You see, now my parallel middle body has increased, good from production point of view, I
have reduced, I have made the bilge radius large thinking that the bilge flow will be
smoother, but in the process I have made my shoulders very prominent, and if I have large
shoulders I know I will get into trouble. So, you see, what I wrote in the first page, I talked
about CB first and you see how CP and CM are playing roles; CP, what is prismatic
coefficient? In these two cases, you can see that CP for this case, the dotted line case, is
higher because Cmidship is lower, so, this dotted line that is, lower CM or Cmidship, lower
midship area coefficient coming out of larger bilge radius will give me lower CP, sorry,
higher CP, and this is having lower CP. So, whatever may be the CB, for the same CB you
will have a range of CP based on your bilge radius; and you can see that lower CP is better
than higher CP from shoulder point of view of course, you can then say that I will go to the
extreme and make the Cmidship as one, then my CP is same as CB, I got a, is that desirable?
I cannot go lower than that, is that desirable to have a CP like that? That is not desirable
because you are introducing large separated flow, because the bilge will be now totally
discontinuous you will introduce large separated flow. So, there is a compromise between the
CP you can give and in the range of CP that you can give, you have to make a compromise in
the range of CP that you will give. And normally from merchant ships, your bilge radius is
limited to between about 1.5 to 3 meters- you do not go beyond that.