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  1. Rktman

    AeroDagger Cranked Arrow Build

    IDK, maybe the physics of a plane that much larger isn't quite the same?
  2. Rktman

    AeroDagger Cranked Arrow Build

    To lessen any tendency to loop, especially with the "flapped" version 1, I built the pop pod so that the boost CG falls right over the canard wings. I want to build a final "high wing" version (fuselage on bottom) because it's so much easier to apply the exhaust protection tape on the flat top...
  3. Rktman

    AeroDagger Cranked Arrow Build

    Excerpt: "An additional reason for using swept or delta wings is that they exhibit a beneficial dihedral effect. When an airplane is in a roll, it tends to side-slip to the inside. Dihedral creates a rolling moment, tending to roll the airplane upright. Swept and delta wings exhibit this...
  4. Rktman

    AeroDagger Cranked Arrow Build

    No worries, deltas don't require dihedral. Deltas that come to mind that fly sans dihedral: the Modelrockets.us Quick Fly, Estes Gryphon, and Edmonds CiCi, Ecee, and Deltie. Coincidentally they even have top-mounted fuselages.
  5. Rktman

    AeroDagger Cranked Arrow Build

    Suggestion on what I can do on the version 2 model since the fuselage runs above the wing surface? High-heat paint? Trying to manhandle that sticky tape would be a nightmare; it wrinkles with the slightest bend and once any part touches the surface it sticks tenaciously and is almost impossible...
  6. Rktman

    AeroDagger Cranked Arrow Build

    Put in some protection from the blast of the motor exhaust with self-adhesive aluminum duct tape. Works well but it’s a major PITA to get it to lay down smoothly. Final result covers up a lot of the visual interest (the internal framework) but better that than starting a grass fire from a...
  7. Rktman

    AeroDagger Cranked Arrow Build

    Version 2 is done: lighter forward fuse, airfoiled canard, top-mounted fuselage, and a closer match to the prototype. Ver 1 vs Ver 2: Did some trimming tosses this morning and the revised version #2 only needed a tiny 0.09g dot of tail weight. Quite happy that the changes made a very...
  8. Rktman

    AeroDagger Cranked Arrow Build

    I decided to trim off a bit more weight by using a lighter xerclod/piece X pod mount rather than Apogee’s cast plastic glider pod hook like I usually do. (The small balsa piece X weighs in at only 0.10g vs the plastic glider hook’s 1.2g). One thing I gotta recommend adding to anyone’s toolkit...
  9. Rktman

    AeroDagger Cranked Arrow Build

    Forgot to take shots of my version #2 build up to this point. It was basically a repeat of what I did earlier anyway. I’m at the stage of assembling everything. Did the best I could putting an airfoil on the 1/16” balsa canard. This shot is a bit low contrast, hope you can make out enough of...
  10. Rktman

    Best method to bend balsa

    Didn't have to soak the 1/64" ply, it bent very easily around the form. I kept the excess overlap and glued it together rather than trimming the ring ends to the exact diameter and doing a butt joint, because the butt joint tended to bow outward too much. Here's something you might want to...
  11. Rktman

    Performance glider scratch-build: delta wing or traditional/swept wing planform?

    Couldn't resist tweaking the glider a bit more. Since the stab's incidence ended up being possibly a tiny bit too much at 1.5 degrees, I heated the trailing edge and was able to bend a minuscule amount of downward angle into it to try to compensate. Also set the CG a few mm back to where it was...
  12. Rktman

    AeroDagger Cranked Arrow Build

    Per your first article: "The designer has typically arrived at a design by the built it, fly it and then build another one with some small improvements". I'm strongly considering doing just that with this build and the Icarus build to get both gliders as close to optimum as possible. Call it...
  13. Rktman

    AeroDagger Cranked Arrow Build

    Having the same problem with my clone. Fortunately I acquired an original in- the-bag kit and I'm looking forward to building and flying it to see if it flies any better, and if so, why?
  14. Rktman

    AeroDagger Cranked Arrow Build

    The Swinger was simply an example of apparently using dihedral in the stab vs the wings in answer to BABAR'S question.
  15. Rktman

    AeroDagger Cranked Arrow Build

    How much pod downthrust would be required to compensate, an amount equal to the flap angle? If the flap's angle is 1.5°, would a pod angle of -1° be enough? Or would that be too much? I built in a -1° angle in my pylon but if it's insufficient I could always remove and resand the pylon in a...
  16. Rktman

    AeroDagger Cranked Arrow Build

    I prefer vertical rudders, as I've tried the "tilted rudders" (aka V-tail) and they needed to be larger than a vertical rudder to provide the same amount of yaw control. That being said, if a design could benefit from more aft weight, I believe a larger V-tail would add dihedral. For example...
  17. Rktman

    AeroDagger Cranked Arrow Build

    Yup that looks like what I saw. Happily it doesn't do it anymore since I increased the size of the rudder to match what was on my prototype.
  18. Rktman

    Performance glider scratch-build: delta wing or traditional/swept wing planform?

    Reversing the wing might be an interesting experiment on down the road. For now I'd like to perfect this design. It gets easier after building the first.
  19. Rktman

    Performance glider scratch-build: delta wing or traditional/swept wing planform?

    That could very well be, especially the latter. I’ll probably build another after its first couple of flights, keeping a more careful eye on stab incidence.
  20. Rktman

    AeroDagger Cranked Arrow Build

    I’m not really liking having to add that flap on the aft end. It's been bothering me since it's more a band-aid fix rather than an optimized design. So I decided to build a revised version #2, this time with a thinner forward end and a top-mounted fuselage that more closely duplicates my...
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