Responder a: 10% de perda de eficiência devido a energia rotacional – momentum

[fabio]

Luiz,

Está na seção 10 : 10.11. Other Devices, pg 240

“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.”