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How do i reduce nose drop?

10.6k Trijetz  5.8 years ago

I am making a plane for the fixed gear fighter challenge, and I added a cockpit to the plane, but when I try to fly it, there is too much nose drop, and I cant even lift the nose up slightly! Can you please help?

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    10.6k Trijetz

    @jamesPLANESii I tried your idea. It does reduce the wing loading quite a bit. I will try it a bit more, but so far it doesn't really help that much, but I do see a bit of a difference.

    +1 5.8 years ago
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    10.6k Trijetz

    @QingyuZhou the problem is that it IS angled.

    5.8 years ago
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    Rotate the stablizer a bit, like 5 degrees would work.

    +1 5.8 years ago
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    K @F104Deathtrap

    5.8 years ago
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    @jamesPLANESii I meant no offense. I was honestly surprised you didn't mention it. Your Beaver is the first float plane I've seen on here that worked.

    Anyway, good luck to you and @Trijets Modifying the horizontal stabs should drastically fix any problems here, whatever the cause.

    +1 5.8 years ago
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    Ok. That is rather high. Reducing the wing load could help make it fly better. It may not be causing the nose drop, but it will help it. Try doubling up the primary wings. @Trijets

    5.8 years ago
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    Most of the aircraft I build have fixed landing gear, so don’t you think I’d know a fact or two about fixed landing gear aircraft? I can easily tell that those wheels aren’t anywhere near large enough to pull the nose down to the extent that it can’t even pull up. Maybe I already “know better”. @F104Deathtrap

    5.8 years ago
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    14.9k Rodrigo110

    Apply a tiny bit of rotation with rotation on 1% with the fine tuning tool on the horizontal stabiliser until there’s no nose drop.

    +1 5.8 years ago
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    10.6k Trijetz

    @F104Deathtrap yes, i will try that out

    5.8 years ago
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    @Trijets 32 is fine. The Spitfire had 26, but you've got 2 engines. Did you read my explanation?

    5.8 years ago
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    10.6k Trijetz

    @jamesPLANESii 32lbs/2ft

    5.8 years ago
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    This is just my opinion, without having flown the plane and assuming your wings arent too small or the nose too heavy, but your landing gear is probably pulling the nose down.

    The fixed landing gear has drag, and as the plane is pulled forward by the engine, the landing gear is pulled backward by drag, causing the plane to "trip over its feet" so to speak. This happens a lot with float planes and @jamesPLANESii should know better.

    There are two ways to improve the situation. Either XML edit each part of the landing gear to have no drag, or enlarge the horizontal stabilizer and angle it leading-edge-downwards by around 1 or 2 degrees. Setting the air foil on the main wings (not the tail) to "flat bottom" may also help.

    5.8 years ago
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    W8 what is the wing load

    5.8 years ago
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    I see. Yeah this is probably because of a CoM bug. @BogdanX may be able to help you there. Trust me, none of this is your fault.

    5.8 years ago
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    7,051 Rawhide

    @Trijets Clicky clicky

    5.8 years ago
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    10.6k Trijetz

    @jamesPLANESii https://imgur.com/a/8B2S7xJ

    5.8 years ago
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    10.6k Trijetz

    @Botfinder ?

    5.8 years ago
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    Upload a pic to imgur and send a link in the comments @Trijets

    5.8 years ago
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    10.6k Trijetz

    @jamesPLANESii how to send pictures

    5.8 years ago
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    Wait can you show me a picture of it plz @Trijets

    5.8 years ago
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    10.6k Trijetz

    @jamesPLANESii it rolled to the symmetric side, so that isn't the problem. I did hear someone say something about dragging the plane out. Perhaps you know anything about this?

    5.8 years ago
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    10.6k Trijetz

    @jamesPLANESii okay, I will try that.

    5.8 years ago
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    It might be that your primary wings are upside down. To test this, make one wing flat bottom, and the other wing symmetric. If the plane rolls towards the flat bottom wing, then the wings are upside down. If the plane rolls towards the symmetric wing, that is not the issue.

    +1 5.8 years ago
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    10.6k Trijetz

    @RailfanEthan the CoM and CoL are literally touching, the CoL slightly behind the CoM like it was supposed to be

    5.8 years ago
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    Move the wings to near the CoM

    5.8 years ago
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