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  1. Giggi

    Rules for building scale model that flies like full-size plane?

    I recall reading a thread here some time ago in which someone detailed a procedure for designing a 1/3 scale rc plane to give it "degraded" flight characteristics so it performs more like a full-scale version than a typical model, despite the lower reynolds numbers. Mainly it used some...
  2. Giggi

    Can wood be vacuum-infused?

    So here's my thinking. Wood (assuming it's a high-performance species like spruce) is a much better structural material than fiberglass composite by almost every metric... in theory. In reality, wood's mechanical properties are dependent on its natural grain structure and resin content, and...
  3. Giggi

    The Supercritical Carbon Dioxide Engine - Thoughts?

    Firstly, a short description of supercritical carbon dioxide (frequently abbreviated as “sCO2”) for people like me who aren’t chemical engineers: Carbon dioxide goes supercritical when it is subjected to pressures and temperatures exceeding those of its critical point: ~7.4 MPa (~1070 psi) and...
  4. Giggi

    Flying Squids?!

    So I was doing a little research on marine animal hydrodynamics today, and I stumbled upon this image: Excuse me, what? So I googled "flying squid" and found a grand total of about 20 photographs of these things, most of which appear slightly less than realistic... Naturally, I couldn't...
  5. Giggi

    Real-life, man-carrying, actually flying hoverbike. Yup.

    So remember that Malloy Aeronautics company from a few years back? (HBA thread: https://www.homebuiltairplanes.com/forums/hangar-flying/10444-hoverbike.html) The guys who said they needed over a million bucks just to get this ugly-arse thing flying? And who've managed to make a deal with the...
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