working of a braking system in a ship

Replies

• 

  cooltwins

  hey rahul......
  welcome to CE
  introduce yourself first and then post this question in the respective technical discussions sub forum😀
• 

  rahulsanal

  I am rahul studying in 3rd yr mech engg in amrita school of engineering bangalore
• 

  rahulsanal

  wer do i post the ques?
• 

  rahulsanal

  well i understand that there are these following ways:
  1.reverse thrust (reversing the propeller to forward thrust)
  2.Second, drag (or friction) from the water.
  The problem with these braking system is that they don't stop instantly.
  Is there an alternate method by which i can apply brakes so that the ship stops instantly.
  please help😕
• 

  cooltwins

  Don't introduce yourself here....
  do it in the introduction section in the start point....😀
• 

  sarveshgupta

  yes you can introduce yourself in the introduction section
  
  and post your questions or information you want to share in the respective section
  
  say for example any question related to brakes and all should be posted in the mechanical engineering section
  
  I hope I am clear
• 

  gohm

  Ships due to the inertia of their mass cannot stop instantly (just like trains, though more extreme). Stopping distance is measured as track reack /ship length. Large bulk carriers require a very long distance to come to a complete stop. Part of the reason is a ship cannot go into immediate full reverse thrust from full ahead, the stresses are too great and it causes too much air around the prop which greatly reduces grip of the blades (which increases stopping distance). As a fun example, during the sea trials of the Titanic, it's measured stopping distance was 1/2 mile from 20 knots. This is one of the uses for tugs in a harbor setting to both increase maneuverability and stopping distance of large vessels in a confined space.
  
  Pod systems now being fitting on vessels can greatly improve turning radius and stopping distance. Currently with modern vessel design you would not want one to stop instantly (same for cars) as the abrupt sudden change in forces would cause major damage to the vessel and contents.
• 

  Kaustubh Katdare

  Folks, these comments should have been made on the profile pages.
  
  This is an interesting question. I doubt there's a way to stop the ship instantly.
• 

  gohm

  Good advice Biggie! This question thread was also posted over in the mechanical subforum. Since that is the correct area and this is a duplicate, please post there.