These values can be used to enter the area and waterline coefficient contours, and 

 the area curve and lines plan can then be drawn. The stations to which the ordinates refer 

 must be spaced equally along the lengths of entrance and run. 



e. Bow and stern contours 



These are shown in Figure 11. The stern has an aperture suitable for a single screw 

 with cruiser stern. The bow profile is almost vertical below water, the waterline endings 

 being drawn with a radius. The radius corresponds to 2 in. at 1.1 WL and 24 in. at 1.95 WL 

 for a ship having an LBP of 4 00 ft. (1.00 WL is the designed load waterline.) 



f. Although it was realized that the incorporation of a bulb in the bow lines would be of 

 benefit in the finer models of the series, this would have introduced a discontinuity in the 

 graphical representation of the forms. The Panel decided that this was not desirable in a 

 methodical series of this type, and that the effect of bulbs of different shapes and sizes 

 could well be the subject of a future research project of the kind for which Series 60 was 

 designed to be a starting point. 



g. Another future research project which might stem from the Series sv.ould be concerned 

 with the behavior of such models in waves, and the effect of changes in fullness and propor- 

 tions upon their motions and speed loss. It was therefore important that the above-water 

 forms should be realistic in term.s of sheer and flare, and after consultation with the Maritime 

 Administration, they were drawn out to represent modern average practice. 



IV-24 



