Bollard Pull Test on Tug Boat Bahar-9

Bollard Pull Test on Tug Boat Bahar-9

The tug boat TB. BAHAR 9 had request to use Marine Survey Services for Bollard Pull Test, whilst she was lying safety afloat and starboard alongside at PT. Bandar Victory Shipyard, Batam for the purpose of calculation and ascertained the bollard pull of the vessel

Vessel’s Particulars :

Name of Vessel                 :   BAHAR - 9                    

Type of Vessel                  :   Motor Tug

Construction                      :   Steel

Year of Builder                   :   1999/Indonesia

GRT/NRT                          :   129 T / 77 T

Dimension                         :   20.76 m (L) x 6.50 m (B) x 3.00 m (D)

Main Engine                       :   CATERPILLAR of 2 x 650 HP (1800 RPM)

General Inspection

The bollard pull calculation is referring to the book titled tug, TOWBOATS AND TOWING written by Edward M. Braddy issued by Cornel Maritime Press Inc, USA in 1967 as our basic calculation.

Calculation of Bollard Pull

From static bollard for 2 engines :

BHP    = K x (total power value from above)

K                 = 1.10 for geared diesel (2 x 650 hp = 1300 hp)

Static bollard pull with 1800 RPM

BHP    = 1.10 x 1300

                   = 1430

where:          T                 =       Static Bollard Pull

                             BHP    =       Brake Horse Power

                             SHP    =       Shaft   Horse Power

                             SHP    =       BHP

For illustrate                      :         T        =       1.3 x BHP/100

                                                                                      =       18.59 Tons

For Hydroconic Hull   :         T        =       SHP/61

                                                                                      =       23.44 Tons

For Kort Nozzle Tug :         T        =       BHP/57

                                                                                      =       25.09 Tons

                                                         

Conclusion

Calculation for	Bollard Pull	Engine RPM/RGP
Illustration Hydroconic Hulls Kort Nozzle Tugs	18.59 Tons 23.44 Tons 25.09 Tons	1800RPM/360 1800RPM/360 1800RPM/360

Comments

Satisfactory

Bollard Pull Test on Tug Boat

 

“This inspection has been carried out to the best of our knowledge and liability where our responsibility is limited of reasonable care”

 

Bollard Pull Test on Tug Boat Bahar-9 was done and had result satisfactory for the Bollard Pull


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