But again, for me, I gotta say that doesn't suit my personal fantasy-world sensibilities. WotBS had a mile-long airship and Star Wars has a Death Star; I feel that behemoth ships quarter of a mile long have their place in a fantasy setting, as do magically powered ships which move much faster than physics would allow.
If armour, weapons, races, creatures, and buildings don't have to obey the laws of physics and follow any kind of historical realism, I don't see why ships should be an exception.
All this is nothing to do with what Ryan's doing, BTW. I don't know what he's doing on the creative side (though I'm sure I'll find out soon enough). Just my own personal preference.
Well from my perspective, throwing physics and reality to the wind generally doesn't require a book to be helpful. A simulationist on the other hand is going to find a book of history and good numbers to be very helpful.
I think catering to all styles is completely awesome, but I think if you're choosing one to cater to, simulation might sell the best.