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Understanding and calculating marine displacement is essential for the design and operation of ships. This tutorial delves into the formulas and calculations associated with marine displacement, focusing on length, breadth, draft, and block coefficient.
The displacement or displacement tonnage of a ship is its weight. As the term indicates, it is measured indirectly, using Archimedes' principle, by first calculating the volume of water displaced by the ship, then converting that value into weight.
The displacement–length ratio (DLR or D/L ratio) is a calculation used to express how heavy a boat is relative to its waterline length. [1] DLR was first published in Taylor, David W. (1910).
1 sty 2003 · The key parameter here is the SA-D ratio, which is calculated for a sloop or cutter by determining the nominal area of the mainsail and the foretriangle in square feet, and dividing their sum by the boat’s displacement in cubic feet taken to the two-thirds power.
28 kwi 2010 · To find a boat’s D/L ratio, you first calculate its displacement in long tons (DLT), with 1 long ton equaling 2,240 pounds. Then take the boat’s load waterline length (LWL), multiply it by 0.01, and cube the result. Finally, take this result and divide it into DLT.
The sail area-displacement ratio ( SA/D) is a calculation used to express how much sail a boat carries relative to its weight. [1] In the first equation, the denominator in pounds is divided by 64 to convert it to cubic feet (because 1 cubic foot of salt water weights 64 pounds).
17 paź 2019 · The displacement to length ratio of a boat is a good comparing parameter for most boats. It is usually referred to sailing boats and it is also seen with the symbol D/L . Basically it shows how heavy the boat is in comparison to the waterline length.
