Originally posted by Brockpaine
How realistic would it be to get a ship that size that makes 18-21 knots, then re-engine it during the CV conversion to make 33 knots? I'm guessing it would be tricky at best... I'd think you'd need to at least replace the shafts.
Not very realistic. The hull form would be more optimised for 20knts, not 30knts+ so you'd have to add even more power than usual, probably getting on for 6-8 times as much power. Where do you fit that sort of power?
The Italian liner Roma was good for 20knts+ and reengined with two sets of lightweight destroyer machinery originally intended for the Capitani Romanis; she was expected to make about 30knts with 150,000shp. She was almost totally gutted and the hull form reworked in the reconstruction. I'm not sure whether it would be worth it.