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Scale Byron Glasair Build

Discussion in 'Giant / Scale Scratch and Kit Build Threads' started by TonyHallo, May 22, 2019.

  1. 49dimes

    49dimes Damn I'm hungry

    Big congrats on SUCCESS!! She's a beauty to boot :way_to_go:. Impeccable workmanship!
    WMcNabb likes this.
  2. TonyHallo

    TonyHallo 70cc twin V2

    Today decided to lean out the top end using the telemetry temperature as a guide. First flight base temperatures were on the order of 240f. It was pretty fat on the top end so it picked up about 800 rpm on the ground. After a minute or so in the air, the right wing separated from the fuselage resulting in the photo below. Not much left :ugh:. It did make a rather loud pop when the spar let loose, in hind site bolts in front of the spar would have prevented the failure. The failure occurred straight and level flight at full throttle. I do have a spare fuselage but lack windows, hope I can find a set someday.

  3. Ugh. :(
    49dimes and dhal22 like this.
  4. AKNick

    AKNick 150cc

    :ooh?: oh no... sorry man, what a drag.:frown_gif:
    pawnshopmike likes this.
  5. Pistolera

    Pistolera HEY!..GET OUTTA MY TREE!

    Damn...hate to see that!
    pawnshopmike likes this.
  6. Snoopy1

    Snoopy1 640cc Uber Pimp

    Sorry to see that, way to soon.
    pawnshopmike likes this.
  7. 49dimes

    49dimes Damn I'm hungry

    I don't think "Easy come...Easy go" quite describes what has happened here. Maybe the "Easy go" part.

    Darn shame :ugh:.
    TonyHallo, Snoopy1 and pawnshopmike like this.
  8. Jetpainter

    Jetpainter 640cc Uber Pimp


    Since I am now the proud owner of a Byron p-51 with plug in wings, is there anything I need to know just to be on the safe side?
  9. TonyHallo

    TonyHallo 70cc twin V2

    IMG_1926.JPG The wings were redesigned to reduce weight, the wings were foam ribbed using 1/8" plywood joiners that lapped a bulkhead inside the fuselage. Four #8 cap screws joined the wings. Each complete wing weighted 1# 10 ounce completed, of course it didn't work! I would image if I made the joiners out of 45 degree plywood it would have worked out, that was my first thought when I looked at the failed joint, there was really only 1/16" of wood doing the work. I would also add a dowel bolts to the front of the wings . The plane flew very well, actually after the first few flights I learned it would slow down rather nicely.

    I would not worry about the Byron design, I have seen many different Byron models over the years and never seen or heard of a failure other than stripping the treads on the aluminum extrusions. My friend had a G62 in his Glasair and put through the paces without failure.
    Jetpainter likes this.
  10. Jetpainter

    Jetpainter 640cc Uber Pimp

    Thanks! I bought this P-51 at a club auction and have yet to even look at it. I brought it home sat it down and so far that's been it.
    It's never been flown, but it's decades old.

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