Recent content by andreajf89

  1. A

    Plotting Fanno Flow Entropy Equation in T-s Plot

    Hi everybody, I have a problem with this equation: it represents the motion of a gas in a duct with friction (Fanno flow). I need to plot this function in a T-s plot, do you have any ideas? the Mach number changes along the curve... R=constant S2-S1=R*(M2-1)*log(T2/T1)$
  2. A

    Undergrad Orbit to the Moon: nodes position

    So what burns should I apply in order to be stationary at the L1? And what are the conditions in order to get a free return trajectory?
  3. A

    Undergrad Orbit to the Moon: nodes position

    Dear Tony, thanks for your answer. I began to develope a Matlab code in order to compute all the orbital elements of the mission. Answering your first question, we're required to start from a circular equatorial orbit (H=300 km for example). Right now this is the orbit, following the patched...
  4. A

    Undergrad Orbit to the Moon: nodes position

    Ok but is there a way to get all at once all the year node line position?
  5. A

    Undergrad Orbit to the Moon: nodes position

    Hi everybody, I'm planning a 2016 mission to the moon similar to Apollo 8 (Orbital mechanics homework). I decided to start from a equatorial parking orbit, and then to perform a plane change. The problem is that I obviously need to know the position of the moon's orbit plane, which, as you know...
  6. A

    How can I reduce the order of these troublesome ODE systems?

    I do not need the solution, only a hint if possible...
  7. A

    How can I reduce the order of these troublesome ODE systems?

    Hi everybody, I've troubles with the following two systems of differential equations: image hosting gif I tried to reduce the order but I wasn't able to do anything...