Rudder Area Calculation

Discussion in 'Boat Design' started by Chayan_Chakraborty, Mar 4, 2020.

  1. Chayan_Chakraborty
    Joined: Aug 2018
    Posts: 5
    Likes: 1, Points: 3
    Location: Dhaka

    Chayan_Chakraborty Junior Member

    Hello people, I am facing a very peculiar problem finding the required rudder area for a 1500 T oil tanker project. The stern shape is too tight to accommodate a rudder with the area (required) found from the popular A=1.75*Lbp*T/100; So I started digging; to my surprise, there were many other formula to calculate rudder area. Can anyone give me an idea of how to take the proper approach for calculating required rudder area??
  2. jehardiman
    Joined: Aug 2004
    Posts: 3,814
    Likes: 1,200, Points: 113, Legacy Rep: 2040
    Location: Port Orchard, Washington, USA

    jehardiman Senior Member

    If the stern is so radical that you are this worried, bite the bullet and do the stability derivatives. Cheaper than a re-build.
  3. Ad Hoc
    Joined: Oct 2008
    Posts: 7,828
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    Location: Japan

    Ad Hoc Naval Architect

    Using the value of 2% of the area of the underwater profile area is a common rule of thumb to use, in the absence of any other data.
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