San Juan 21 - Specifications
If you are looking for a good value for one-design racing, day-sailing, or gunk-holing", check out the San Juan 21!
All San Juan 21's share the same hull but there were three basic deck designs. The Mark II fore deck is flat sloping forward vs. the Mk I which has a hump over the cabin and step-down profile to the foredeck. II's and III's differ mostly in the length of the cabin; a Mark III cabin is about 4 inches longer than a Mark II.t around 1400lbs dry, the boats are easy to trail. Some of the MkI's seem to weigh in about 100 lbs lighter than most MkII's. There are many different interiors to SJ21's, with the only common denominator being bulkheads port and starboard to which the chain plates fasten. SJ21's have the standard V berth and two quarter berths. On the starboard side is a low platform for the porta-potti.
The going prices for these boats are $1500 to $4500 based on condition.
These simple boats require little ongoing investment. The boats were well built - balsa cored deck for example - and much better built than competing boats from the 1970's and 80's such as Macgregor 21's, Mirage 5.5's, O'Day 22's etc. Parts needed for the basic San Juan can often be bought from hardware or agricultural supply stores. Most other hardware can be bought off the shelf from West Marine or your local chandlery. The specialized items are avail through Fred Rehm. He is active with the fleet and always advertises in the class news letter. There are several local sail makers that make GREAT SAILS for the San Juan. Mark Weinheimer, an active Fleet 8 member who works out of the Oriental NC loft of Banks Sails, is one source for new and used suits. Also the big names like north and UK know the measurements.
| Capsize Ratio | 2.45 |
| Hull Speed | 5.5 |
| Sail Area/Displacement | 23.2 |
| Displacement To LWL | 136 |
| Length Water Line/Beam | 2.429 |
| Motion Comfort | 9.55 |
| Length overall: | 20 ft 6 in |
| Length on waterline | 17 ft 0 in |
| Beam | 7 ft |
| Fractional (7/8) rig | |
| Sail area (main and 100%) | 190 sq ft (Class genoa is a 130%; in PHRF or cruising most people also have a 155%) |
| Spinnaker: | 284 sq ft (estimate from dimensions) |
| Mast height: | 25 ft 8 in. (Mark II & III) (25' 0", Mk I) |
| Draft (keel down) | 4 ft 0 in |
| Draft (keel up) | 1 ft 0 in |
| Displ (class minimum): | 1400 lb |
| Keel weight: | 420 lb |
| PHRF Rating: | 252 sec/mile (w/spinnaker) 264 sec/mile (working sails) |
| Number built | approximately 2,700 |
| I | 22.5 |
| P | 23.00 |
| J | 8.00 |
| E | 8.75 |
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