Search results

Okay, got it, Thank you very much, then I know what I'll go after next. :thumbup:

First of all, thanks for the answer. Just so I get it right: Orbiter does NOT simulate transsonic efects by itself from the mesh. All aerodynamic effects, like transsonic or hypersonic effects, have to implemented via the aero coefficients. And if I want to I can use the Orbiter helper function...

Hello everyone, I'm currently working on the simulation of the re-entry of a lifting capsule. I already have decently working aerodynamics and all that stuff, but I found somehing i can't quite explain: The callback function for aerodynamic coefficients works fine and generally the results in...

Yeah, that makes sense. That could be the case. That would mean we found a part of the problems cause, but still not the solution. Okay, that gave me an Idea. I think I'll try to give the horizontal function a lift and drag coefficient of zero. maybe the fact that there was no "horizontal...

Yes I am. The Soyuz basis is a model by a Manuel Schmitz and my predecessor also posted on this forum under the Name birdman. You have helped him quite a bit too :)

Ok, I think there is a fundamental understanding issue here from my Side. I dont know what the Lift or Drag function are. As far as I got it, to achieve lift and drag in Orbiter, I use airfoils. These have certain dimensions, a reference point where the forces act on the vehicle and the Aero...

Okay, I got that. The Coordinate Systems "turn" with the vehicle as it turns and changes its bank anlge. Is it right then, that the vertical lift is from the AoA and the horizontal from the slip angle? The (real) Soyuz is not only aerodynamicly stable but also stabilized by a control system...

The coefficients are taken from literature and I dont know how I would have to change them to achieve that effect. Furthermore this is for my Bachelor Thesis, so I really don't want to mess with given values. Doesn't leave a good Impression. Isn't there a smoother way for all of this? A Plane's...

Well the lift changes direction with a change of the bank angle, so i would suppose both airfoils do generate lift, as that is, from my understanding, the whole reason to have two airfoils for horizontal and vertical lift. Or do you mean, that the two airfoils create the amount of lift that only...

Hey everyone, I'm currently working on a lifting caspule Soyuz module. I have Literature values that state, that the Soyuz flies with a changing trim angle of attack for different Mach numbers. The Soyuz has a shifted CoG (Cetner of Gravity/Mass) and I set the CoP (Center of Pressure) in a way...

What do you mean by lift function? The Coefficients are calculated this way: /* Mach Number Steps of Reference Points */ const double aero_MAref[6] = { 0.60, 0.95, 1.10, 1.78, 2.52, 5.96 }; /* Angle of Attack (AoA) Steps of Reference Points */ const double aero_AOAref[7] = { 0.0*RAD...

Hello everyone, I'm currently (still) working on a lifting capsule Soyuz model for re-entry simulation. As described in the API Guide I have defined two airfoils, one for horizontal and one for vertical lift with all the given parameters. The Code is as follows: double D1 = 2.2; VECTOR3...

First of all thanks for all the reply's Thanks for the clarification. I suspected it to work that way but couldn't find it in the API_Reference file. I'm still kinda new to the whole C++ thing. One more thing: In the API Guide the Lift and Drag Coefficients are defined as: cl = L/q*S and cd =...

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...