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  1. fly2kads

    Concepts only: Doodles without numbers

    Yes, I have. At the risk of thread drift, my answer is "it depends." Fortunately, there are software tools available to us now (for free, even!) that allow us to model the behavior of a wing with a high degree of accuracy, no guesswork required. Rules of thumb can serve as a starting point, but...
  2. fly2kads

    Concepts only: Doodles without numbers

    Yes. Just yes! I have daydreamed and doodled my own little Moustique variants for a looong time.
  3. fly2kads

    The Johnson Twin 60

    I am amused by the claim that it "does not build up to the 'whistling' speed in a dive." In other words, it is so draggy that it is not going to build up any speed, ever. ;) I do think it is pretty cool, though!
  4. fly2kads

    Looking for wheel fairing plans

    One of Mike Arnold's videos has a pretty good "how to" on fabricating wheel pants:
  5. fly2kads

    Basic Calculations

    Here are the Roncz materials, as compiled by our very own RTFM: https://www.homebuiltairplanes.com/forums/threads/the-roncz-spreadsheets-eaa-1989-1991-with-notes-formatting-and-some-additions-by-duncan-meyer.47126/
  6. fly2kads

    Modified Corby Starlet

    Cool...but how on earth did he get that thing to balance? And beefed up how? So many questions....
  7. fly2kads

    Calculating Wing pitching moment/torsion using Cm?

    I'll put in a plug for OpenVSP. I am using it for my slow-running project, and I'm finding it a very capable tool. It has a bigger learning curve than XFLR5, but makes better sense logically (to me, anyway). XFLR5 feels a bit cobbled-together to me. OpenVSP has a lot of features above and beyond...
  8. fly2kads

    A Clement built W-10 is resurrected

    That makes boxy look sexy!
  9. fly2kads

    Calculating Wing pitching moment/torsion using Cm?

    One of the convenient things about the TOWS is that it presents the cm data both ways. The subscripts are kinda small and hard to read, but the left plot (p. 540) is for the moment about the quarter chord (cmc/4), and the right plot (p.541) is for the moment about the aerodynamic center (cmac)...
  10. fly2kads

    Ross RS-1 and RS-2L

    That looks like a fun little flivver!
  11. fly2kads

    Yet Another Weird AirPlane Aeroput MMS-3

    I kinda like it! I'm sure the visibility made it fun.
  12. fly2kads

    Scary ...

    Another puzzle: Steve Wittman's "Vee Witt" Formula V racer used a similar scheme. The root end of the spars have notches on them that fit into little sockets on the side of the fuselage, and the brace wires hold the wings on. It was good for 180mph and 6 Gs! The Vee Witt had an appropriate load...
  13. fly2kads

    Ultra-Efficient Products Penetrater, and you thought the Wee Bee was minimalist

    The pilot doesn't even appear to be strapped down in an any form or fashion. o_O
  14. fly2kads

    E-Racer Blended Winglet and Interference Drag CFD Analysis

    I was curious about winglet design a while back, so I did some reading, including several papers by M.D. Maughmer of Penn State, who did a lot of the early work to make winglets for sailplanes. He had a pretty standard caution that he included in all of his writings from that time: that it's...
  15. fly2kads

    Crashes in the News - Thread

    We had a fatality accident in the area that sounds suspiciously like "suicide by airplane." A young man took a flight school 172, and after takeoff told ATC that he wasn't going to follow their instructions and that he was going to pull the circuit breakers for his comms. A short time later, he...
  16. fly2kads

    You picked a fine time to leave me Loose Wheel

    Nice job on the thread title! Now I'm going to have that song stuck in my head the rest of the afternoon.
  17. fly2kads

    Stroker engines in airplanes

    I don't think that's what he said, but the lack of punctuation makes it hard to tell. I read that as two separate statements: produces 83 hp; and he cruises at 26 in. MP. Top end vs. cruise setting. Perhaps veldragon can clarify....
  18. fly2kads

    Short Moto-Soaring Wishlist

    I think I would enjoy some old-school wooden sailplanes, just for fun. The Hall Cherokee II is reportedly a hoot to fly. I've always had a thing for the Briegleb BG-12, particularly the B model. I keep looking from time to time, but haven's seen plans for that one come up anywhere.
  19. fly2kads

    Ideal horizontal Stabilizer location?

    I pulled out my copy of the book, and took a look at the referenced section. (The example in the OP is from an appendix of example equations, which refers back to the chapter covering trim and stability. To answer the original question, the factor referred to as stabilizer efficiency is, as...
  20. fly2kads

    Discussion: Design Log for 2-Place Touring Plane

    As someone else in your shoes, designing an airplane while learning the skills along the way, I totally get where Billski is coming from. When I designed my own RC airplanes, it was like building the model twice. This is much worse. Is it fun to learn new things? You bet! Is it satisfying to see...
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