Swan 431
{{Short description|Finnish sailboat class}}
{{Use dmy dates|date=March 2023}}
{{Use British English|date=March 2023}}
{{Infobox sailboat specifications
|name = Swan 431
|insignia =
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|designer = Sparkman & Stephens
|architect =
|location = Finland
|year = 1976
|no built = 32
|design =
|class =
|brand =
|builder = Oy Nautor AB
|boats =
|crew =
|trapeze =
|draft = {{convert|7.40|ft|m|abbr=on}}
|air draft =
|displacement = {{convert|26500|lb|kg|0|abbr=on}}
|hulls =
|hull type = monohull
|construction = glassfibre
|loa = {{convert|43.25|ft|m|abbr=on}}
|loh =
|lwl = {{convert|33.33|ft|m|abbr=on}}
|beam = {{convert|13.41|ft|m|abbr=on}}
|hull draft =
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|engine = Perkins Engines 4-108M {{convert|37|hp|kW|0|abbr=on}} diesel engine
|appendages =
|keel type = swept fin keel
|ballast = {{convert|11900|lb|kg|0|abbr=on}}
|rudder type = Skeg-mounted rudder
|rigs =
|rig type = Bermuda rig
|I = {{convert|59.00|ft|m|abbr=on}}
|J = {{convert|17.92|ft|m|abbr=on}}
|P = {{convert|53.25|ft|m|abbr=on}}
|E = {{convert|13.75|ft|m|abbr=on}}
|mast length =
|rig other =
|sails =
|sailplan = Masthead sloop
|sailarea main = {{convert|366.09|sqft|m2|abbr=on}}
|sailarea headsail = {{convert|529.53|sqft|m2|abbr=on}}
|sailarea spin =
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|sails other =
|sailarea upwind =
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|sailarea total = {{convert|895.62|sqft|m2|abbr=on}}
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|phrf = 84-93
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The Swan 431 is a Finnish sailboat that was designed by Sparkman & Stephens cruiser-racer and first built in 1976. The boat is Sparkman & Stephens' design #2238-C1.{{cite web|url= https://sailboatdata.com/sailboat/swan-431/|title= Swan 431 sailboat |access-date= 11 April 2023|last= McArthur|first= Bruce|work= sailboatdata.com|year= 2023|archive-url= https://archive.today/20230411195414/https://sailboatdata.com/sailboat/swan-431/|archive-date= 11 April 2023|url-status= live}}{{cite web|url= https://sailboat.guide/nautor/swan-431|title= Swan 431|access-date= 11 April 2023|author= Sea Time Tech, LLC|work= sailboat.guide|year= 2023|archive-url= https://archive.today/20230411195429/https://sailboat.guide/nautor/swan-431|archive-date= 11 April 2023|url-status= live}}{{cite web|url= https://sailboatdata.com/designer/sparkman-stephens|title= Sparkman & Stephens|access-date = 11 April 2023|last= McArthur| first = Bruce |work = sailboatdata.com|year = 2023|archive-url= https://archive.today/20200810200933/https://sailboatdata.com/designer/sparkman-stephens|archive-date= 10 August 2020|url-status= live}}{{cite web|url= https://sailboat.guide/sparkman-stephens|title= Sparkman & Stephens|access-date= 11 April 2023|author= Sea Time Tech, LLC|work= sailboat.guide|year= 2023|archive-url= https://archive.today/20220621155228/https://sailboat.guide/sparkman-stephens|archive-date= 21 June 2022|url-status= live}}
Production
The design was built by Oy Nautor AB in Finland, from 1976 to 1978 with 32 boats completed, but it is now out of production.{{cite web|url = https://sailboatdata.com/builder/nautor-swan-sailboats|title = Nautor (Swan sailboats)|access-date = 11 April 2023|last= McArthur| first = Bruce |work = sailboatdata.com|year = 2023|archive-url= https://archive.today/20220407233954/https://sailboatdata.com/builder/nautor-swan-sailboats|archive-date= 7 April 2022|url-status= live}}{{cite web|url= https://sailboat.guide/nautor|title= Nautor (Swan sailboats)|access-date= 11 April 2023|author= Sea Time Tech, LLC|work= sailboat.guide|year= 2023|archive-url= https://archive.today/20230406230707/https://sailboat.guide/nautor|archive-date= 6 April 2023|url-status= live}}
Design
The Swan 431 is a recreational keelboat, built predominantly of glassfibre, with wood trim. It has a masthead sloop rig, a raked stem, a reverse transom, a skeg-mounted rudder controlled by a wheel and a fixed swept fin keel. It displaces {{convert|26500|lb|kg|0|abbr=on}} and carries {{convert|11900|lb|kg|0|abbr=on}} of ballast.
The boat has a draft of {{convert|7.40|ft|m|abbr=on}} with the standard keel.
The boat is fitted with a British Perkins Engines 4-108M diesel engine of {{convert|37|hp|kW|0|abbr=on}} for docking and manoeuvring. The fuel tank holds {{convert|40|u.s.gal}} and the fresh water tank has a capacity of {{convert|100|u.s.gal}}.
The design has sleeping accommodation for nine people, with a double "V"-berth in the bow cabin, two straight settee berths and two pilot berths in the main cabin and two aft cabins with a double berth in the starboard cabin and a single berth in the port cabin. The galley is located on the port side just abeam of the companionway ladder. The galley is of straight configuration and is equipped with a three-burner stove, an ice box and a sink. A navigation station is opposite the galley, on the starboard side. There are two heads, one just aft of the bow cabin on the port side and one on the starboard side aft.
The design has a hull speed of {{convert|7.74|kn|km/h|abbr=on}} and a PHRF handicap of 84 to 93.{{cite web|url= https://www.ussailing.org/competition/offshore/phrf/phrf-handicaps/|title= PHRF Handicaps|access-date= 11 April 2023|author= US Sailing|author-link= US Sailing|work= ussailing.org|year= 2023}}
See also
References
{{Reflist}}
{{Sailboat types built by Nautor Swan}}
{{Sparkman & Stephens}}
Category:1970s sailboat type designs