[gurps]_[VEHICLE]_of_the_week_632_-_Archvillain's_Yacht_(1920s_Version)

[Rupert Boleyn]

Thomas Thrien wrote:

> The formula 1.35 * sqrt( LWL ) is a given fact for ships with a
> conventional hull form (whatever "conventional" means in this context).

That doesn't explain treaty period and WWII destroyers capable of 36 or 
even 40+ knots. Those ships have 'displacement' speeds of 27-30 knots.

Using enough power solves a lot of these problems - the French Fantasque 
class destroyers made 40-43 knots in trials (which in the Frnech Navy 
were performed in a stripped condition), on 86,500-93,800 shp with a 
~420 foot hull (and probably displacing little over 2,000 tons for 
trials) . In contrast HMS Rodney did 23.8 knots on 46,000 shp with a 
~700 foot hull (~34,000 tons). It's amazing what sufficient brute force 
will do.

-- 
Rupert Boleyn <rboleyn at ihug.co.nz>