Hallberg-Rassy Monsun 31
{{short description|Swedish sailboat}}
{{Use dmy dates|date=October 2021}}
{{Use British English|date=October 2021}}
{{Infobox sailboat specifications
| name = Hallberg-Rassy Monsun 31
| rigs =
| mast length =
| E =
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| rig type = Bermuda rig
| rudder type = Keel hung
| sails =
| ballast = {{convert|4200|lb|kg|abbr=on}}
| keel type = Full keel
| appendages =
| engine = Volvo Penta MD11 C, {{convert|23|hp|kW|0|abbr=on}} diesel engine
| hull weight =
| hull draft =
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| sailplan = Masthead sloop
| lwl = {{convert|24.67|ft|m|abbr=on}}
| sailarea total = {{convert|39|m2|ft2|abbr=on}}
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| sailarea downwind =
| sailarea main = {{convert|19|m2|ft2|0|abbr=on}}
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| sailarea gen =
| sailarea spin = {{convert|71|m2|ft2|0|abbr=on}}
| lp =
| sailarea headsail = {{convert|12|m2|ft2|0|abbr=on}} to {{convert|31|m2|ft2|0|abbr=on}}
| beam = {{convert|9.42|ft|m|abbr=on}}
| loh =
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| designer = Olle Enderlein
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| caption = Hallberg-Rassy Monsun 31 under sail
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| location = Sweden
| loa = {{convert|30.75|ft|m|abbr=on}}
| trapeze =
| construction = Fiberglass
| hull type = Monohull
| hulls =
| displacement = {{convert|9250|lb|kg|abbr=on}}
| air draft =
| draft = {{convert|4.58|ft|m|abbr=on}}
| crew =
| year = 1974 - 1982
| boats =
| role = daysailing / cruising
| builder = Hallberg-Rassy
| brand = Hallberg-Rassy
| class =
| design =
| no built = 904
| successor = Hallberg-Rassy 31
}}
The Hallberg-Rassy Monsun 31 is a Swedish sailboat designed by Olle Enderlein in GRP and built between 1974 and 1982. The yacht is known for its traditional long keel, high build quality and sleek lines as a blue water cruiser. It is the best selling Hallberg-Rassy sailing boat to date with 904 hulls built.{{Cite web|title=Hallberg-Rassy Monsun 31|url=https://www.hallberg-rassy.com/yachts/previous-models/hallberg-rassy-monsun-31/|access-date=2020-11-22|website=www.hallberg-rassy.com|language=en}}{{Cite web|last=|first=|date=|title=MONSUN 31 Sailboat|url=https://sailboatdata.com/sailboat/monsun-31|archive-url=|archive-date=|access-date=2021-01-23|website=sailboatdata.com}}{{Cite web|last=Houston|first=Dan|title=No7 Hallberg-Rassy Monsun 31|url=https://classicsailor.com/2019/05/no7-hallberg-rassy-monsun-31/|access-date=2021-01-23|website=Classic Sailor|language=en-GB}}
Design
The Monsun is a Bermudan rigged masthead sloop with an aft cockpit and a mahogany interior. The design was based on Hallberg-Rassy's larger sister model, Rasmus 35, and was one of the first models to use Hallberg-Rassy's signature windscreen, which was innovative at the time. It has an encapsulated fuel tank inside the keel under the engine and was delivered with a 23 hp inboard diesel engine.
Famous voyages
Kurt Björklund did three and a half circumnavigations of the planet on his Monsun, 'Golden Lady', before retiring it in the Råå museum in Scania, Sweden.{{Cite web|title=Kurt Björklund – Råå Museum|url=https://raamuseum.se/234-2/|access-date=2021-01-23|language=sv-SE}}