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  1. A

    remote controlled circuit breakers: ?what options exist

    While some do not like the idea of resetting circuit breakers in flight, I am sure they will hate this idea. Self resetting circuit breakers and a remote switch (relay).
  2. A

    Lift theories

    The total change on the top and bottom are not the same unless you are incorrectly using scalars instead of vectors. Circulation is just a mathematical construct to try to understand a vector math problem using scalar math. Using vector match, that or any mathematical crutch is not needed. Also...
  3. A

    Lift theories

    Integrate over the surface. Again, I direct your attention to Newton but throw in some Leibniz. If you do "The Calculus" you get exact answers and if you do it discrete, you get computational fluid dynamics. The velocity above a wing does not need to be "higher". It just needs to be changing...
  4. A

    Lift theories

    Actually, it is simple to derive Bernoulli's equation from Newton's basic equations/laws. The WHOLE and ONLY problem people keep having with Bernoulli's is they try to apply it to a 2D or 3D problem using scalars and not vectors. Keep in mind speed has just magnitude but velocity has magnitude...
  5. A

    Counterfeit Parts Warning

    The knockoffs had a very short life. For us the only somewhat reliable way to tell the difference was in the diameter and length of the center electrode.
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    Counterfeit Parts Warning

    I know everyone loves to bash China but keep in mind that today, MOST real Bosch injectors are made in China. Bosch has multiple injector plants in China and makes most of their automotive electronic parts in China. The problem is counterfeit parts and not just China. Yes, many counterfeit...
  7. A

    Now, GPS can tell you which seat you're in. And even which direction you might be leaning.

    I remember worrying about loosing my sectional and being totally lost...
  8. A

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

    If I was going to develop a small turbofan (I am not), I would start by looking for a couple of off the shelf turbochargers that work with the required flow, pressure ratios, etc. I would then cobble together a test engine just using the turbos as is in series with very round about plumbing and...
  9. A

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

    How about a small turbofan engine. Maybe use 2 stages of centrifugal compressors for an overall pressure ratio of about 9:1. Then drive a fan with about a 2:1 bypass ratio. If done right, this should have about 0.6 lb/lbf/hr fuel consumption. This would make small jets practical and could be a...
  10. A

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

    I first heard about the Zoche in the early 1990's so I think it has been over 30 years. If someone wants to spend many millions on a new from scratch engine development project I suggest something along the lines of this: Napier Deltic - Wikipedia
  11. A

    Stroker engines in airplanes

    I think parallel valve 180hp Lycoming IO-360's are also heat limited. Yes, you can get more power but you start having heat issues if you try to use this power continuously. Even at 180hp, you need to run rich of peak power for cooling considerations. It is my understanding that the angle valve...
  12. A

    Pushers...way to go ?

    There are a lot of boats that use "tractor" props for more efficiency: https://www.wartsila.com/encyclopedia/term/azipod-(azimuthing-podded-drive) https://www.volvopenta.com/en-us/marine/leisure-boating/powerboat-solutions/forward-drive/ Having a prop in clean air (fluid) is an efficiency...
  13. A

    21st century Volksplane?

    The most important aspect of a “Hoerner” tip is the trailing edge must be the longest part of the wing. Look at the Grumman AA1's and AA5's for examples. Actually longer than the leading edge or even the mid cord is best. Depending on the "sweep" of the tip, the first about 1/4 cord should be...
  14. A

    Aircraft Hangar Lift Help

    Most (all?) single side boat lifts use aluminum I beams for the vertical. Larger ones use 2 but smaller ones use one and some of these still have 3000 lb capacity. They also tend to only use the one flange for the rollers and some even just use low friction plastic blocks.
  15. A

    Horrible news from Vans Aircraft

    Has anyone looked into drilling out the laser holes to the next size rivet hole?
  16. A

    21st century Volksplane?

    Then why not just build a VP-1 or VP-2 maybe using a little CAD/CAM? Why call it a "21st Century" Volksplane?
  17. A

    21st century Volksplane?

    To some extent, I think we are all missing the concept of a "21st Century" Volksplane. The original VP-1 first flew in 1968. At that time a VW engine was about 58hp and the VW Beetle was a very simple 1800 lb car with roll up windows, no AC, no cruise control, no airbags, etc. And a top speed...
  18. A

    Horrible news from Vans Aircraft

    My predications: By SnF, Van's will be fully back and running at top speed. There will be a 15% to 25% increase in most prices. The RV-15 deliveries will launch and it will be a huge success. The production issues will be sorted and more in-house. The delivery times will increase. There will be...
  19. A

    Spitfire

    Keep in mind that we did it first to the Europeans.
  20. A

    Stainless Steel Firewalls

    Intumesent paint. It really is amazing.
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