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  1. K

    MOSAIC Rule Change

    Yes, I've seen that argument, but the C-150/152 (on which I trained) have the same 10 psf wing loading of many of the popular LSA kits (and a worse power loading).
  2. K

    speed: 2 vs 2L

    Looking at the plans again, I see I need to correct that assertion. The spar in the Sonerai is not at the thickest point of a 64A212 airfoil. For the same spar depth, it looks as if you might move the spar forward maybe 3-3/4" in one of the turbulent airfoils.
  3. K

    MOSAIC Rule Change

    From the NPRM: "eliminating weight limits for light-sport category aircraft would provide manufacturers opportunities to... Incorporate additional safety-enhancing designs and equipment" As for the effect of the light weight of the original LSA: "The FAA views the safety record of light-sport...
  4. K

    MOSAIC Rule Change

    It will be interesting to see the effect these rules, if accepted, will have. The FAA thinks a V.S1 of 54 kt will serve to adequately limit top speed and weight. Why not just limit wing and power loadings, say 12 or 13 for each? A 54 kt clean stall will make for hot landings in airplanes sans...
  5. K

    bungee gear geometry

    At OSH this week, I peered into an E-2 Taylor Cub. Owning Wagabond plans, I was surprised to see only a single lateral tube connecting the wing struts, as in the Tailwind. The Wagabond has a steel truss here because the landing gear bungees attach to the middle of the fuselage. Looking under the...
  6. K

    Wag Aero Wagabond

    Should be something under 2 ft, based on the published dimensions of the Vagabond and the Colt.
  7. K

    speed: 2 vs 2L

    "... it would be difficult to detect." As I guessed, and you and Monnett should have the most empirical knowledge about this. "... inseam length of more than 28” you won’t fit in a mid-wing Sonerai II..." For those with a longer inseam wanting a mid-wing single, switching to a turbulent...
  8. K

    speed: 2 vs 2L

    Given my height, I would have to go L, so this question is only out of curiosity, but is a 2 faster than an otherwise similar 2L? Of the 3 wing locations (low, mid, and high), I've read mid is the most efficient, but I've not read if it matters much. Given the speed of the faster 2L's, I have...
    • KWK
    • Thread
    • Replies: 7
    • Forum: Sonerai
  9. K

    a Sonerai III ?

    Thanks for the visualization. It was only in my mind's eye before.
  10. K

    a Sonerai III ?

    The carry through spar looks to be loaded in bending only, so the length affects only column buckling of the top and bottom members of the spar. One should be able to do that calculation pretty easily. Come to think of it, I have a copy (probably loaded off this web site) of a design manual...
  11. K

    a Sonerai III ?

    Because I already have the Sonerai plans? Of course, I also have the Tailwind plans which I purchased from Wittman the same year, and which lead me to forget about the Sonerai plans. Some rides since then in low wing airplanes have made the Sonerai tempting again. Okay, I admit it's mostly just...
  12. K

    a Sonerai III ?

    Digging through a box in the closet, I came across a II-LS(T) plans set I bought in 1993. I thought I'd given those away about 20 years ago. Looking over the plans I see an admirably simple airplane. I'd have to make some adjustments for headroom, but I could probably fit in this thing...
    • KWK
    • Thread
    • Replies: 12
    • Forum: Sonerai
  13. K

    Issue with Sonerai Plans

    I checked the Drawing Revisions page, which covers changes since Sonex acquired the plans. Has anyone compiled a list of changes over the years? My set was acquired in late 1993, according to the post mark, and was shipped from Sterba.
  14. K

    Issue with Sonerai Plans

    Well, that's weird. I listened to some webinar with Monnett and I thought I heard him say these are the old plans printed in a larger format. My 1993 set of 2LS plans show 1/4" holes there.
  15. K

    V - Witt / Witts V

    That's an interesting attachment to the fuselage frame of the flying wires. How goes your project?
  16. K

    wood basics video.

    The section on grading starts at about 5:46. A discussion of glues follows at 10:10, but it's pretty much limited to epoxy.
  17. K

    Whats the theorical speed limit (Vne) of a fabric aircraft?

    The first series of the Hawker Hurricane were so. They could exceed 300 mph in level flight. I imagine several pulled over 400 mph in dives in combat.
  18. K

    PolyFiber minimums

    At about what temperature should I worry about burning on? For the flattening process, they recommend 200 to 225 F.
  19. K

    PolyFiber minimums

    Hmmm, I had the impression everything in the PolyFiber process dissolved in MEK. Good to learn it's not so, before getting in to trouble.
  20. K

    differences in Dacron

    Okay, I've located an older copy of the Oratex factory's manual, dated 2015. It says the glue layer will fail near 300 F. Dacron melts closer to 500 F. So, I'm not sure why BAF said it was unlikely to work. I'll look further. Thanks again. appended: Here's removal of Oratex with a heat gun...
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