{{Short description|Sailboat class}} {{Infobox sailboat specifications |name = |image boat = Hz 1921.JPG |imagesize = |alt = |image caption = Two 5 Metres in 1940: the left yacht is ''Hazard'' designed by Knud Reimers and the right one is ''Maribell'' by Tore Holm. |insignia = |class_image = 5 Metre insigna.svg |image alt = |image size = |crew = 3 |hull type = Monohull |design = Development class |construction = |rig = Bermuda rig |keel type = Fixed |trapeze = |loa = About: {{convert|8.5|m|abbr=on}} |loh = |lwl = |beam = |draft = Maximum: {{convert|1.1|m|abbr=on}} |hull weight = Minimum: {{convert|1500|kg|abbr=on}} |mastheight = |mainsailandjib = |sailarea = |sailarea main = |sailarea headsail = |spinnaker = |d-pn = |rya-pn = |phrf = |year = 1929 (rule design) |designer = |location = |builder = |role = |updated = |status = }}
'''5 Metre''' is a development sailing class of French origin.<ref>{{citation |last=Gelin |first=Curt |title=500 segelbåtar i test: bakgrund, egenskaper, omdömen |year=2005 |publisher=Nautiska förlaget |location=Stockholm |language=sv |isbn=91-89564-19-7 |page=194 }}</ref>
==History== The 5 Metre rule was created in France in 1929 and not an according of the International rule in contrast to other Metre yachts.<ref>{{citation |last=Gelin |first=Curt |title=500 segelbåtar i test: bakgrund, egenskaper, omdömen |year=2005 |publisher=Nautiska förlaget |location=Stockholm |language=sv |isbn=91-89564-19-7 |page=194 }}</ref>
=== The formula === The measurement formula is given in the [https://www.5metre.fi/the-five 2021 International Five Metre Rating Rules]:
:<math> 5.000 \mbox{ metres} = \frac{L + \sqrt[2]{S} - F - \frac{B} {2}} {2} </math>
where * <math>L</math> = length for rating (as defined by rule 3.4) * <math>S</math> = measured sail area * <math>F</math> = freeboard in metres (as defined by rule 3.5) * <math>B</math> = width in metres (as defined by rule 3.6)
==See also== *5.5 Metre
==References== {{Reflist}}
==External links== * [https://www.5metre.fi/the-five The Five – sporty open racer for a group of three]
Category:Development sailing classes