Graph partition: Difference between revisions

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{{Orphan|date=February 2009}}
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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. (Rousmaniere, 1999)
 
A DLR is calculated by dividing a boat's [[displacement (fluid)|displacement]] in [[long ton]]s (2,240 pounds) by the cube of one one-hundredth of the waterline length (in feet):
 
:<math>\mathit{DLR} = \frac{\mathit{displacement}(\mathrm{lb}) ~/~ 2240} {(0.01 \times \mathit{LWL}(\mathrm{ft}))^3}.</math>
 
The DLR can be used to compare the relative mass of various boats no matter what their length. A DLR less than 200 is indicative of a racing boat, while a DLR greater than 300 or so is indicative of a heavy cruising boat.
 
==References==
* Rousmaniere, J,  The Annapolis Book of Seamanship  Simon & Schuster, New York, New York,  Chapter 1:  The boat p26-35, 1999. ISBN 0-684-85420-1
* http://www.sailingusa.info/design_winds.htm
 
{{DEFAULTSORT:Displacement-length ratio}}
[[Category:Ship measurements]]
[[Category:Nautical terms]]
[[Category:Engineering ratios]]
 
 
{{Shipbuilding-stub}}

Latest revision as of 22:32, 10 November 2014

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