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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