1. Worked example 1: Deadweight carrier
Department of Naval Architecture & Marine Engineering
Bangladesh University of Engineering & Technology, Dhaka-1000
Worked example 1: Deadweight carrier
Using the data in Figures (optimum block coefficient and general range of principal dimensions) and in Table (typical mass group percentage) provided in the following slides, estimate the principal dimensions of a general cargo ship of 14,500 tonnes deadweight and 14 knots service speed.

2. Figure A: Optimum block coefficient
Department of Naval Architecture & Marine Engineering
Bangladesh University of Engineering & Technology, Dhaka-1000
Figure A: Optimum block coefficient

3. Figure C: General Ranges of principal dimensions
Department of Naval Architecture & Marine Engineering
Bangladesh University of Engineering & Technology, Dhaka-1000
Figure C: General Ranges of principal dimensions

4. Table A: Typical mass group percentage
Department of Naval Architecture & Marine Engineering
Bangladesh University of Engineering & Technology, Dhaka-1000
Table A: Typical mass group percentage

5. Solution Department of Naval Architecture & Marine Engineering
Bangladesh University of Engineering & Technology, Dhaka-1000
Solution

6. Department of Naval Architecture & Marine Engineering
Bangladesh University of Engineering & Technology, Dhaka-1000
Solution (contd.)

7. Department of Naval Architecture & Marine Engineering
Bangladesh University of Engineering & Technology, Dhaka-1000
Comments on solution
If you are not so fortunate with your first choice then select two further values of CB and corresponding Fn from the figures; then find the dimensions and displacement of your two additional trial ships as above. Then plot displacement against Length and pick off the Length which gives the desired displacement.
and so the correct CB can be read from Figure A and a check made on displacement.
Alternatively, displacement may be plotted against CB, in a similar way to the plot against Length shown above, and the design value found.

8. Worked example 2: Deadweight carrier
Department of Naval Architecture & Marine Engineering
Bangladesh University of Engineering & Technology, Dhaka-1000
Worked example 2: Deadweight carrier
Estimate the dimensions of a dry cargo ship of 13,000 tonnes deadweight at a maximum draught of 8 metres and with a service speed of 15 knots.

9. Solution Department of Naval Architecture & Marine Engineering
Bangladesh University of Engineering & Technology, Dhaka-1000
Solution

10. Department of Naval Architecture & Marine Engineering
Bangladesh University of Engineering & Technology, Dhaka-1000
Solution (contd.)