Hello Everyone,
I'm currently working on the soyuz spacecraft for a reentry simulation and have a few questions about the way airfoils work. I've already read this Forum Post: https://www.orbiter-forum.com/showthread.php?t=38047 about how to programm lift generating capsule and the use of airfoils.
I still have a few questions about the basic functionality of airfoils though.
I use the CreatAirfoil2 function to create the needed airfoils when the Soyuz is created (in the clbkSetClassCaps function). There I use a callback function which gives me the airodynamic coefficients.
These are obviously dependant on the flight parameters, such as Angle of Attack and Mach number. However, as far as I understand, the airfoils are not part of the Orbiter update loop. Thus the question: Do the airfoils update themselfes and their Airodynamic properties? From my understanding they have to, to calculate changes of Lift/Drag due to changing Aerodynamic Coefficients.
Furthermore I wanted to ask, if it is possible to change/update the Center of Pressure as the simulation goes as it is part of the creation of the airfoils. For the Soyuz the Trim angle of attack changes over the course of the reentry and as far as I understand, I would have to model that by moving the Center of Pressure along the axis of symmtery during simulation.
If that is possible, then I'd like to know, if it is also possible to update the orientation of the airfoils mid flight. This way, I could use only one airfoil that turns with capsules bank angle and wouldn't need separated horizontal and vertical airfoils.
Thanks in advance for your time and effort.
DerNerf
I'm currently working on the soyuz spacecraft for a reentry simulation and have a few questions about the way airfoils work. I've already read this Forum Post: https://www.orbiter-forum.com/showthread.php?t=38047 about how to programm lift generating capsule and the use of airfoils.
I still have a few questions about the basic functionality of airfoils though.
I use the CreatAirfoil2 function to create the needed airfoils when the Soyuz is created (in the clbkSetClassCaps function). There I use a callback function which gives me the airodynamic coefficients.
These are obviously dependant on the flight parameters, such as Angle of Attack and Mach number. However, as far as I understand, the airfoils are not part of the Orbiter update loop. Thus the question: Do the airfoils update themselfes and their Airodynamic properties? From my understanding they have to, to calculate changes of Lift/Drag due to changing Aerodynamic Coefficients.
Furthermore I wanted to ask, if it is possible to change/update the Center of Pressure as the simulation goes as it is part of the creation of the airfoils. For the Soyuz the Trim angle of attack changes over the course of the reentry and as far as I understand, I would have to model that by moving the Center of Pressure along the axis of symmtery during simulation.
If that is possible, then I'd like to know, if it is also possible to update the orientation of the airfoils mid flight. This way, I could use only one airfoil that turns with capsules bank angle and wouldn't need separated horizontal and vertical airfoils.
Thanks in advance for your time and effort.
DerNerf