Flea style "Piojo Flying MiniBike"

Discussion in 'Aircraft Design / Aerodynamics / New Technology' started by FritzW, Oct 26, 2015.

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  1. Aug 26, 2019 #401

    poormansairforce

    poormansairforce

    poormansairforce

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    Thats going to get someone killed! Or am I missing something?
     
  2. Aug 26, 2019 #402

    FritzW

    FritzW

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    Except the ailerons are backasswards and it has virtually no pitch control.
     
  3. Aug 26, 2019 #403

    Sockmonkey

    Sockmonkey

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    They're actually not. Having the places where they attach to the wing spaced wider than where they attach to the stick makes them push in the direction the stick is moved. Though, yes they should be connected higher on the stick.
     
  4. Aug 26, 2019 #404

    FritzW

    FritzW

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    Huh??? The way you've drawn it: if you push the stick to the right it pulls down on the right wing and the airplane rolls to the left. ...it doesn't matter how far out they're attached.
     
  5. Aug 26, 2019 #405

    Speedboat100

    Speedboat100

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    That Horten mixer looked pretty slick.
     
  6. Aug 26, 2019 #406

    Sockmonkey

    Sockmonkey

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    Like I said, I accidentally had them connected to the stick too low.
    Having the connections near the top of it would make the rod push on the right wing when the stick is moved right.
    Here we go. Now it's corrected.
    [​IMG]
     
  7. Aug 26, 2019 #407

    erkki67

    erkki67

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    Sockmonkey; you shall cross the pushrods on the stick, then the wing halves move into the right direction.

    I believe that the Hortenmixer remains the better choice.
     
  8. Aug 26, 2019 #408

    TFF

    TFF

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    Back to the flippers. Full span ailerons might not be needed, just partial span. Roll with some pitch keeping the nose up in the turn would make the perfect turn. The question is are we trying to take the flea out of the flea?
     
  9. Aug 26, 2019 #409

    Aerowerx

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    What type of joints are those where the pushrod attaches to the stick?

    Seems to me that what ever type of joint, as you move the stick to the right the pushrod will pull down on the wing trailing edge, which is the wrong way.

    Or is the pushrod attached to the wing ahead of the pivot axis? In which case you should have shown that clearly with a 2 view drawing!
     
  10. Aug 26, 2019 #410

    Sockmonkey

    Sockmonkey

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    Ok, here we go. Got the positioning right this time.
    [​IMG]
    Ball joints would have the fewest moving bits I think.
     
  11. Aug 26, 2019 #411

    Battler Britton

    Battler Britton

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    why not just do what is already flying? just have to mouv up and down the all thing


    And the profile is the same than all last Poux...( in french...1 pou.....2 poux!)
    NACA 23112 good for differential wings.

    apev_cubchel1.jpg
     
    Last edited: Aug 26, 2019
  12. Aug 26, 2019 #412

    erkki67

    erkki67

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    And what about the following solution, the whole front wing as it is on the Flea, but using the whole rear wing as an aileron!

    Advantage: no complicated mixer required and still a 3-axis controlled Flea .
     
  13. Aug 26, 2019 #413

    Victor Bravo

    Victor Bravo

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    Why not add Titanium chines, Borane slurry fuel, a ramjet mode for the two engines, and movable inlet cones?

    Ailerons on the rear wing will be worthwhile IMHO, all else is way out of what this was intended to do.
     
  14. Aug 26, 2019 #414

    Aerowerx

    Aerowerx

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    Ok, but in order to bank to the right, the right wing trailing edge MUST move upwards and the left MUST move downwards. This causes more lift on the left and less on the right wing half. This is the same as using typical ailerons, and REQUIRES A CROSS OVER of some kind of the pushrods.

    The way you have it drawn, if you move the stick to the right, the right wing trailing edge will move DOWN, not up!

    What you have drawn will cause great discomfort for any pilot trained in the last 100 years!
     
  15. Aug 26, 2019 #415

    Sockmonkey

    Sockmonkey

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    Because the fore wing mixer isn't complicated? It's two rods coming off the stick with ball joints on the ends.
    No, now that I have the rods positioned right, pushing the stick to the right will deflect the trailing edge of the right wing upwards.
     
  16. Aug 26, 2019 #416

    poormansairforce

    poormansairforce

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    Go back and look at it again, he fixed it. Pay attention to the pivot point of the stick. Doesn't mean the angles are correct yet for the movement needed but its a start....

    However, I question the forces involved?
     
  17. Aug 26, 2019 #417

    Aerowerx

    Aerowerx

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    I guess the round knobby things are the pivot points? And the thing at the top of the stick is the grip?

    And I don't see where it is any different than it was 8 hours ago when I first looked at it.

    Note that in the post by Battler Briton the push rods are attached AHEAD of the wing pivot, which gives the correct action.
     
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  18. Aug 26, 2019 #418

    erkki67

    erkki67

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    Aerowerx is right, for the corresponding wing which goes down the ailerons must go up to push the wing down, so we pull the whole wing half down.

    So the pushrods needs to be crossed at the stick.
     
  19. Aug 27, 2019 #419

    Aerowerx

    Aerowerx

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    Or attached ahead of the wing pivot point.
     
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  20. Aug 27, 2019 #420

    erkki67

    erkki67

    erkki67

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    Correct.
     

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