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IRWIN 10/4 SLOOP - Dimensions and Rigging Loads

Hull Dimensions

LOA: 25 ft 4 inches
LWL: 21 ft 10 inches
Maximum Beam: 10 ft 4 inches
Mast Height: 39 ft 6 inches (from DWL)
Draft: Centerboard up 2 ft 9 inches/Centerboard down 6 ft 8 inches (Orion: 3 ft 8 inches fixed wing keel w/extra ballast)
Displacement: 7000 lbs
Ballast: 2000 lbs (Orion: 2800 lbs +/-)

Rigging Dimensions

I Dimen: 35.0 ft
J Dimen: 12.0 ft
P Dimen: 30.16 ft
E Dimen: 12.25 ft

Mainsail Area

Standard Roach: 197.3 sq ft
Spinnaker Sail Area: 774.8 sq ft
End Boom Load: 1325.35 lbs

Foresail Area

100% Foretriangle Sail Area: 215.2 sq ft
135% Foretriangle Sail Area: 290.5 sq ft
150% Foretriangle Sail Area: 322.8 sq ft

Foresail SheetLoads

100% Foretriangle @ 30 Knots: 834.8 lbs
100% Foretriangle @ 35 Knots: 1136.3 lbs
100% Foretriangle @ 40 Knots: 1484.1 lbs
135% Foretriangle @ 20 Knots: 500.9 lbs
135% Foretriangle @ 25 Knots: 781.4 lbs
135% Foretriangle @ 30 Knots: 1127.0 lbs
150% Foretriangle @ 5 Knots: 34.8 lbs
150% Foretriangle @ 10 Knots: 139.1 lbs
150% Foretriangle @ 15 Knots: 313.1 lbs
150% Foretriangle @ 20 Knots: 556.6 lbs

Lead Block Loads

#3 Genoa @ 30 Knots: 1093.6 lbs
#3 Genoa @ 35 Knots: 1488.4 lbs
#3 Genoa @ 40 Knots: 1944.2 lbs
#1 Genoa @ 6 Knots: 37.6 lbs
#1 Genoa @ 12 Knots: 150.3 lbs
#1 Genoa @ 18 Knots: 338.1 lbs
#1 Genoa @ 20 Knots: 417.4 lbs
#1 Genoa @ 25 Knots: 652.2 lbs

Maximum Genoa Turning Lead Block

60 Degree Turn: 1136.3 lbs
90 Degree Turn: 1602.2 lbs
135 Degree Turn: 2090.8 lbs
180 Degree Turn: 2272.6 lbs

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