STARBOARD 



DIRECTION 

 OF 

 ROTATION 



d' 



VELOCITY COMPONENTS 



IN THE PROPELLER PLANE 

 RELATIVE TO THE MODEL 



THE SHIP SPEED IN KNOTS (17.5) 



THE HORIZONTAL COMPONENT. THE 

 SIGN IS POSITIVE IF FLOW IS DIRECTED 

 TOWARD THE CENTERLINE OF THE SHIP. 



THE VERTICAL COMPONENT. THE 

 SIGN IS POSITIVE IF FLOW IS DIRECTED 

 UPWARDS. 



THE TRANSVERSE COMPONENT. 



THE TANGENTIAL COMPONENT. THE 

 SIGN IS MINUS IF THE COMPONENT IS 

 IN THE DIRECTION OF THE ROTATION 

 (RIGHT-HANDED PROPELLER). 



THE RADIAL COMPONENT. THE SIGN IS 

 POSITIVE IF THE COMPONENT IS TO- 

 WARDS THE CENTERLINE OF THE SHAFT. 



ANGLE OF BLADE POSITION. 



SHAFT RADIUS 



Figure 71 — Velocity-Component Vectors in Propeller Plane 



XI.16 



