San Juan 21 Explained

San Juan 21-2
Image Boat:File:San Juan 21 sailboat Iris 3793.jpg
Image Caption:San Juan 21-2
Designer:Don Clark
Location:United States
Year:1970
No Built:2600 (all models)
Builder:Clark Boat Company
Role:cruiser-racer
Draft:4feet with centerboard down
Displacement:12500NaN0
Hull Type:Monohull
Construction:Fiberglass
Loa:20.5feet
Lwl:17.5feet
Beam:7feet
Engine:Outboard motor
Keel Type:centerboard
Ballast:4000NaN0
Rudder Type:transom-mounted rudder
Rig Type:Bermuda rig
I:22.5feet
J:8.21feet
P:23feet
E:8.75feet
Sailplan:Fractional rigged sloop
Sailarea Main:100.63square feet
Sailarea Headsail:92.36square feet
Sailarea Total:192.99square feet
Phrf:252 (average)

The San Juan 21 is an American trailerable sailboat, that was designed by Don Clark as a cruiser-racer[1] and first built in 1970.[2] [3] [4]

Production

The design was built by the Clark Boat Company in Kent, Washington, United States, as well as eventually opening a facility in New Bern, North Carolina, but it is now out of production. A total of 2600 San Juan 21s were completed.[1] [5] [2] [6]

The design was introduced at the 1970 Seattle Boat Show and was well received.[6]

Design

The San Juan 21 is a recreational keelboat, built predominantly of fiberglass with a balsa-cored cabin and wood trim. It has a fractional sloop rig, a raked stem, a slightly reverse transom, a transom-hung rudder controlled by a tiller and a centerboard keel.[2] [3]

The boat has a draft of 4feet with the centerboard extended and 1feet with it retracted, allowing beaching or ground transportation on a trailer.[2]

The boat is normally fitted with a small 2to outboard motor for docking and maneuvering with racing oriented owners preferring lighter weight outboards as the boat is sensitive to weight astern.[2] [4] [7]

The design has sleeping accommodation for four people, with a double "V"-berth in the bow cabin and two quarter berths in the main cabin under the cockpit. The head is located just aft of the bow cabin on the starboard side. Cabin headroom is 420NaN0.[4]

For sailing downwind the design may be equipped with a symmetrical spinnaker.[2]

The design has a hull speed of 5.522NaN2.[8] [9]

Variants

San Juan 21 or Mark I

This model was introduced in 1970 and produced until 1977. It has a length overall of 20.51NaN1, a waterline length of 17.51NaN1, the design displacement was 12500NaN0, but production displacement turned out to be 14000NaN0. It carries 4000NaN0 of ballast. The boat has a PHRF racing average handicap of 252 with a high of 246 and low of 258.

San Juan 21-2 or Mark II

This model was introduced in 1974 after about 1,000 of the Mark Is had been built. The Mark II has a raised deck over top of the cabin and has a smaller cockpit, with a commensurately larger cabin. The Mark II was produced alongside the Mark I until Mark I production ended in 1977. It has a length overall of 20.51NaN1, a waterline length of 17.51NaN1, displaces 12500NaN0 and carries 4000NaN0 of ballast. The boat has a PHRF racing average handicap of 252 with a high of 267 and low of 240.

San Juan Mark III

This model was the last update and uses the same Cabin top and Hull as the Mark II but, has a different pan arrangement inside the cabin as well as removal of the aft mounted lazarette on boats produced on the east coast, while west coast boats retained the lazarette.:

Operational history

The boat is supported by an active class club that organizes racing events, the San Juan 21 Class Association .[10]

In a 2010 review Steve Henkel wrote, "the SJ21 has a very active racing association, unusual for a boat designed 30-plus years ago. An efficient foil-shaped rudder and swing keel, plus a sailcloth slot gasket, offer superior hydrodynamics compared with her comps. Worst features: The slot gasket, made of sailcloth (which bridges the gap across the trunk slot to prevent turbulence when sailing downwind with the keel raised), requires special maintenance (trimming of frayed edges and periodic replacement) to keep it smooth and effective. The advertised weight of 1,250 pounds may be low; some owners claim weights of 1,500 to 1,750 pounds."[4]

See also

Similar sailboats

Notes and References

  1. Web site: Robinson . Mike . San Juan Sailboats and Clark Boat Company - PDF re printed from "Good Old Boat" magazine by permission . Official San Juan 21 Class association. https://web.archive.org/web/20221230074434/http://sj21class.org/pdf/clark_boat.pdf. 30 December 2022. live.
  2. Web site: San Juan 21 sailboat specifications and details. 17 December 2021. Browning. Randy . sailboatdata.com. 2021 . https://archive.today/20211217175058/https://sailboatdata.com/sailboat/san-juan-21. 17 December 2021. live.
  3. Web site: San Juan 21-2 sailboat specifications and details. 17 December 2021. Browning. Randy . sailboatdata.com. 2018 . https://archive.today/20211217175217/https://sailboatdata.com/sailboat/san-juan-21-2. 17 December 2021. live.
  4. Henkel, Steve: The Sailor's Book of Small Cruising Sailboats, pages 129-130. International Marine/McGraw-Hill, 2010.
  5. Web site: Jensen . Stephen . PGS Juan . San Juan 21 Fleet 1 Official Fleet Website. https://archive.today/20230405113100/https://sites.google.com/site/sanjuan21fleet1/boats-of-fleet-1/pgs-juan. 5 April 2023. live.
  6. Web site: Clark Boat Company 1960-1984 . 17 December 2021. Browning. Randy . sailboatdata.com. 2021 . https://archive.today/20201002224359/https://sailboatdata.com/builder/clark-boat-company. 2 October 2020. live.
  7. Web site: Jensen . Stephen . Outboards . San Juan 21 Fleet 1 - Official Website. https://archive.today/20230405113102/https://sites.google.com/site/sanjuan21fleet1/rigging-ideas-tips/outboards. 5 April 2023. live.
  8. Web site: Sailboat Specifications for San Juan 21 . 28 September 2018. Sailing Joy. InterVisionSoft LLC. 2018 . https://web.archive.org/web/20180929041401/http://www.sailingjoy.com/sailboat_specs/sailboat_specs/view/41/san-juan-21. 29 September 2018. dead.
  9. Web site: Sailboat Specifications for San Juan 21 . 28 September 2018. Sailing Joy. InterVisionSoft LLC. 2018. https://web.archive.org/web/20180929041227/http://www.sailingjoy.com/sailboat_specs/sailboat_specs/view/42/san-juan-21-2. 29 September 2018. dead.
  10. Web site: San Juan 21 Class Association. 17 December 2021. McArthur. Bruce . sailboatdata.com. 2021. https://archive.today/20211217194510/https://sailboatdata.com/association/san-juan-21-class-association. 17 December 2021. live.