshen have more income to streamline their production even more.
  12. danny_galaga
    China is fast becoming like Japan in quality. I think have to remember you get what you pay for. If you go on Temu and buy a two dollar sweater that catches on fire, well.... But if you are buying a quality product, there's no reason it can't be Chinese. The price is a sticking point for now. But we'll see how the coming trade wars effects Rotax prices compared to zhongshen prices. The current bizarre US regime might be a silver lining for high end Chinese products.
  13. danny_galaga
    That's gold 😄
  14. danny_galaga
    Hey! My hand is famous ☺️
  15. danny_galaga
    Yes, when I first learnt to fly and I was taking some friends for a flight, I was quite high from an airfield I wanted to do a touch and go on. Piper warrior. But I forgot to warm through the motor regularly. When I accelerated to go, the engine spluttered and had quite a hard time because of the cooling. That's just at idle. If it needed to be started, then who knows?
  16. danny_galaga
    Just read that too. Why turn off ads-b on a training flight? Something you'd think you'd want in a crowded airspace.
  17. danny_galaga
    Oh wow. I had always thought it was illegal 😯
  18. danny_galaga
    What terrible ironies the universe throws at people 😞
  19. danny_galaga
    Crossed my mind too. Not necessarily incorrectly set, but out of calibration. Cracked static line or something.
  20. danny_galaga
    Guys, I'm sold! Will still be a while but when it comes time to upgrade my prop I'm getting a Bolly for sure 🙂
  21. danny_galaga
    As far as I'm aware, blades coming off in ultralights is pretty rare. But it was in the back of my mind when I went for my good old fashioned laminated single piece wooden propeller ☺️
  22. danny_galaga
    Sad times we are living in 😞
  23. danny_galaga
    No. Was just looking at prices now. I was keen on a Sensenich, because they have a really neat system for adjusting pitch. But then I looked at Bolly and it's probably going to be about HALF the price of the Sensenich 😯. At that difference, I can live with a slightly fiddlier setting up stage 📐 😄 And of course Bolly are Aussie ☺️ If only they made a wooden prop - it would be a Bollywood 😃
  24. danny_galaga
    Would love the right propeller in wood. They look lovely ☺️ But I can't afford to play around with several different propellers until I hit the jackpot. So I will probably go ground adjustable. But no rush. Not much change out of three grand for a prop now. When I bought this prop about six years ago, it was roughly $1600. Not quite sure what you mean by direct drive. Rotax 912 has a gearbox. It's not really an option.
  25. danny_galaga
    I think down the track,once I want to actually go places, my lovely wooden propeller will have to go 😞 . Cruise right now is 70knts at 5200 rpm. It can easily redline during takeoff. I'll get something ground adjustable to tune it. But for now there's no point since it's not going far for a while...
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