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The front of my plane is dipping

2,151 JaycoCat  5.8 years ago

This is my second forum post today, but I need someone to fix my plane. The nose keeps dipping into the ground when I’m flying and taking off.

Link

(https://www.simpleplanes.com/a/H83D8h/Kailos1Sofar)

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    101k Wallaby

    @pilotred233 Exactly.

    5.8 years ago
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    2,720 pilotred233

    @JaycoCat so the backside lifts up? it's a common phenomenon don't worry about it.
    this only happens to wing designs or candards because the elevator control surface in the rear are inverted.
    therefore the rear will lift up when you pitch upwards.

    5.8 years ago
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    2,151 JaycoCat

    That hasn’t seemed to work. The main problem is the pitch wings make the whole back of the plane move up. It’s probably just me being stupid, and i’ll Try inverting the pitch wings. If that doesn’t work then i’m Not sure what to do
    @ForeverPie

    5.8 years ago
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    2,151 JaycoCat

    Thank you, i’ll Try that now.
    @ForeverPie

    5.8 years ago
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    101k Wallaby

    @JaycoCat You may need a canard. You only have 1 wing for roll and pitch it seems, so adding a horizontal stabilizer in front of the main wing would help stabilize your plane, so long as you then delete your elevators on the main wing.

    5.8 years ago
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    2,151 JaycoCat

    Thank you all so much, I’ve added some stuff but when I pull up, the whole backside of the plane lifts up.
    https://www.simpleplanes.com/a/626BOE/Kailos1Sofar-2-0
    (New plane)
    @ForeverPie
    @pilotred233
    @jamesPLANESii

    5.8 years ago
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    101k Wallaby

    @jamesPLANESii I found a way around the compromise lol

    5.8 years ago
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    2,720 pilotred233

    since I can't play rn I'll just give my theory on why it's dipping,

    here are reasons that MIGHT cause the plane to dip down while flying:
    -The wings may be too massive and cause the wing to fluctuate or as I call "flutter" which only happens on planes with massive wings. To fix this you can use multiple small wings and have a structure inside the massive wing to support the small wings.
    -The center of mass might be placed too far forwards from the center of lift, this has it's own perks and cons. For perks, this makes the plane harder to stall and allow it to fly faster. For cons, this feature can make a plane dip down while flying, making the plane highly unstable unless trimmed and in the worse case scenario have the elevator become so stiff that pitching up is difficult and this really matters a lot, especially in a fighter. The solution to this problem are various, as long as you can get the center of mass close to the center of lift but not to close or fast then the plane will fly smoothly.

    here are reasons I have found about why the plane may dip down while takeoff:
    -The front landing gear is shorter than the rear landing gear. This is a common mistake performed by newbies that makes takeoff difficult. The way to fix this is to mod the size of either front of rear landing gears.
    -The landing gears are t from the extremely low from the center of thrust. This is another problem performed by newbies, often people think their planes are a bit larger so they use large landing gears, which ends up making their plane harder to takeoff with. To solve this, you can use lower landing gears or you can nudge the landing gear inside the fuselage which can allow the landing gear to be any height you want.

    now I'll also talk about a problem that nearly everyone(including me) make sometimes:
    -the rear landing gear is not right behind the center of mass, this makes it hard for the plane to rotate. To fix this you can place the landing gears right behind the center of mass.

    +1 5.8 years ago
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    2,151 JaycoCat

    Thank you, i’ll Try that out

    5.8 years ago
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    BTW you don’t have any wings on it yet.

    +1 5.8 years ago
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    Too heavy for the gear. Use default stronger gear of make them non retractable.
    ”James what the hell are you doing saying use default gear??? Are you OK???”
    Well sometime syou’ve just got a compromise.

    +2 5.8 years ago