Decalage angle

Discussion in 'Aircraft Design / Aerodynamics / New Technology' started by Eugene, May 29, 2017.

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  1. Oct 4, 2019 #1401

    Eugene

    Eugene

    Eugene

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    fullsizeoutput_18a2.jpeg
     
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  2. Oct 5, 2019 #1402

    Eugene

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    In terms of outright top speed, the black marlin is the fastest fish in the ocean capable of accelerating to an unbelievable 129km/h (80mph)

    Screen Shot 2019-10-05 at 12.03.28.png
     
  3. Oct 6, 2019 #1403

    Tornado Flyer

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    How do you plan to remove that foam from your paint?
     
  4. Oct 6, 2019 #1404

    Eugene

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    I don’t know, not concerned about it at this point. I wouldn't start this project if I was concern about paint. I’m sure something like sandpaper will work just fine. If I ever get to final configuration that I like, then I will paint the whole airplane. But for now, For at least the next 10 years you will see me flying to Oshkosh only with primer at best. Sorry, I just don’t have any another ideas.
     
  5. Oct 7, 2019 #1405

    Eugene

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  6. Oct 8, 2019 #1406

    TFF

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    I’m assuming that’s a special laminar surface treatment. Is there a patent?
     
  7. Oct 8, 2019 #1407

    BBerson

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    What does that foam weigh?
     
  8. Oct 8, 2019 #1408

    Eugene

    Eugene

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    I knew that somebody would like that picture. I will need to spend a lot of time sanding and cutting, before this project will look like real thing. But general shape already here, so hard part is over.
     
  9. Oct 8, 2019 #1409

    Eugene

    Eugene

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    We will find out after I shape it in to something I like. Will need to do weight and balance anyway to find out how heavy ballast will be needed for CG to be at 30% or so.
     
  10. Oct 8, 2019 #1410

    Eugene

    Eugene

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  11. Oct 10, 2019 #1411

    Eugene

    Eugene

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    8F429254-DE9B-42B9-AC6E-250CE985231B.jpeg

    I have this question in my head for some time about compensation for right rudder. Wondering if I can add 1/2 of symmetrical airfoil to my vertical stabilizer. Wondering if people do this instead of changing angle. This piece can be CNC made from foam with different thickness to try it out until correct one found. 1/2 of 6% or 8% airfoil can be used to start with.
     
  12. Oct 12, 2019 #1412

    Eugene

    Eugene

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    My answer arrived from Russia. I was told to make sure to install it on correct side of vertical stabilizer. Also left side can get 8% or 10% airfoil and right side 6%. Aerodynamically this will be better approach.
     
  13. Oct 12, 2019 #1413

    Eugene

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    This is what I did in two hours. Looks like if you have the right tool to do the job, you can do a lot of damage very fast. That tool is belt sender.
    C5BBEB6A-58CA-4B20-A9CD-21E86DD81FC6.jpeg FD7C3F45-B041-472E-8702-0909E889D881.jpeg 298EC2D6-DB70-4D71-8487-8C44C24442E1.jpeg 5FF29BF6-9934-4B63-BB31-FDAC6C069A9E.jpeg 019CFB8A-4542-402C-8EF4-DCFFF3F79160.jpeg B7990B50-E7F0-45FA-A51B-1C721FFD606E.jpeg D92C3700-5A41-42E3-B6CF-56E55C59440E.jpeg
     
  14. Oct 19, 2019 #1414

    Eugene

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  15. Oct 27, 2019 #1415

    Eugene

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    Last week I was flying Champ again with our local instructor. This time I was paying extra attention to this airplane. And yes, at 80-85 MPH this 4412 wing is definitely level to horizon in level flight and 2 people (1200 lb).

    Something I don't ever see on my Skyboy solo and more power with only 1000 lb. We talked about this many times before. Drag is my enemy. I know.

    My question is different this time. I talked many times about same 4412 wing and 60" chord on Aeronca and Skyboy. But on Champ ribs spacing about 12-14", and on my Skyboy about 20-22".

    Wondering if this has any aerodynamic effect at all, at speeds below 100 MPH? Thank you!
     
  16. Nov 4, 2019 #1416

    Eugene

    Eugene

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    Didn’t really have time to do anything, but keep thinking about correct way to make connection for my new piece with wheel pans.

    A3BBB55D-FCC2-4A3B-9297-238F2B900776.jpeg DB4D85BF-0908-4803-BD9C-5B92BE2A4F5F.jpeg
     
  17. Nov 4, 2019 #1417

    Tornado Flyer

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    Since the wheel pants move with the wheel, I think this is not easy.
     
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