lixing

Hi friends! I am trying to modeling a marine propeller in caeses, in the process, i am very confused by the meaning( chord,thickness,camber,skew and rake ) of propeller in caeses； According to my understanding 1 chord is a dimensionless parameter that can be defined as chord length/radius? 2 thickness,camber can be regarded as maxthickness/chordlength and camber/chordlength? 3 But what is the defination of skew and rake, skew/radius or skew/chordlength??? can anybody help me? Best regards