Rate my Flaps...

Discussion in 'Aircraft Design / Aerodynamics / New Technology' started by Foundationer, May 29, 2019.

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  1. May 30, 2019 #21

    BJC

    BJC

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    Bill: You may have missed my elaboration in post 17;

    Agree with all of that. I installed foam / glass ribs to reinforce the upper skin where people are likely to step.

    BJC
     
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  2. May 31, 2019 #22

    pictsidhe

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    The boundary layer is a problem for ailerons, elevatirs and rudders where they need to to work at small deflections. Flaps operate in coarse increments and can be airfoil shape.

    Yes to the red line, sort of. TOWS references some NACA papers on slotted flaps, they'd be well worth reading.
     
  3. Jun 6, 2019 #23

    BJC

    BJC

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    Bill: Here is the report that I remembered.
    https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19790001850.pdf
    Start on page 34. [edit: corrected page number]


    BJC
     
    Last edited: Jun 7, 2019
  4. Jun 7, 2019 #24

    mcrae0104

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    I happened to see an FJ the other day and this thread made me pay more attention to the (lack of) streamlining in the flap cove...

    IMG_7512.JPG
     
    Last edited: Jun 7, 2019
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  5. Jun 7, 2019 #25

    Foundationer

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    That picture's making me think the important bit is getting the nice nozzle shape into the flap is the really important thing.

    Another flap question. Load on a slotted flap? Treat it as its own little airfoil that makes about Cl of 2 or some other method? Methods I've seen have all been for plain flaps.
     
  6. Jun 7, 2019 #26

    BJC

    BJC

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    Yes.

    See page 31 for incremental Cm with slotted flaps. Refer to the aileron data for plain flap characteristics.


    BJC
     
  7. Jun 7, 2019 #27

    Foundationer

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    Page 31 of... ? ToWS?

    EDIT: AH! I GOT YOU! THAT REPORT. THANKS!
     
  8. Jun 7, 2019 #28

    flyrite

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    Not necessarily what you guys are discussing, But does address a few of the points raised.


     
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  9. Jun 7, 2019 #29

    BJC

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    fly:

    Tell us about all the mods on your Woody’s Pusher. Is that the Altamaha in the video?

    There is a thread for discussing modifications.


    BJC
     
  10. Jun 7, 2019 #30

    flyrite

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    So I don’t hyjack this thread I’ve created one in the test and improvement section.
    Thanks BJC for the interest.
     
  11. Jun 7, 2019 #31

    Pops

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    My old flight instructor used to have the prototype Woody Pusher. Wanted to give it to me , but I didn't have room for it and he ended up selling it to someone. Someone said Woody's son has it now. That would be nice.
     
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  12. Jun 7, 2019 #32

    BJC

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    Pops and flyrite like this.

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