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HARMONY 31 built by Tyler Boat Co. Ltd. (UK) and designed by E. G. van de Stadt. Her first hull was built in 1964 with an overall lengh of 9.50 m or 31.17 ft long

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HARMONY 31 Sailboat Specifications​


Overall Length (LOA) m / ft9.50 m / 31.17 ft
Builder(s)Tyler Boat Company Ltd
Designer(s)E. G. van de Stadt
CountryUnited Kingdom
Hull TypeModified Full Keel
Number of Hulls Built50
First Hull Built1964
Last Hull Built1968
Ballast TypeLead
Rigging TypeMasthead Sloop
Ballast Ratio41.67


Overall Length (LOA) 9.50 m / 31.17 ft
Waterline Length (LWL)7.45 m / 24.44 ft
Beam (width)2.80 m / 9.19 ft
Draft1.43 m / 4.69 ft
Light Displacement (MLC) 4800 kg / 10582 lb
Maximum Displacement4800 kg / 10582 lb
Ballast Weight2000 kg / 4409 lb


Capsize Screening Formula (CSF)1.68
Comfort Ratio32.2
Displacement-Length Ratio (DLR)323.61
Ballast Ratio41.67
Sail Area to Displacement13.86

Above Deck

Estimated Forestay Length12.28 m / 40.30 ft
Reported Sail Area38.65 m² / 416.00 ft²
Total Sail Area38.67 m² / 416.22 ft²
Mainsail Area16.74 m² / 180.18 ft²
I38.38 ft * 11.70 m
J12.30 ft * 3.75 m
P32.32 ft * 9.85 m
E11.15 ft * 3.40 m
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