Saturday, April 30, 2011

Estimating ship's powering 
L.K. Kupras' method 

At the initial stage of a ship's design a propulsion power estimation is to be done to ascertain that the vessel can sail at the specified speed. As the ship design development progresses, models tests are usually performed in a hydrodynamics tank, which serve to optimize the hull form, adjust the propeller(s) design and ensure the speed/power prediction for a proper choice of the propelling engine(s).

Friday, April 8, 2011

¿ How much does a ship weigh ?
Archimedes' principle

This question is deliberately ambiguous and what intends to ask is how can you get the weight of a ship, referring, of course, to a large ship, that can not be placed on a balance. It also refers to the weight of a real floating ship  already built and it is not considering here the weight estimation during the ship's design phase.