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  1. U

    Cycloidal Propellers for Aviation, and a Concept to Optimize Them

    Thanks aircar, I have just about everything already on that. My idea was to incorporate the DCFJ concept (Discrete Co-Flow Jet) to cycloidal rotors, increasing lift and angle of attack, and at the same time reducing drag.
  2. U

    Cycloidal Propellers for Aviation, and a Concept to Optimize Them

    Yea, you know, what the thread was about to begin with?
  3. U

    Cycloidal Propellers for Aviation, and a Concept to Optimize Them

    Yes, I am aware, and I had hoped my suggestions to optimize them would increase that even further. Since then I came up with a new idea of using whale turbicle like bumps on the front edge of the blades to increase their angle of attack. That would be a system that wouldn't require the internal...
  4. U

    Cycloidal Propellers for Aviation, and a Concept to Optimize Them

    I was surprised to see anyone expressing any interest in this concept and responding to this thread so long after I initially posted it. I must apologize, life intervened in my plans to create drawings for this idea. I was working on this while I was unemployed, and once I found work I had to...
  5. U

    Cycloidal Propellers for Aviation, and a Concept to Optimize Them

    I was referring to the post after Normans.... And I am open to all ideas, as long as they do not attempt to redefine my project here. Those kinds of things belong in their own thread don't they? According to the rules of the forum? And the whole point of my concept here is to get rid of the...
  6. U

    Cycloidal Propellers for Aviation, and a Concept to Optimize Them

    This thread is about cycloidal propellers for aviation, and my idea to make them more feasible. Please feel free to start your own threads about your own ideas, but please stay on topic in this thread. I see a lot of people viewing, and yet very few responses, so please resist the urge to post...
  7. U

    Cycloidal Propellers for Aviation, and a Concept to Optimize Them

    I personally see a confluence of various technologies in this concept that make too much sense to ignore. Of course, I did not come up with the discrete co-flow jet technology, and I salute those researchers who did. I think I will attempt to contact the authors of the papers I have posted to...
  8. U

    Cycloidal Propellers for Aviation, and a Concept to Optimize Them

    I found a more recent paper about discrete co-flow jet airfoils here http://www7.miami.edu/ftp/acfdlab/publications/AIAA-2011-941-884.pdf They specifically mention that it can be utilized in rotors, though I doubt they envisioned exactly the kind of rotor I intend to use it with. The amount of...
  9. U

    Roadable Aircraft DESIGN

    That setup you describe sounds anything but practical and workable, but who knows. I would just employ discrete co-flow jets on those smaller airfoils, and set them up like in that photo. That way you don't have airfoils flying in downwash as you described, you have reduced drag, and greater...
  10. U

    Cycloidal Propellers for Aviation, and a Concept to Optimize Them

    After giving it some thought, I now think that the suction air returning inward through the rotating blade discs (what I referred to previously as the hubs) will simply result in a slightly higher level of friction between the air and ducting where the air flow must fight the centrifugal forces...
  11. U

    Cycloidal Propellers for Aviation, and a Concept to Optimize Them

    My current focus on this project is to determine what efficiency losses can be expected from ducting. The pressurized airstream will make three or four 90 degree turns with in the ducting and cycloidal rotor hubs, as will the return suction airstream. There is also the issue of dealing with...
  12. U

    Roadable Aircraft DESIGN

    So no is the answer then?
  13. U

    Roadable Aircraft DESIGN

    Has anyone seen an aircraft with this multi thin wing louvre setup actually fly? I am not able to translate the russian on these pages, so if anyone knows if these are operational, or have more info on this design, please post.
  14. U

    Cycloidal Propellers for Aviation, and a Concept to Optimize Them

    I want to point out I also recognize plasma actuators could be used in this application in the place of blowing/suction to help control stall and drag. I have posted about plasma actuators before, as in the synergy thread. They are still under development, though they do show great promise. If...
  15. U

    Cycloidal Propellers for Aviation, and a Concept to Optimize Them

    One thing I forgot to mention earlier: If discrete co-flow jets could indeed power the rotation of the cycloidal propellers adequately (lets assume for the sake of discussion we are talking about one CP extending out from each side of the fuselage), there would be no need to compensate for...
  16. U

    Cycloidal Propellers for Aviation, and a Concept to Optimize Them

    I do understand this is an off the normal path kind of topic, and certainly mean no insult to the forum in general.
  17. U

    Cycloidal Propellers for Aviation, and a Concept to Optimize Them

    No sour grapes here, but I thought I would be getting a little bit more technical input/feedback about this concept. I have posed several questions, but no comments let alone answers to them. I see readers piling up, but not many posts, and wonder if I should post further due to lack of...
  18. U

    Cycloidal Propellers for Aviation, and a Concept to Optimize Them

    So if one is utilizing discrete jets in this co-flo application, as I discussed in my previous post, this would allow for 3D printing of a relatively short airfoil span (1 meter or less). You would need to increase the depth of the medium "tank" where you were forming the 3D airfoil so you could...
  19. U

    Cycloidal Propellers for Aviation, and a Concept to Optimize Them

    Next up, an idea for using 3-D fabrication methods to form blades for testing purposes, and proper suction slot design for this application...
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