Cal T/4 Information, Review, Specs

Sailing Performance & Handling

The Cal T/4 is defined by its responsiveness and its ability to punch above its weight class in light to moderate air. Because it was designed under the MORC rule, the hull features a relatively flat bottom and a fine entry, allowing it to plane under the right conditions—a rarity for 1970s cruisers of this size. With a displacement of approximately 2,250 pounds and a ballast-to-displacement ratio that leans toward the performance end of the spectrum, the boat feels stiff once the swing keel is fully deployed and locked.

The boat’s handling is characterized by a "light touch" at the helm, provided the sail plan is balanced. Owners often report that the boat tracks surprisingly well for a swing-keel design, though like most Lapworth designs, it rewards active trimming. The 650-pound retractable keel provides the necessary righting moment for breezy afternoons, but the boat's light weight means it can be "tender" (prone to heeling) if over-canvassed. Its performance profile is often compared to the Cal 25, though the T/4's ability to retract its keel allows it to explore thin water and beach launch, a versatility that fixed-keel siblings lack.

Interior Comfort & Variations

The interior of the Cal T/4 is a masterclass in early 1970s space optimization, utilizing a "flush deck" design to maximize volume below the waterline. This design choice eliminates the traditional trunk cabin, creating a wide, open-feeling salon that is unusually spacious for a 24-footer. To solve the problem of limited headroom inherent in flush-deck boats, Jensen Marine equipped the T/4 with a "pop-top" hatch. When raised, this fiberglass section provides over six feet of standing headroom in the galley and main cabin area, secured by canvas sides with mesh windows for ventilation.

The layout typically features a V-berth forward, followed by a compact marine head (often a portable or chemical toilet in original configurations) and a main salon with two settee berths. A small galley is usually situated near the companionway. While the T/4 did not have the sheer number of layout variations seen in larger models like the Cal 34, it shared a hull philosophy with the Cal 2-24. However, the T/4's retractable keel and pop-top distinguish it as the more "adventurous" sibling, intended for owners who wanted to mix weekend racing with coastal gunkholing.

Known Issues & Buyer’s Checklist

Prospective buyers should approach a Cal T/4 with a specific focus on its mechanical and structural "moving parts." As a vintage trailerable, the most critical point of failure is the swing keel assembly.

• Swing Keel & Winch: The 650-pound keel is raised via a cable and winch system. Inspect the cable for fraying and the winch for corrosion. More importantly, the pivot bolt and the trunk itself should be checked for "clunking" or lateral movement, which indicates wear in the bushings or structural fatigue in the trunk.
• The Pop-Top Seal: The mechanism for the pop-top is a common source of leaks. The rubber gaskets and the canvas enclosure often degrade over decades. Check for water staining on the interior bulkheads directly beneath the hatch tracks.
• Deck Delamination: Like many Jensen Marine products of this era, the T/4 uses a balsa-cored deck. Soft spots are common around the chainplates, stanchion bases, and the pop-top hardware. A thorough percussion test (tapping with a plastic hammer) is recommended to identify delamination.
• Compression Post: Ensure the load-bearing post beneath the mast step is structurally sound and that the deck hasn't "compressed" or sagged, which can lead to rig tension issues and interior door misalignment.

Community & Resources

Owners of the Cal T/4 benefit from a highly dedicated and technically proficient community. The Cal Boats Owner's Association remains one of the most active vintage boat groups, maintaining archives of original brochures and manual scans. Because many T/4 parts were standardized across the Jensen Marine line, technical support for rigging and hardware is often found through general Cal-specific technical wikis and regional yacht club archives in Southern California and the Chesapeake Bay, where the model was most popular.

The Verdict

The Cal T/4 is a quintessential "sleeper" in the used boat market—a trailerable racer-cruiser that offers genuine Lapworth performance at a fraction of the cost of modern equivalents. While it requires more maintenance than a fixed-keel boat due to its swing keel and pop-top, the reward is a versatile vessel that is as comfortable at a yacht club racing mark as it is in a shallow, secluded cove.

Pros:

• Trailerability: Easily moved between cruising grounds without the need for expensive slip fees.
• Sailing Pedigree: Excellent light-air performance and a competitive MORC heritage.
• Headroom: The pop-top provides standing room that is nearly non-existent in other 24-foot flush-deck boats.

Cons:

• Maintenance Intensity: The swing keel and pop-top mechanisms require regular inspection and parts replacement.
• Tenderness: The light displacement means the boat heels quickly, requiring early reefing in heavy weather.
• Aging Hardware: Original 1970s deck hardware and electrical systems almost certainly require modernization for safe cruising.