fallsfromtrees wrote:It's all very well to use existing ship classes for the design of Charis destroyers, but so far as I have been able to find, none of the references give a range, and the 3500nm range for the hypothetical 1000 tonner had no justification for it. Do we have ranges for the Smith class or the Cassin class destroyers? I did note that the Cassin destroyers built the Bath Iron Works used triple expansion steam engines, and that they could take one screw out of service to improve cruising range, but no ranges were given in the articles I perused.
I said I'd used the Cassin as the inspiration for the design. The design was intentionally stripped down to the bare basics to try and get as much range out of the hull as possible. I chose the Cassin because she had triple expansion steam engines and displaced 1,000t normal displacement. I needed dimensions to estimate the range, and so I picked the closest vessel I could to the minimal specifications given upthread.
As far as the range I chose in the design having no basis, it has a basis in that given the specifications of the vessel, if you minimize everything else and maximize bunkers and engines, then yes, you can theoretically get that range. Is it a perfect system? No. Is it practical? I have no idea. I use a software program to design it, but I have no idea the exact calculations the program uses to determine the final statistics.