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Thread: Just fishing

  1. #1
    cgoldy's Avatar
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    Just fishing

    Just up front, to stem the tide of criticism, I am not contemplating this mod. But just wondering.

    Has anyone ever fitted fabric between the front and rear wing strut? Similar to landing gear. What would be the result?
    Javron O-375 wide body extended wing cub
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  2. #2
    skywagon8a's Avatar
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    Like this? Giuseppe Bellanca was a smart aerodynamicist. Perhaps a few ribs to give it an airfoil shape rather than just a flat slab.



    edit: If this is done on a Cub since the struts are separated at the wing instead of at the lower end as is the Bellanca, there will likely be some interference drag at the lower surface of the wing to strut juncture. It might be best to not run the fabric all the way to the wing.
    Last edited by skywagon8a; 10-17-2020 at 06:23 AM.
    N1PA

  3. #3

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    But then you’d have to add a towel rack for when camping.
    Remember, These are the Good old Days!

  4. #4
    skywagon8a's Avatar
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    Try it between the fuselage and the horizontal jury strut. Hmmm? another project?
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  5. #5
    aeroaddict's Avatar
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    Cool idea but I would think you might get aerodynamic interference from the covered struts at high AOA and or flaps deployed.

  6. #6
    skywagon8a's Avatar
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    Before I do it I would measure the angle difference between the two struts and the bottom of the wing. I think I would want a more positive angle of attack on the struts than the wing.
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  7. #7
    wireweinie's Avatar
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    Would this hide the tail at low speeds/high angles? What was the final outcome of the biplane Cubs?

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    Life's tough . . . wear a cup.

  8. #8
    skywagon8a's Avatar
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    Quote Originally Posted by wireweinie View Post
    Would this hide the tail at low speeds/high angles? What was the final outcome of the biplane Cubs?

    Web
    Good question. What happens when the flaps are lowered on a stock Cub? Do they disturb the air over the horizontal tail? Are they the cause of the different trim requirements? Does their flow disturbance cause the tail shake? Why is there pitch up followed by pitch down with the different flap positions? I do not know definitively the answer. But I suspect the airflow from the flaps flows over the horizontal effecting their operation. Thus, if the fabric covered struts are lower than the flaps, their air flow would be below the horizontals. ????

    A long piece of yarn tied to the rear strut and a video camera ought to give us some clues.
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  9. #9

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    Years ago Joe Soloy was trying to figure out how to get more fuel in his turbine 206’s. He was contemplating large aerodynamic wing struts that would be hollow, hold fuel and gravity feed directly to the fuel selector. Obviously he never did this, wonder why. Seemed like a good idea at the time.

  10. #10
    RVBottomly's Avatar
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    I had thought the only reason people didn't do this was for visibility. It would reduce drag even if not providing much lift.

  11. #11

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    I’d be more concerned about adverse effects on the ailerons. If you fabric covered the struts the only effective airfoil would be outboard in front of the ailerons due to the chord created by the fabric there. This airfoil would stall at its critical AOA like all airfoils, and the resulting turbulent flow could have adverse effects on roll control. Some engineering calculations and a test pilot could confirm or deny. Likely not worth the time or effort but fun to speculate about nonetheless.

  12. #12
    Charlie Longley's Avatar
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    Quote Originally Posted by wireweinie View Post
    Would this hide the tail at low speeds/high angles? What was the final outcome of the biplane Cubs?

    Web
    They’re pretty much not around anymore. Gone the way of the Whittaker tandem wheel gear.

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