The Gulfstar 50 Sailboat
Specs & Key Performance Indicators
The Gulfstar 50, a centre-cockpit ketch, was designed by Vincent Lazarra and built in the USA by Gulfstar Yachts.
A Gulfstar 50 Ketch - also available as a sloop
Published Specification for the Gulfstar 50
Underwater Profile: Fin keel with skeg-hung rudder
Hull Material: GRP (Fibreglass)
Length Overall: 50'0" (15.2m)
Waterline Length: 39'8" (12.1m)
Beam: 13'8" (4.2m)
Draft: 5'6" (1.7m)
Rig Type: Ketch
Displacement: 35,000lb (15,876kg)
Designer: Vincent Lazarra
Builder: Gulfstar Yachts (USA)
Year First Built: 1975
Year Last Built: 1980
Number Built: 250
Published Design Ratios for the Gulfstar 50
1. Sail Area/Displacement Ratio: 13.5
- Less than 16 would be considered under-powered;
- 16 to 20 would indicate reasonably good performance;
- Over 20 suggests relatively high performance.
2. Ballast/Displacement Ratio: 30.0
- Under 40: less stiff, less powerful
- Over 40: stiffer, more powerful
3. Displacement/Length Ratio: 250
- Under 100: Ultralight
- 100 to 200: Light
- 200 to 275: Moderate
- 275 to 350: Heavy
- Over 350: Ultraheavy
4. Comfort Ratio: 38.9
- Under 20 indicates a lightweight racing boat
- 20 to 30 indicates a coastal cruiser
- 30 to 40 indicates a moderate offshore cruising boat
- 40 to 50 indicates a heavy offshore boat
- Over 50 indicates an extremely heavy offshore boat
5. Capsize Screening Formula: 1.7
- Under 2.0 (the lower the better): Better suited for ocean passages
- Over 2.0: Less suited for ocean passages
read more about these Key Performance Indicators...
Summary Analysis of the Design Ratios for the Gulfstar 50
1. A Sail Area/Displacement Ratio of 13.5 suggests that the Gulfstar 50 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 30.0 means that a sailboat like the Gulfstar 50 (which doesn't have its ballast concentrated in a bulb at the foot of a deep keel), is likely to benefit from being reefed early to keep her sailing upright in a moderate breeze.
3. A Displacement/Length Ratio of 250, tells us the Gulfstar 50 is a moderate displacement cruiser, which means she'll carry all your cruising gear without it having a dramatic effect on her performance. Most of today's sailboats intended for offshore cruising fall into this displacement category.
4. Ted Brewer's Comfort Ratio of 38.9 suggests that crew comfort of a Gulfstar 50 in a seaway is similar to what you would associate with the motion of a moderate bluewater cruising boat - a predictable and acceptable motion for most seasoned sailors.
5. The Capsize Screening Formula (CSF) of 1.7 tells us that a Gulfstar 50 would be a safer choice of sailboat for an ocean passage than one with a CSF of more than 2.0.
Other sailboats in the Gulfstar range include:
Sep 20, 22 09:56 AM
If you're a fan of traditional cruising yachts, then you must take a look at 'Silver Heels', a beautiful Alajuela 38 sailboat for sale...
Sep 18, 22 08:06 AM
Looking for used sailboats for sale that are capable of crossing an ocean? These cruising yachts are already in the Caribbean, but what are the risks and benefits of buying out there?
Sep 16, 22 08:12 AM
'Calypso', my Van de Stadt 30 sailboat is for sale. With all lines leading back to the cockpit, she's the perfect single-handers' liveaboard cruising sailboat.