Allmand 31
{{Short description|Sailboat class}}
{{Use dmy dates|date=August 2019}}
{{Use American English|date=August 2019}}
{{Infobox sailboat specifications
|name = Allmand 31
|class_image =
|line drawing =
|line size =
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|line caption =
|image boat =
|image size =
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|designer = Walter Scott
|location = United States
|year = 1978
|no built =
|design =
|class =
|brand =
|builder = Allmand Boats
|role =
|boats =
|crew =
|trapeze =
|draft = {{convert|3.83|ft|m|abbr=on}}
|air draft =
|displacement = {{convert|11100|lb|kg|0|abbr=on}}
|hulls =
|hull type = Monohull
|construction = Fiberglass
|loa = {{convert|30.75|ft|m|abbr=on}}
|loh =
|lwl = {{convert|27.92|ft|m|abbr=on}}
|beam = {{convert|11.33|ft|m|abbr=on}}
|hull draft =
|hull weight =
|engine = Universal M16 or M35 {{convert|20|hp|kW|0|abbr=on}} diesel engine
|appendages =
|keel type = fin keel
|ballast = {{convert|4300|lb|kg|0|abbr=on}}
|rudder type = skeg-mounted rudder
|rigs =
|rig type = Bermuda rig
|I = {{convert|41.00|ft|m|abbr=on}}
|J = {{convert|12.00|ft|m|abbr=on}}
|P = {{convert|34.40|ft|m|abbr=on}}
|E = {{convert|12.50|ft|m|abbr=on}}
|mast length =
|rig other =
|sails =
|sailplan = Masthead sloop
|sailarea main = {{convert|215.00|sqft|m2|abbr=on}}
|sailarea headsail = {{convert|246.00|sqft|m2|abbr=on}}
|lp =
|sailarea spin =
|sailarea gen =
|sails other =
|sailarea upwind =
|sailarea downwind =
|sailarea total = {{convert|461.00|sqft|m2|abbr=on}}
|rating =
|d-pn = 85.5
|rya-pn =
|phrf =
|status =
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}}
The Allmand 31 is an American sailboat that was designed by Walter Scott as a cruiser and first built in 1978.{{cite web|url = https://sailboatdata.com/sailboat/allmand-31|title = Allmand 31 sailboat specifications and details|accessdate = 7 August 2019|last= McArthur| first = Bruce |work = sailboatdata.com|year = 2019|archiveurl = https://web.archive.org/web/20190701182324/https://sailboatdata.com/sailboat/allmand-31|archivedate =1 July 2019|url-status= live}}{{cite web|url =https://sailboatdata.com/designer/scott-walter|title = Walter Scott|accessdate = 7 August 2019|last= McArthur| first = Bruce |work = sailboatdata.com|year = 2019|archiveurl = https://web.archive.org/web/20190226045932/https://sailboatdata.com/designer/scott-walter|archivedate =26 February 2019|url-status= live}}Sherwood, Richard M.: A Field Guide to Sailboats of North America, Second Edition, pages 376-377. Houghton Mifflin Company, 1994. {{ISBN|0-395-65239-1}}
The Allmand 31 design was originally marketed as the Sail 31 and was later sold as the Allmand 312, with the same deck and hull, but a different interior layout.
Production
The design was built by Allmand Boats in Hialeah, Florida, United States from 1978 to 1985, but it is now out of production.{{cite web|url =https://sailboatdata.com/builder/allmand-boats-incusa|title =Allmand Boats Inc. (USA) 1965 - 1985 |accessdate = 7 August 2019|last= McArthur| first = Bruce |work = sailboatdata.com|year = 2019|archiveurl = https://web.archive.org/web/20190807191501/https://sailboatdata.com/builder/allmand-boats-incusa|archivedate =7 August 2019|url-status= live}}
Design
The Allmand 31 is a recreational keelboat, built predominantly of fiberglass, with wood trim. The deck has an end-grain balsa core. It has a masthead sloop rig with aluminum spars, a raked stem, a near-vertical transom, a skeg-mounted rudder controlled by a wheel and a short fixed fin keel. It displaces {{convert|11100|lb|kg|0|abbr=on}} and carries {{convert|4300|lb|kg|0|abbr=on}} of iron ballast with the standard rig or lead with the tall rig.{{cite web|url = https://www.cruisingworld.com/sailboats/allmand-31-florida-born-and-bound/|title = Allmand 31: Florida Born and Bound|access-date = 7 August 2019|last = Nestor|first = Gregg|work = Cruising World|date = 25 January 2011|archiveurl = https://web.archive.org/web/20171009181148/http://www.cruisingworld.com/sailboats/allmand-31-florida-born-and-bound|archivedate = 9 October 2017|url-status= live}}
The boat has a draft of {{convert|3.83|ft|m|abbr=on}} with the standard keel fitted.
A tall rig was optional, with a mast about {{convert|2.0|ft|m|abbr=on}} higher than standard for use in locations with light winds.
The boat is fitted with a Universal M16 or M35 diesel engine of {{convert|20|hp|kW|0|abbr=on}}. Some sources state the standard engine was a Universal {{convert|16|hp|kW|0|abbr=on}} M-20 diesel, with a Universal {{convert|21|hp|kW|0|abbr=on}} M-25 optional. The fuel tank holds {{convert|28|u.s.gal}} and the fresh water tank has a capacity of {{convert|40|u.s.gal}}.
The design has a galley on the starboard side, including an 8 {{convert|95|cuft|m3|abbr=on}} icebox and pressure water. The head is located forward on the port side, just aft of the bow "V"-berth. Additional sleeping accommodation includes an aft cabin under the cockpit, a port side main cabin settee that converts to a double and a starboard side settee/berth for total sleeping space for seven people. The dinette also seats seven people.
Ventilation is provided by hatches over the aft cabin, main cabin and bow cabin, plus seven opening ports.
Two winches are provided in the cockpit for the genoa sheets and a winch on the mast for the mainsail halyard, plus another winch for the genoa halyard.
The design has a Portsmouth Yardstick racing average handicap of 85.5.
Operational history
In a review Richard Sherwood wrote, "the Allmand is claimed to have a tacking angle of 84 degrees.
Because beam on deck is 11 feet 4 inches and 8 feet 6 inches at the water, after initially heeling she picks up a large amount of buoyancy and is stiff. The long water line allows for additional internal volume."
Gregg Nestor wrote a review of the design in Cruising World in 2013, noting its sailing qualities, "under sail, the boat accelerates quickly, but windward performance is hampered by its wide beam and shoal draft. Although the 31 will tack through about 90 degrees and is extraordinarily stiff and sails almost level, it makes noticeable leeway. Its best points of sail are off the wind." He concluded, "the strongest features of the Allmand 31 are its generous interior and its spacious cockpit. Its moderate rig is easily managed, but the shoal draft and the smallish sail area make the Allmand 31 a better candidate for coastal cruising than bluewater sailing. The boat is solidly constructed and doesn’t look that dated, but the builder wasn’t known for sailboats, and this probably accounts for the 31’s current depressed price"
A review in Practical Sailor, stated, "this 1970's era cruiser is beloved for its roomy, tri-cabin interior, but it does not sail close to the wind and the shoal keel makes excessive leeway.".{{cite web|url = https://www.practical-sailor.com/reviews/boatreview/The-Allmand-Sail-31-11863-1.html|title = The Allmand Sail 31|access-date = 7 August 2019 |work = Practical Sailor|archiveurl = https://web.archive.org/web/20190807200551/https://www.practical-sailor.com/reviews/boatreview/The-Allmand-Sail-31-11863-1.html|archivedate = 7 August 2019|url-status= live}}