How fast could a Deutschland-class ship go after conversion to a carrier with a longer hull, four extra diesels, and a third shaft?
Short answerNo responsible speed estimate is possible without a full redesign study because the proposed conversion changes the hull, structure, shafting, machinery, and power-to-weight ratio.
NotesThe proposal removes turrets, lengthens the hull, adds four diesels, and introduces a third propeller shaft. Each change affects structural stress, machinery arrangement, displacement, and hydrodynamic performance. A cut-and-shut hull may also acquire practical speed limits unrelated to its theoretical power. At that point a confident speed figure would disguise how thoroughly the original ship has been redesigned.