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  1. SkyBox

    Low aspect ratio sport plane ideas

    Check out this article published in Air Facts Magazine: https://airfactsjournal.com/2023/01/loss-of-control-turning-over-a-new-leaf/
  2. SkyBox

    Low aspect ratio sport plane ideas

    Check out this article: https://airfactsjournal.com/2023/01/loss-of-control-turning-over-a-new-leaf/
  3. SkyBox

    Very low aspect ratio planes?

    captarmour, The need to have elevator authority down to 0.85 X Stall is an FAA Reg for LSA cerification.
  4. SkyBox

    Very low aspect ratio planes?

    captarmour, Thanks for the info. The SkyBox's wing-body has a sweeps of 45 degrees increasing to of 55 degrees +/- 48 inches of the centerline. I'll try increasing the outer section to 60 degrees. At present, it doesn't really stall. At high AOA's it doesn't break, it just runs out of...
  5. SkyBox

    Very low aspect ratio planes?

    captarmour, I agree with you that the interference should augment lift. I hadn't thought about the distance between the canard and the wing-body creating a slotted wing effect.
  6. SkyBox

    Very low aspect ratio planes?

    captarmour, Thanks for the sketch. Do you think the tip vortices of the canard will augment the main wing's lift in cruise and act like vortex generators to delay onset of stall?
  7. SkyBox

    Very low aspect ratio planes?

    captarmour, I'm intrigued by the slotted wing idea. Could you post a sketch of your concept?
  8. SkyBox

    Very low aspect ratio planes?

    wizzardworks, Steve Hatfield corrected this problem for me on X-Plane.org. If you try downloading the Climb Axe Turbo again, it should work.
  9. SkyBox

    Very low aspect ratio planes?

    captarmour, The elevator forces when the COG is at the aft limit are much lighter than at neutral or forward limit for cruise, slow flight and hign G flight. This is true whether the plane is at 1320 or 1600 lbs. 20
  10. SkyBox

    Very low aspect ratio planes?

    captarmour, As far as stability, in X-Plane 9.70 the loading envelope was defined by: a) ability to raise the nose @ IAS 85% of stall speed and b) ability to break a stall with forward stick. At extreme aft COG, the elevator forces are much lighter than at neutral or forward limit COG's. If...
  11. SkyBox

    Very low aspect ratio planes?

    Thanks, I will check the "data out" options.
  12. SkyBox

    Very low aspect ratio planes?

    The canard, wing-body and stabilizer all produce lift. The 'main wing' alternates, passively, between the canard and wing-body. In high speed cruise the canard predominates. As AOA increases the wing-body bears most of the total load. Another way to think about it is that I was interested in...
  13. SkyBox

    Very low aspect ratio planes?

    The center of gravity is between the seats. I am a medical person and do well when it comes to vocabulary, but am speechless when it comes to computational aerodynamics. The design process that I went through trial and error. Initially, I tried to recreate the Facetmobile, but found that it...
  14. SkyBox

    Very low aspect ratio planes?

    BBerson, Thanks for your reply. If you look at the screenshots labeled 1g and 9g, the lift vectors for each wing and the total lift vector are seen as green arrows (taken in X-Plane 9.70). At 1g, the canard is doing the vast majority of the lifting. I think of it as 2 men carrying a...
  15. SkyBox

    Very low aspect ratio planes?

    Re: SkyBox Matthew, Thanks for the feedback. A major problem with designs like the facetmobile is its very low wing loading (<4 lbs/sq ft). This makes it very uncomforable in turbulence, especially at high speed. The purposes of the canard and stabilizer are to make the ride smoother...
  16. SkyBox

    Very low aspect ratio planes?

    SkyBox
  17. SkyBox

    Very low aspect ratio planes?

    BBerson, I'll be happy to send images. My email is [email protected] Send me an email and I'll reply with images. The fiberglass cast was set by water. It comes in a wide variety of sizes. One or two inch wide strips could be wrapped around ends of fiberglass tubes to make joints for...
  18. SkyBox

    Very low aspect ratio planes?

    captarmour, Thanks for your reply. If you look at my profile there is an album titled SkyBox LSA. The pics are there.
  19. SkyBox

    Very low aspect ratio planes?

    BBerson, Thanks for your reply. The usual methodologies involve welded 4130 steel or bolted aluminum tubings. Pultruded fiberglass or carbon fiber trusses/frames require connectors and glue/epoxy. Maybe custom connectons could be made from 3M prepreg fiberglass casting material? I have...
  20. SkyBox

    X-Plane!

    Synergy, Thank you for your very thoughtful and informative response. This was my first post on this website and I am a complete novice. In building a radio control model you recommend a 50% scale. By that, you mean that if the actual wingspan is 15 ft the model's wingspan would be 7.5 ft...
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