The Irwin 52, a centre-cockpit staysail ketch, was designed by Ted Irwin and built in the USA by Irwin Yachts.
Underwater Profile: Fin keel & skeg-hung rudder
Hull Material: GRP (Fibreglass)
Length Overall: 52'0" (15.9m)
Waterline Length: 44'0" (13.4m)
Beam: 15'4" (4.7m)
Draft: 7'0" (2.1m)
Rig Type: Staysail Ketch
Displacement: 55,000lb (24,948kg)
Designer: Ted Irwin
Builder: Irwin Yachts (USA)
Year First Built: 1976
Year Last Built: 1985
Number Built: 250
1. Sail Area/Displacement Ratio: 15.2
2. Ballast/Displacement Ratio: 29.3
3. Displacement/Length Ratio: 288
4. Comfort Ratio: 48.3
5. Capsize Screening Formula: 1.6
1. A Sail Area/Displacement Ratio of 15.2 suggests that the Irwin 52 will need a stiff breeze to get her going. In light conditions, unless you've got plenty of time on your hands, motor-sailing may be the way to go.
2. A Ballast/Displacement Ratio of 29.3 means that a sailboat like the Irwin 52 (which doesn't have a stiffness-enhancing bulb keel), is likely to benefit from being reefed early to keep her sailing upright in a moderate breeze.
3. A Displacement/Length Ratio of 288, tells us the Irwin 52 is clearly a heavy displacement cruising boat. You can load her down with all your cruising gear and equipment and it will hardly affect her waterline. Not an ideal choice for coastal sailing, but she'll come into her own on an offshore passage in testing conditions.
4. Ted Brewer's Comfort Ratio of 48.3 suggests that crew comfort of an Irwin 52 in a seaway is similar to what you would associate with the motion of a heavy bluewater cruising boat. Pitching and rolling will be well damped - your cup of coffee on the salon table stands a reasonable chance of staying there in most conditions.
5. The Capsize Screening Formula (CSF) of 1.6 tells us that an Irwin 52 would be a safer choice of sailboat for an ocean passage than one with a CSF of more than 2.0.
Jun 07, 23 01:51 AM
Jun 04, 23 08:32 AM
Jun 04, 23 06:26 AM