An RS representative was careful to say the company doesn’t even call it a sport boat. The result feels more like a small keelboat than a dinghy, while still being quick to get onto the step.
Design and Construction
The RS 21 displaces 1,433 pounds, draws 4 feet 6 inches, and carries its 7-foot-3-inch beam well aft. Its chamfered bow and hard chines maximize waterline, while the low freeboard, reverse bow, and aft chine give it the unmistakable look of a modern design.
The open layout is the defining choice. There’s no cabin or doghouse of any kind; the cockpit is effectively the whole boat. Even so, a watertight hatch in the bow provides generous storage for crew bags and gear.
A large recessed hatch exposes the boat’s construction: a cored vinylester laminate with a recycled-plastic core that provides noticeable panel stiffness for its weight. Tom Rich described the laminate as not excessively thick but solid to the tap test. The builder also points out that a totaled hull can be ground up and reused in the next boat.
Ballast and Stability
Of the boat’s 1,433-pound displacement, 730 pounds is ballast, giving it a better-than-50-percent ballast-to-displacement ratio. That clearly suits the design’s purpose as a stable club platform.
Test sailors found the RS 21 amazingly stable at the dock. With four adults standing on one side deck, the boat barely heeled, and several testers noted that it feels more like a big boat than a dinghy. That steadiness supports RS’s description of the 21 as forgiving and makes it comfortable compared with sportier alternatives where legs-out hiking is the norm. Legs-out hiking isn’t allowed here, and the boat is sailed with three or four crew.
Rig, Controls, and Handling
The RS 21 has a fractional sloop rig with a Selden carbon mast and aluminum boom. Turnbuckles allow rapid tuning between races.
The hanked-on jib uses 2-to-1 leads on short transverse tracks with adjustment stops. Testers found that the athwartships-adjustable leads allowed the jib to be sheeted hard while maintaining a well-proportioned slot.
There’s no mainsheet traveler. Instead, a mid-cockpit pedestal houses the Torqeedo and mainsheet bar. The double-ended mainsheet can be trimmed from forward or aft, and its split arrangement allows a crewmember to take over from the helmsman. Sheeting from an aft, above-deck position lets the boom trim to nearly the centerline.
Both the jib and main halyards exit the mast into fine-tune purchases, allowing draft changes on the fly. The cunningham and vang are also reachable from the legs-in hiking position.
Greg Stewart found the helm balance “really nice” and said the boat never wants to wipe out. Allen noted that crew weight in the right place makes a huge difference to helm load upwind. When racing, the boat should be dead flat or carry only a touch of weather heel.
The RS 21 has a fine groove that lets the crew know when the boat is in it. Downwind, it’s easy when the leech-twist profiles match. Once on the step, it jumps with notably little bow wave and feels confidence-inspiring rather than on the edge. With four crew sailing downwind in chop, however, their weight needs to be as far aft as possible.
Cockpit and Crew Accommodation
The all-cockpit layout has elbow room for four or five people. Sailing World judged the ergonomics excellent for a boat this size, with beveled deck corners allowing the crew to sit comfortably upright against the lifelines.
The mid-cockpit pedestal arch doubles as a handhold, which testers called an exciting asset for sailors with balance or mobility challenges. A stainless-steel grab bar also gives the helmsman a secure balance point when crossing the boat.
At the bow, a foredeck cutout allows a less-than-nimble bowperson to move forward without fear of going overboard. The simple layout at the front of the boat should also be less intimidating for inexperienced crews.
Practical Issues
Testing revealed a couple of practical caveats. Digging a wave can send water through the cockpit rather than merely slowing the boat, so drainage and crew awareness matter in chop.
During jibes, the extra mainsheet occasionally caught on parts of the mid-cockpit pedestal. It’s a detail worth knowing for crews unfamiliar with the boat’s split-sheet system.
The Verdict
The RS 21 is a deliberately restrained one-design keelboat that works as a club racer and training platform without pretending to be a pure speed machine. Its open, all-cockpit layout, electric-drive stowage, and adjustable rig put serious sailing within reach of mixed-ability crews. Its stability and helm manners make it a confidence-inspiring place to learn or race hard. Against that breadth of thoughtful design, the few handling quirks are minor.
Pros
- Exceptional stability for a 21-foot keelboat, with the boat barely heeling when four adults stand on one side at the dock
- Forgiving, confidence-inspiring helm that doesn’t feel on the edge when planing
- Open, all-cockpit layout with bow storage and excellent ergonomics for four or five people
- Highly adjustable, easy-to-tune rig with fine draft control at the mast
- Simple systems and class restrictions that keep racing close and accessible
Cons
- No cabin shelter, and waves can send water through the open cockpit
- Mainsheet can catch on the mid-cockpit pedestal during jibes until crews learn the routing
- Legs-out hiking isn’t allowed, limiting the athletic, dinghy-style sailing some crews may expect
