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Bollard pull is a conventional measure of the pulling (or towing) power of a watercraft.It is defined as the force (usually in tonnes-force or kilonewtons (kN)) exerted by a vessel under full power, on a shore-mounted bollard through a tow-line, commonly measured in a practical test (but sometimes simulated) under test conditions that include calm water, no tide, level trim, and sufficient ...
The capstan equation [1] or belt friction equation, also known as Euler–Eytelwein formula [2] (after Leonhard Euler and Johann Albert Eytelwein), [3] relates the hold-force to the load-force if a flexible line is wound around a cylinder (a bollard, a winch or a capstan). [4] [1]
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This image is a derivative work of the following images: Bollard pull idealized.jpg licensed with PD-self . 2007-12-10T14:20:47Z Himbeerkuchen 568x323 (53873 Bytes) {{Information |Description=illustration of a bollard pull trial under idealized conditions |Source=own work |Date=10 December 2007 |Author=[[user:Himbeerkuchen]] |Permission=Public Domain |other_versions=Bollard_pull_real.jpb
Autumn colours at Stourhead gardens. The landscape design phase consists of research, gathering ideas, and setting a plan. Design factors include objective qualities such as: climate and microclimates; topography and orientation, site drainage and groundwater recharge; municipal and resource building codes; soils and irrigation; human and vehicular access and circulation; recreational ...
Proportion wheels are simple circular slide rules used in graphic design to calculate aspect ratios. Lining up the original and desired size values on the inner and outer wheels will display their ratio as a percentage in a small window. Though not as common since the advent of computerized layout, they are still made and used. [citation needed]
A roller in a typical power farming application. The roller is an agricultural tool used for flattening land or breaking up large clumps of soil, especially after ploughing or disc harrowing.
Figural bollard sculptures in Geelong, Victoria Ex libris bollard outside Cambridge University Library, by Harry Gray. In Geelong, Victoria, Australia, decorative bollards, sculpted and painted by Jan Mitchell, are placed around the city to enhance the landscape as a form of outdoor public sculpture. Usually they are made of timber, minimally ...