Yes indeed, 80% the acceleration is slightly
too much, perhaps not during the first 30 seconds (the first 20 m).
After that, from 3 kts on, it would need
the engines of one of the greatest Ocean liners, and that disregarding
any residual resistance (somewhat like a train, on rails at slow speeds).
Such a cruise ship has a power ratio around 1kW per ton, bringing her to a speed around 40 km/h through the water, not bad at all, but not quite a speedboat.
There still remains
the difficulty that she comes to a halt in 2.5 times her length without having reversed, what tends to indicate a
very bad hull form, or some kind of hydroflaps
.
My point is that the performances of a big ship could be simulated realistically if there was a
semblance of internal coherence between the data of the ship. Why not say that the power of the Ocean Star is (ie must lie) somewhere between 150MW and 200MW? 6 Azipods of 30 MW for instance, to the great pleasure of ABB and of the passengers. Starting from Southampton, you would
reach Ft Lauderdale in 3 1/2 days!
Incoherent dimensional data vs weight cannot be hidden, but the engine power, being invisible (more smoke, perhaps?), can be easily made coherent with the dynamic behavior of the ship.
That is why I prefer the Titanic (
until I have checked its accelerations...)!
Regards,
Luc
Poll
