Can RF-X model full scale airplanes?

[william.walker3]

Does anybody know if it is possible to model full scale airplanes using RF-X? I have made full scale airplane FBX files using 3DS Max 2018 and successfully got them to fly using smaller available RFX physical models, but they fly unusually slow. But when I try to center the graphical model with the physical model or try to resize the physical model, the simulation becomes unstable and unusable.