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My symmetric plane can not pitch up or down without rolling left or right.

531 sippman  6.9 years ago

So I've built a F4 Phantom (which is almost ready for publishing) but the thing cant fly straight. It is symmetric however it cant go up or down without rolling. What is causing this problem?

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    @sippman

    6.9 years ago
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    make sure one of your elevators aren't inverted

    6.9 years ago
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    531 sippman

    @F4f879
    @WNP78

    I replaced the rear gears with wing gears (so they have the same drag) and removed all the cockpit parts. The thing can now fly straight but there is another major malfunction. It still cant pitch up or down without rolling. Oski said "it flies just like the real one", and I want to know the solution to this.

    6.9 years ago
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    Dev WNP78

    The problem seems to be to do with the sides of the cockpit. I went through, deleting details one by one to see if the problem went away, and when I removed them it flew straight.

    6.9 years ago
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    21.8k F4f879
    6.9 years ago
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    531 sippman

    @Oski The cockpits arent scaled but one of my us insignia decal on the left creates 5 drag while the right one creates 0
    @Rodrigo110 I can't un-angle the elevators as it would create something else than a f4 phantom :( Maybe some XML editing might solve it.
    @BeryllCorp Ill link it here. Tell me when you download it so I can delete it.

    6.9 years ago
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    8,632 BeryllCorp

    the best way to diagnose the problem is to post the plane unlisted and share the link

    +1 6.9 years ago
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    15.1k Rodrigo110

    You need to reduce the size of the Elevators. If the elevators are too big then an influx of air flow over the tailplane can cause the plane to roll heavily to the left or right. This also occurs if the elevators are rotated or angled at all. If you fix these then your plane should be alright.

    6.9 years ago
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    10.5k Xenotriver

    Flies like the real one XD
    But really, did you scale the cocpit down? If so, it may create lots of drag on one side, so this happens. Try resizing it back to normal. If it won't help, then Idk

    6.9 years ago