Lapworth combined moderate displacement with a short keel intended to reduce wetted surface, plus a ventral fin ahead of the spade rudder to improve tracking. The design proved it could win, taking first in the Stratford Shoals and Watch Hill races and second in Spring Off Soundings. Jensen built the boat in painstakingly hand-laid fiberglass, with a lead fin keel and a high-aspect, single-spreader rig on aluminum spars.
Design and Construction
The Cal 43’s hull is a solid fiberglass laminate that, according to period summaries, requires only minimal in-season maintenance. Jensen Marine laid up the fiberglass by hand.
The lead fin keel provides a 40-percent ballast ratio, which places the Cal 43 above 58 percent of comparable designs and gives her above-average resistance to heeling. The short keel was expressly intended to minimize wetted surface, while the ventral fin ahead of the spade rudder helps the boat track.
With a displacement-length ratio of 260, the Cal 43 falls into the “moderate racer” band. Forty-six percent of similar designs are heavier.
Rig, Performance, and Handling
The Cal 43 carries a high-aspect, single-spreader masthead rig on aluminum spars, with stainless steel and Dacron rigging. Her reference sail area is 832 square feet, producing a sail-area-to-displacement ratio of 18.1. With a 135-percent genoa, that ratio rises to 21.5.
Those figures put her ahead of 58 percent of similar boats in light wind, while also marking her as slightly overrigged for her class. Her theoretical hull speed is 7.6 knots.
The IOR-aware hull, low-wetted-surface short keel, and tracking fin produced a boat that was fast on the racecourse, not merely on paper.
Accommodations
Below, the Cal 43 was arranged for three cruising couples with full privacy, an unusual layout in a 43-foot hull of the period. She has three separate double cabins, two heads, a full-size galley, and three hatches that bring light and ventilation below.
The layout clearly favors private accommodation over an open saloon. That makes the Cal 43 as much a passage boat for three couples as a racer.
Engine and Equipment
Jensen Marine offered the Cal 43 with either Gray Marine or diesel power, while individual boats may have an inboard Universal gasoline engine. The original specification left the choice of propulsion to the buyer, which explains the mix of engines among the fourteen boats built.
Verdict
The Cal 43 combines Lapworth’s IOR-aware racing approach with an unusually private three-couple interior. She was built in hand-laid fiberglass and fitted with a lead fin keel, a tracking ventral fin, and a high-aspect rig.
Her numbers suggest a capable light-air performer that is slightly overrigged for her class, while her race record confirms genuine speed. With only fourteen built, any Cal 43 is a scarce find. Her three-cabin layout also sets her apart from the more open-saloon cruisers of the period.
Pros
- Proven race record: first in the Stratford Shoals and Watch Hill races, and second in Spring Off Soundings
- Three separate double cabins and two heads, providing full privacy for three couples
- Above-average ballast ratio and light-wind speed compared with peer designs
- Hand-laid fiberglass hull with minimal maintenance needs
Cons
- Only fourteen were built, limiting availability
- Slightly overrigged compared with similar sailboats
- Mixed original engine offerings—gasoline Gray Marine or Universal, or diesel—require inspection of each individual boat
