Responder a: Momentum Theory (com Angular Motion – w)

[fabio]

Felipe,

Está na pg 239 da seção 10 – “Other Propulsion Devices”

Since from the 10 percent maximum potential saving
in energy from the total elimination of rotational
losses, the contra-propeller action of the ship rudder
alone is already contributing 3 to 4 percent, it will be
clear from the above that part of the 4 to 8 percent
power savings obtained with the reaction fin has to be
attributed to an improvement in the flow on the after
body and in the propeller-hull interaction. (pg 239)