Hi, In order to understand your definition of pitch, skew and rake I have a couple of questions. In the documentation there is a profile and a picture showing the definitions, although its slightly confusing since the (by the look of it) the pitch definition is defined as the blade profile is rotating around max thickness when picth is altered. If that is the case then rake would be influenced and this is not the case when you model the blade by the curves in CAESES. Can you point out what the tho points in that picture represents, one should be the generator line and the other max thickness, but which is which? BR Daniel