Design and Construction
The Admiral 40 is built conventionally of hand-laid fiberglass laminate with a vacuum-bagged balsa core and a tabbed hull-to-deck joint. Where high-compression loads entered the structure, balsa core replaced plywood, and the bulkhead carrying the deck-stepped mast along with the heavy-duty chainplate structure showed capable craftsmanship in the reviewed example. The wing deck forward is deliberately kept short to center weight and help reduce wave slap, a choice that trades some forward trampoline area for a quieter motion in a seaway.
In cross section the hulls are fairly full, which affords significant buoyancy and underpins the boat's payload capacity. Cruising World's Boat of the Year evaluation noted that the stern dragged under the weight of displacement and payload during testing, a reminder that this is a volume-driven cruiser rather than a featherweight racer. The builder explained that extensive customization in hull number one did add significant weight; in subsequent models, molded modules resulted in a lighter vessel. Hardware on the test boat was carefully installed, and excellent attention to detail could be found in the way wiring and plumbing was run throughout the boat.
Rig and Handling
The Admiral 40 carries a large-main, small-jib sail plan that testers found easy to handle, with an efficient traveler system benefiting mainsail trim. A large expanse of trampoline fills the span between the hulls, and on deck a targa arch makes a striking visual statement while supporting a hard bimini over the cockpit's spacious seating and elevating the mainsheet clear of the aft deck walkway. With its small keels rather than daggerboards, the boat is a little less capable on the wind, trading upwind bite for the shallow 3-foot-9-inch draft that makes anchorages accessible.
Under power, the twin 29-horsepower Yanmar saildrives delivered 6.4 knots at 2,500 rpm and a blistering 8.4 knots with the throttle wide open, according to the period test. The handling gear for the ground tackle was rated first-rate, and the electrical and mechanical installation was a cut above the fray.
Accommodations
The standard layout packs four double-berth cabins, two heads, and a large saloon into the 40-foot cat, while an owners' version substitutes three sleeping cabins with higher specs for fit and finish. Both arrangements place queen-size doubles athwartships in the aft cabins. The galley is up, giving the cook a view outward and equal social footing with the crew — a layout that suits liveaboard and charter use alike. Tankage supports extended cruising with roughly 105 gallons each for fuel and water.
Known Issues
The principal service-era concern is stern drag under load: Cruising World's Boat of the Year tests showed the stern dragging from displacement and payload, and the builder acknowledged that hull number one's extensive customization added significant weight before molded modules lightened later boats. This is a design-characteristic issue rather than a structural defect, but a buyer should understand that loaded cruising trim will sit the transom lower than an empty showboat.
Refits and Ownership
The Admiral 40's construction lends itself to owner customization, as the builder's own account of hull one's bespoke weight demonstrates. The careful installation of hardware and the clean runs of wiring and plumbing suggest that later upgrades — additional solar, watermakers, or revised accommodation joinery — can be executed without fighting the original build. The 4.2-kilowatt genset and twin Yanmar saildrives form a serviceable propulsion and power base for liveaboard refit programs.
The Verdict
The Admiral 40 is a thoughtfully built, high-volume cruising cat that prioritizes liveaboard space and shallow-water access over raw upwind performance. Its construction detail and systems integration were praised by period reviewers, and the layout flexibility between charter and owners' versions broadens its appeal. The trade-off is a boat that sits heavily when loaded and gives up some windward ability to its small keels.
Pros
- Hand-laid FRP with vacuum-bagged balsa core and careful hardware installation
- Four-cabin or three-cabin owners' layouts with athwartship queen aft berths
- Up galley and large saloon for liveaboard social use
- Twin 29-hp Yanmar saildrives with strong wide-open speed and a 4.2-kW genset
- Shallow 3'9" draft from twin keels
Cons
- Stern drags under displacement and payload load
- Small keels make it less capable on the wind than daggerboard cats
- Hull one's customization added notable weight before molded modules appeared



