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  1. J

    Thinking about developing a new engine for GA, but looking for a bit of feedback before starting.

    Thank You to everyone who has commented; the information has been very helpful. I will continue to read responses as they are posted, so please continue the conversation without me! I think I am going to follow the last bit of advice here though as I continue to work towards development or lack...
  2. J

    Thinking about developing a new engine for GA, but looking for a bit of feedback before starting.

    I am very well aware of Teal's gearbox. I have been a huge proponent of it since the first time I saw it because I am also pretty familiar with the Yamaha engines that are used to power it. I know that Yamaha makes FANTASTIC engines and that those things are made to run at WOT for their entire...
  3. J

    Thinking about developing a new engine for GA, but looking for a bit of feedback before starting.

    For what it's worth, the development path I am thinking of will start with a proof of technology prototype that can be scaled up as required per the application. One of the advantages of going that route is that I can scale as appropriate for the final application. I'm using a 4 cylinder as a...
  4. J

    Thinking about developing a new engine for GA, but looking for a bit of feedback before starting.

    I have been keeping the military as a customer in mind to help increase the customer base for sure. My primary interest has been driven by the lack of innovation in the GA space though, and you guys are at least somewhat accessible to help me gather requirements, so I am starting here. I very...
  5. J

    Thinking about developing a new engine for GA, but looking for a bit of feedback before starting.

    Noted on certification. It was never my plan to target certification to start with, only an option if the market called for it. The more people reply, the less it sounds like the market calls for it. I was planning on using as many COTS components as possible for this design, but the core...
  6. J

    Thinking about developing a new engine for GA, but looking for a bit of feedback before starting.

    Unfortunately, I doubt it will ever be something that can just bolt in place of a Lycoming. Specifically because if the weight reduction from the old Lycomings. Bolting one of these in place of a 540 would throw weight and balance right out the window and would likely not fit the same cowling. I...
  7. J

    Thinking about developing a new engine for GA, but looking for a bit of feedback before starting.

    Noted on the certified side. The idea there was more intended to demonstrate to potential customers that they could have confidence in the engine as it would pass even those stringent requirements. Fair enough on my not having to be the pilot. I can see how that would mean a lot from a...
  8. J

    Thinking about developing a new engine for GA, but looking for a bit of feedback before starting.

    Understood. I think I could cover much of the FAA testing costs and data with the testing that I would want to put the engine through myself. I also think I can go through the development process in a slightly more affordable way than what I seem to see from other "new" suppliers. Ideally, I can...
  9. J

    Thinking about developing a new engine for GA, but looking for a bit of feedback before starting.

    Getting it certified is not necessarily off the table. For work, we had to cert engines to military standards, so I do have some idea of what that might look like. I understand that the FAA is going to be more strict, just noting this for reference. A complete FWF package would be doable if...
  10. J

    Thinking about developing a new engine for GA, but looking for a bit of feedback before starting.

    Hello all, After working in the industry a bit, seeing some of the "new tech" (aka. vaporware), and noodling on things, I think I have a new concept in mind that would be able to deliver the power of a 540 in the package size and weight of a 360 and with better efficiency to boot. TBO would be...
  11. J

    Automotive engine weight database

    I believe everyone should have access to this, but if someone could please check and let me know, that would be great. Link To Spreadsheet
  12. J

    GM LE2 engine conversion

    Ahh, I didn't realize they were lugging them like that. Makes more sense now. It's interesting that they are effectively increasing the compression when they were having auto-ignition issues before. Or did they increase the dish depth? It just seems like a really odd and expensive way to solve...
  13. J

    GM LE2 engine conversion

    Did they actually move the ring down or just thicken the crown? That just seems like a very odd change because it's not like these things are under a ton of stress where breaking ringlands would be an obvious common failure mode.
  14. J

    Another Boeing 737 failure.

    Another update from Juan:
  15. J

    Another Boeing 737 failure.

    Another great video from Juan on this:
  16. J

    Another Boeing 737 failure.

    As always, Juan does a pretty good job examining the incident:
  17. J

    Aeromarine Merlin II

    Hello all, I was just curious if anyone here has any experience with the Merlin II from Aeromarine: https://www.aeromarine-lsa.com/merlin-ii/ All aluminum skin, is seemingly pretty efficient, and the interiors look nicely laid out. I can't find any videos on the Merlin II, just the Lite and...
  18. J

    DarkAero

    Personally, I'm really excited to see these guys building a new company with what seem to be relatively novel design concepts. A note on the money discussion: If they aren't asking for investors or preorders, why does it matter where the money comes from? Let's support people pushing boundaries...
  19. J

    new battery from lithium ion inventor

    Oh, you mean like California trying to get people to schedule their charging times so that the grid can maybe stand a chance of keeping up after they just banned ICE vehicles after 2030/2035?
  20. J

    new battery from lithium ion inventor

    I think you meant to say "Elon's marketing", but yeah. We aren't ready for a full switch to electric yet for a variety of reasons, but the marketing arm of Telsa is astonishingly good and the general public is astonishingly poorly educated.
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