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  1. 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...
  2. 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
  3. 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
  4. 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. :)
  5. 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...
  6. 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
  7. 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!
  8. 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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