Q7. Improvements in Rudder efficiency can considerably contribute to improving propulsion effectiveness. Discuss common rudder-efficiency improvements devices/ techniques currently in use, referring to the following:
(a) Rudder Thrust Fins
(b) Asymmetric Rudders
(c) Rudder Bulbs
(d) Grim Vane Wheels
Q5.a) Explain how a force normal to the rudder is produced when the rudder is turned to a helm angle.
b) Define the term centre of effort as applied to a rudder.
c) Describe how the position of centre of effort changes as helm angle increases.
d) Explain the term balanced, describing the benefits of fitting a balanced rudder.
e) Describe, with the aid of a sketch, how an angle of heel is produced due to the force on the rudder.
Username or email address *Required
Password *Required
Note: Entering wrong username in the login form will ban your IP address immediately. Entering wrong password multiple times will also ban your IP address temporarily.
Log in
Lost your password? Remember me
No account yet?
