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What mathematical formula do architectural engineers use in calculating the bollard pull of a tug boat?
Wiki User
∙ 10y ago
Engineers use almost all mathematical formulas that exist, since engineering covers the entire range of science.
Normally we use a simple formula
if tug has amain engines and standard 4:1 gear box : we use formula of 1/ 10
if you bhp is 900 , you get Normal 9 bollard pull
how ever if you have Kort nozzles & K type propeller you can multiply by 1.3 henf 9 x 1.3 = 11.7 approx 12
you have to do Bolard pul test wiht Steel wire rope as it has no Give and use a standard length of 120 meters
sea condition has ot be "CALM " or Still normally one hour after high tide
angle of rope has to not over 2 - 5 degrees over 120 meter
never do Bollard pull test with Nylon ropes or length below 120 meters
the test is then invalid
you can get very high bollard pul if you increase Reduction gear by say
16 : 1 and use large Pitch and Diameter propllers wiht slow speed engines max 100 rpm - 120 rpm call me if you need advice
Wiki User
∙ 10y ago
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When was The Bollard created?
The Bollard was created in 2005.
When was Alan Bollard born?
Alan Bollard was born in 1951.
Are bollard covers a new technology?
A bollard is a short vertical post used to block vehicles, to prevent travel in an area or to avoid damage to something behind the bollard. Bollard covers protect the bollard from superficial damage and weathering, and are not a particularly new technology.
What does bollard mean in french?
"Bollard" in French is "bornard" or "bollard". It refers to a sturdy, short post used to control traffic or secure boats.
Calculating the Bollard Pull of a Tug Boat?
1) First up draw BODY PLAN for your tug boat with reasonable number of stations.. 2) Find the sectional areas (of each station) from the body plan till the required draft... 3) Then using simpson's rule,simpsonize the areas and find the volume... 4) Then find the summation of volume.. this gives the volume of displacement.. 5) We can hence find bollard pull using the relation Bollard pull = ((Displacement * 60)/1,00,000)+ 40
How do you use bollards in a sentence?
bollard
How many tones in one meter cube bollards?
Probably just one primary tone per bollard, along with any harmonics. These will depend on the resonance frequency of the bollard.Probably just one primary tone per bollard, along with any harmonics. These will depend on the resonance frequency of the bollard.Probably just one primary tone per bollard, along with any harmonics. These will depend on the resonance frequency of the bollard.Probably just one primary tone per bollard, along with any harmonics. These will depend on the resonance frequency of the bollard.
What is the name of the post on a pier that a ship is tied to with a hawser?
It is a "bollard." The hawser (rope) is attached to the bollard to anchor a ship in position at a pier or wharf.
How do you calculate bollard pull from horsepower?
sshi
What is bollard pull cpacity for anchor handling tug is it same as winch line pull?
anchor handling winch and winch wire is designed based on bollard pull requirement. winch wire breaking strength is 2 to 2.5 times of bollard pull force. anchor winch brake holding is 1.5 time of bollard pull or 80% of wire breaking strength
What are the definition of bollard?
A bollard is a short, vertical post, usually made of wood, steel or concrete. The are used for mooring ships as well as traffic protection devices.
What do you call the metal posts that ships tie to?
bollard
