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  1. lisamaverick

    why aircraft weight has so big difference between landing and takeoff?

    hi swearingen, Thanks. Now I am clear about this.
  2. lisamaverick

    why aircraft weight has so big difference between landing and takeoff?

    Hello everyone: During searching for some information, I found out that the maximum takeoff weight and maximum landing weight are so different for an aircraft? take an example for A380: Maximum takeoff weight 560 tonnes Maximum landing weight 386 tonnes So if A380 takeoff with 560 tonnes...
  3. lisamaverick

    Help- How the values for tails will become after wing interaction

    Hi Guys: I am dealing with the normal commercial aircrafts. Especially A380, A320, B747 and B737. KENAT, thanks for your information. I will go though them now. :) Lisa
  4. lisamaverick

    Help- How the values for tails will become after wing interaction

    israelkk, KENAT: Thanks for your posts.:) I am wondering if there are empirical factors for the changes. Such as the angle of attack will be half, and the free stream velocity will probably keep constant. Lisa
  5. lisamaverick

    Help- How the values for tails will become after wing interaction

    Hello guys: After the air flowing past the wing of an aircraft, the flow will hit the horizontal tail and vertical tail. I am wandering how the angle of attack and free stream velocity will change? How much of the values I should use for the tails? Thanks a lot. :) Lisa
  6. lisamaverick

    Help- How the values for tails will become after wing interaction

    Hello guys: After the air flowing past the wing of an aircraft, the flow will hit the horizontal tail and vertical tail. I am wandering how the angle of attack and free stream velocity will change? How much of the values I should use for the tails? Thanks a lot. :) Lisa
  7. lisamaverick

    maximum angle of aileron and rudder?

    Hi Guys; I have not come here for a long time. Thank you all for the detailed information. :) That is really helpful for me. Lisa
  8. lisamaverick

    Why Mathcad takes a long time to save??

    Hi TTFN: Thanks for your quick response. I am using Mathcad 13.1 I indeed have many images in the worksheet. They are all "x-y plot" images. Please tell me what I should do to reduce the saving time? :)
  9. lisamaverick

    Why Mathcad takes a long time to save??

    Hello everyone: When my Mathcad file getting bigger and bigger, the time to save the file getting larger too. The same as the time to calculate the whole worksheet! I am wonderring if there is some "preferences" change or anything else help me save it faster during editting?? Thanks a lot. :)
  10. lisamaverick

    why I can not use "Surface plot"

    Hi guys: Thank you all very much! I am running Mathcad 13.0 in Microsoft Windows XP Professional Version 2002 Service Pack 2.
  11. lisamaverick

    why I can not use "Surface plot"

    Dear all: If I click the "surface plot", the CPU will run to 100%, and then Mathcad is closed suddenly. I tried it in an empty sheet, it happened again! I do not want to reinstall it, because I need to tell the Administrator what happened and then....and then.....It will take a long time...
  12. lisamaverick

    maximum angle of aileron and rudder?

    Dear everyone: If anybody here by chance know that what the maximum angles for aileron and rudder for a practical aircraft? I do not think that is -90deg and +90deg, is it right? Thanks a lot. lisa
  13. lisamaverick

    Which software I should use to draw wing geometry graphs?

    Hi, faroiloance Thanks for your suggestion
  14. lisamaverick

    Which software I should use to draw wing geometry graphs?

    Hi guys: I think all of you have seen the books: Fundamentals of Aerodynamcis(Anderson) and Low Speed Aerodynamcis(Kats). If anybody here know that how to draw a graph like the graphs (x,y,z coordinates, angles, wing geometry...) in these books? Which software I should use? Many thanks!
  15. lisamaverick

    Differences between Lifting-Surface Method and Panel Mehtod

    Hi guys, I have one simple question. What is the difference between Lifting-Surface and Panel methods? And if strip method is the same as Panel? Thanks in advance. :)

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