iNVESTIGATOR)563
Stats and Calculations
LOA 18'6" (5.63m)
LWL 16'4"
Beam 6'11"
Draft 1'9" (board up)
Draft 3'9" (down)
Displacement 1650lb
Ballast 763lb
Working sail 178sqft
Hullspeed 5.4kts
Horsepower 3.0hp
Sail area to displacement (SA/D) 1.3
Capsize ratio 2.3
Ballast ratio 49%
Buoyancy ratio 1.29
Notes to calculations
Hullspeed calculated as 1.34 multiplied by the square root of LWL (in ft)
Horsepower refers to the force required to drive the vessel at hullspeed.
Higher figures for SA/D are generally associated with racing yachts.
Capsize screening ratios less than 2 imply the vessel is more suitable for offshore work.
Buoyancy ratios greater than one are desirable (based on the requirement for 0.99cu.ft of buoyancy for each 30kg of displacement, plus a 25% safety margin)
Outboard well
Early model Investigators had a port-side through-hull opening for an outboard motor. The outboard was simply tilted down when is use, or up when under sail.
Later model Investigators have a transom-mounted auxilliary, with the previous outboard opening converted to a seat/locker.