Miscelleneous

Stability – I : Chapter 10

  1. On a ship of 5000 t displacement , a tank is partly full of DO of RD 0.88. If the moment of inertia of the tank about its centreline is 242m4 , find the FSC .
Solution:

W = 5000t, RD = 0.88, I = 242m4

We know that :
FSC = (i di /W )
= (242 x 0.88 ) /5000
= 0.042m.

  1. If the tank in Question 1 was partly full of SW instead of DO, find the FSC.
Solution:

RD = 1.025

We know that:
FSC = (i di/W )
= (242 x1.025) /5000
= 0.049m.

  1. On a ship of W 6000 t, KM 7.4m, KG 6.6m, a double bottom tank of i 1200m4 is partly full of FW . Find the GM fluid .
Solution:

W = 6000 t & KM = 7.4m,
KG = 6.6m, i = 1200m4, RD = 1.00

GM (solid) = (KM – KG)
= (7.4 – 6.6)
= 0.8m

We know that:

FSC = (i di /W )
= (1200 x 1) /6000
= 0.2m

Fluid GM = GM (solid) – FSC
= (0.8 – 0.2)
= 0.6m

  1. Given the following particulars, Find the GM fluid : W= 8800 t, tank of i = 1166 m4 is partly full of HFO of RD 0.95, KM 10.1m, KG 9.4m .
Solution:

W = 8800 t & i = 1166m4,
RD = 0.95,
KM = 10.1 m & KG = 9.0m.

GM (solid) = (KM – KG)
= (10.1 – 9.0)
= 1.1m

We know that:

FSC = (i di /W )
= (1166 x 0.95)/ 8800
= 0.126m

GM fluid = GM (solid) – FSC
= (1.1 – 0.126)
= 0.974m.

  1. On a vessel of W 16000 t, NO.4 port DB tank 20m long and 8m wide is partly full of DW ballast of RD 1.010. Find the FSC.
Solution:

W = 16000t,
L = 20m & B = 8m,RD = 1.010

We know that:

FSC = (i di / W)
FSC =( LB3 X di )/( 12 x W)
= (20 x 83 x 1.010)/(12 x 16000)
= 0.054m.

About the author

Vikrant_sharma

4 Comments

  • the breath of the load water plan of a ship 90m long measured at equal intervals from forward are as follow 0,3.96,8.53,11.58,12.19,12.5,11.58,5.18,3.44, and 0.3m respectively.if the load draft is 5m and the block coefficient is 0.6. find the freshwater allowance and position of the centre of floatation

Leave a Comment

How to whitelist website on AdBlocker?

How to whitelist website on AdBlocker?

  1. 1 Click on the AdBlock Plus icon on the top right corner of your browser
  2. 2 Click on "Enabled on this site" from the AdBlock Plus option
  3. 3 Refresh the page and start browsing the site
error: Content is protected !!