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  1. #1
    300+ Forum Addict AchillesP's Avatar
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    Mycockpit.org Flight Dynamics: FSX and X-Plane battle it out

    I found this article. It explains the differences between fsx and x-plane flight dynamics.

    http://www.simpilotnet.com/index.php...ask=view&id=20
    With best regards,
    Achilles
    http://www.thefsps.com

  2. Thanks Tomlin, BlackWidow, Trevor Hale thanked for this post
  3. #2
    2000+ Poster - Never Leaves the Sim Trevor Hale's Avatar
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    Very interesting and informative reading

    Cheers
    ________________________
    Trevor Hale

  4. #3
    75+ Posting Member



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    Hi,

    Also worth reading is Austin's reply to some of the issues raised in the article.

    http://games.groups.yahoo.com/group/...s/message/1412

    Ian

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  6. #4
    150+ Forum Groupie
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    I have to say that I find X-Plane most unrealistic. Technically it should be way superior but every simulator I've been on that is based on X-Plane I've felt my education is more focused on X-Plane UI than on flying. And I'm a real pilot so would know.
    VANCOUVER
    Jet fighter / single pilot sim, plus thinking of a 777 as a secondary sim.

  7. #5
    300+ Forum Addict BlackWidow's Avatar
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    WOW that is some good reading

    Now Im even more confused LOL.
    Mike G.

  8. #6
    500+ This must be a daytime job mauriceb's Avatar
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    My X-plane 'experience' dates back several years, so may not be relevant anymore. But at that time, I thought X-plane was great. However, I never tried the one test which I think would separate the men from the boys and which both FSX & X-plane fail miserably according to this article.

    And I'm referring to the cross-control situation which you can use to lose altitude fast without gaining speed (or for crosswind landings). The FSX 172 (& I'm sure other models) fails very badly and is totally unrealistic. If you lower a wing, you will start turning no matter how much opposite rudder you use. From my past experience, I thought X-plane would be better but this gentleman claims X-plane is not any better.

    If that is true, then I would say all the hype about X-plane flight model is just hype. Has anyone tried this with X-plane?

    Maurice

  9. #7
    1000+ Poster - Fantastic Contributor Tomlin's Avatar
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    This article pointed out something that I have always wondered. If X Plane's aircraft fly according to the way they are built, using geometry and BET, then why does the default C172 fly so horrible? I'll give them that the article (or response to the aforementioned article) admits that the 172 is not their 'strongest' aircraft (Im not able to find that quote now, sorry). However, if the aircraft fly according to how they are built in the sim's environment then evidently the default XP C172 was not made very well. It's a long debated topic, but certainly worth revisiting from time to time since the lastest version does look very nice compared to a few versions back. My experience with ver. 8 is where I got my personal reference from.

    Thanks for the post.
    Eric Tomlin-
    Learjet 45 Builder
    www.flightlevel180.org

  10. #8
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    Re:Flight Dynamics

    Worlds costliest flight was Airbus its more attractive when compared to other flights flight dynamic it will be good.
    --------------------
    Ganeshan


    Sreevysh Corp

  11. #9
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    Quote Originally Posted by Tomlin View Post
    ...if the aircraft fly according to how they are built in the sim's environment then evidently the default XP C172 was not made very well.
    I think this is the golden point. If your basic model for creating an aircraft is based on real flight dynamics, either you spend months creating a technically accurate model with the risk that a small error will mess up the whole experience, or you approximate it.

    Now here's the other thing. A vast majority of after-market X-Plane aircraft are from enthusiasts, and appear to be for free. While this is no bad thing, how many contributors will invest this time painstakingly tweaking their dynamics?!

    Having a model that accurately reflects flight characteristics has the potential to be the best and most useful flight simulator on the market. The question, in my mind, is of the fidelity of the in-built and public domain aircraft.

    With the Microsoft model, not needing a Ph,D in aerodynamics coupled with an apprenticeship in advanced fluid mechanics, means that it's quick and easy to build aircraft that will either closely resemble the original for 90% of performance and handling, or will be easy for someone else to come along and tweak.

    In theory X-Plane has the potential to be the best flight sim, but in a practical sense Microsoft has the upper hand
    Last edited by Paul G; 09-24-2008 at 02:39 PM. Reason: correct spelling
    VANCOUVER
    Jet fighter / single pilot sim, plus thinking of a 777 as a secondary sim.

  12. #10
    1000+ Poster - Fantastic Contributor AndyT's Avatar
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    Another point,

    Austin says that 10 or 100,000 polys makes no difference in the handling and he should know because he tested it he says.

    That's true as far as it goes. What he doesn't say is that the engine is not designed for that level of resolution when computing the dynamics during flight. If it were, then more polys would equal more accurate flight characteristics.

    Another thing that is not taken into account is the wear and tear on the plane and especially the engine. As a plane gets older, it loses power. Put a new engine in and get your performance back. Are we to model aging engines now as well?

    If only I had a copy of FS20. I have no idea what kind of machine it will require but I bet all this will be quite moot by then. Hmm... Thats in about 25 years from now... I might live to see that.
    God's in command, I'm just the Pilot.
    http://www.geocities.com/andytulenko/

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