http://home.cfl.rr.com/irwin104/specs.html

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

Mic 67