2-62 



BOAT HULL DESIGN 



Since the panels involved are all relatively long and narrow, the bending moment and 

 section modulus used are in each case taken for a one in. wide strip. This strip is con- 

 sidered to act as a uniformly loaded, fixed ended beam of span equal to the distance 

 between longitudinals. 



The calculations have been arranged in tabular form for convenience, Table 2-9. 



TABLE 2-9. SHELL LAMINATE 



* Due to space limitations only the critical Z is shown. 

 ** Forward of Station 7 use 4 plies of woven roving, as required between 

 Long'ls. #2 and #3, for consistency and ease of construction. 



*** Between Stations 9 and 10 inboard of Long'l. #2, a local increase to 

 4 plies of woven roving is recommended because of the pressure 

 from the propeller. 



Shell Longitudinals: The shell longitudinals are designed as fixed ended beams to with- 

 stand the same design load as the shell they support. The calculations have been arranged 

 in tabular form for convenience. Table 2-10. Hat section stiff eners have been used throughout. 



The stiffener sections indicated have been checked for shear and found satisfactory. For 

 a typical shear stress calculation see Design Example 2-3. 



