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Has anyone else experienced an issue where their control surfaces do the opposite of what they should?

242 SpillySock  3.5 years ago

I'm not just talking about inverting the direction.

My pitch control surfaces are controlling my plane how they should, when I pull back on the stick the nose comes up. However the control surfaces point downward which would usually make the nose pitch down. They should be pointing upward when I pull up.

My yaw is also acting strange, no matter how tall I make the vertical stabilizer when I yaw to the right the control surface points in the right direction (it turns to the right) and the plane yaws to the right but it also rolls me to the right (a right yaw input should roll me left). I can't figure out what is going on with it, I'm not using any mods the plane is completely stock.

Has anyone else experienced these issues?

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    16.5k edensk

    @SpillySock if you use a single wing on each side yes

    +1 3.5 years ago
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    @edensk I used two sets and put them on either side of the fuselage, I just have the pitch control surfaces on them. Does pitch get screwed up on main wings?

    3.5 years ago
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    16.5k edensk

    @SpillySock oh, for delta wings you should use two sets of wings, like a normal configuration, except you put them next to each other. Your rolling problem is most likely due to a way too big vertical stabilizer or small wings

    3.5 years ago
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    @edensk Also that diagram is exactly what I would expect however when I yaw left for example like the diagram shows my plane rolls to the right instead.

    3.5 years ago
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    @edensk no, it's a delta wing design. I just replicated the results by putting a delta wing design on a simpler plane than the one i'm making, I put the pitch control surface on the main wing. Does simple planes no read pitch correctly on main wings? I think I might need to switch the wing to a horizontal stabilizer

    3.5 years ago
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    16.5k edensk

    "My pitch control surfaces are controlling my plane how they should, when I pull back on the stick the nose comes up. However the control surfaces point downward which would usually make the nose pitch down. They should be pointing upward when I pull up"


    canard design?

    3.5 years ago
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    16.5k edensk

    "(a right yaw input should roll me left)"
    This is a real thing, most noticeable on planes with swept wings (SP doesn't care about sweep though). Essentially when yawing the change in angle of slip makes a wing create more lift than the other: diagram

    3.5 years ago