Recent content by copec

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  1. copec

    Experimental Ducted Fan Aircraft Designs

    I definitely think Malish needs to integrate a faux jet exhaust LED lightshow into the rear of the ducts.
  2. copec

    Experimental Ducted Fan Aircraft Designs

    I haven’t. I’ll check it out.
  3. copec

    Experimental Ducted Fan Aircraft Designs

    Very good point! Theoretically as the circumference grows, the flux is spread over more area and is less dense as with the amount of corresponding ferromagnetic material. In a practical sense I doubt the same weight could be kept and it would be substantially heavier as you point out.
  4. copec

    Experimental Ducted Fan Aircraft Designs

    I'm interested in a custom motor rim drive ducted fan, like the water propulsors:
  5. copec

    Simple design for pressurized Sailplane

    I believe due to the extended missions and stress of doing active ground support vs Cold War intelligence gathering. I found an article: Killer at 70,000 Feet I have seen a fellow PADI scuba diver get the bends not close to the dive limits, and that risk is relatively small with such a huge...
  6. copec

    Simple design for pressurized Sailplane

    There are a not insignificant number U-2 pilots that have experienced decompression sickness or the bends from operating at the pressure altitude of 29k feet in their cabin (and suits). There was a hard rise when they began much more active and stressful missions over Iraq and Afghanistan...
  7. copec

    Experimental Ducted Fan Aircraft Designs

    I am the type of person that likes to pose and discuss ideas. I love your plane, and it exists! Mine doesn't even exist! :-P So I am NOT saying you SHOULD do something, or that you should have done it some other way. I am just floating ideas according to my understanding to learn from the replies.
  8. copec

    Experimental Ducted Fan Aircraft Designs

    https://motoiq.com/project-s2000-part-19-ram-air-plus-hot-air-testing/
  9. copec

    Experimental Ducted Fan Aircraft Designs

    I've followed the ul-39, and when the https://www.pbsaerospace.com/our-products/ts-100-turboshaft-engine came out, it seemed like they should do something experimental with it and the ul-39, even though that isn't EASA UL category. It looks like they might work something up like that as they...
  10. copec

    Experimental Ducted Fan Aircraft Designs

    Is there an efficient way to put the heat into the stream after the fans for a theoretical boost in thrust? Like aluminum tube wrapped around an aluminum portion of duct? Edit: Also, FWIW, the original study with the https://en.wikipedia.org/wiki/North_American_YF-93 shows that the submerged...
  11. copec

    Ducted fan aircraft

    Could two four cylinder engines fit side by side in the engine compartment?
  12. copec

    Ducted fan aircraft

    I agree, but I enjoy thinking about things disconnected from actually implementing it. I know that probably drives some people a little crazy.
  13. copec

    Ducted fan aircraft

    This is pure thought experiment versus an actual suggestion, but he does have two fans, so two separate engines could be considered - although it would fundamentally change the airplane. There are a lot of 4 cylinder diesels.
  14. copec

    Ducted fan aircraft

    IMO It needs a better muffler on the engine, and perhaps to eject the exhaust into the ducted fan airstream.
  15. copec

    What do you think about "e-soaring"?

    Do you have a thread or anything on it?
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