Slide 12 of 24
Notes:
REFERENCES: CRENSHAW, CHAP 3
THE PROPELLER WILL GENERATE BOTH LONGITUDINAL AND TRANSVERSE FORCES.
TWIN SCREW SHIPS CAN OPPOSE THE LONGITUDINAL FORCES TO CREATE A TWISTING MOMENT.
CRENSHAW COMPARES SIDE FORCE (TRANSVERSE FORCE) TO A PADDLE WHEEL AFFECT WITH THE PROPELLER WALKING ACROSS THE BOTTOM. WHEN GOING AHEAD, A RIGHT HAND SCREW WILL FORCE THE STERN TO STARBOARD AND THE BOW TO PORT. A LEFT HAND SCREW DOES THE OPPOSITE.
