San Juan 21 Sail Data

# X-SD-5303

Sailboat Description

The San Juan 21 was designed by Don Clark with a completely retracting keel, balsa cored deck.  There are two versions of the San Juan 21 a MK I and MK II both have the same sail plan. The MK II has a flush deck with a longer more spacious cabin.
LOA 20'6"
LWL 17'6"
Beam 7'
Draft board down 4', Up 8"
1250 lbs. weight
400 lbs. keel weight

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Boat Specifications

Length20.5 ft
Builder/DesignerDon Clark
Source of DataClass Rules

Rig Dimensions

I
22.5ft
(6858mm)
J
8ft
(2438mm)
P
23ft
(7010mm)
E
8.75ft
(2667mm)
I2/P2
n/a
J2/E2
n/a

Sail Data

Asymmetrical

Luff22.69*ft
Foot13.2*ft
Leech20.87*ft
Headn/a
Clew-Throatn/a
Stayn/a
Commentsn/a

Drifter

Luff22.69*ft
Foot13.66*ft
Leech20.13*ft
Headn/a
Clew-Throatn/a
Stayn/a
Commentsn/a

Genoa

Luff22.25ft
Foot12.167ft
Leech20.5ft
Headn/a
Clew-Throatn/a
Stayn/a
Commentsn/a

Genoa

Luff22.69*ft
Foot15.02*ft
Leech21.19*ft
Headn/a
Clew-Throatn/a
Stayn/a
Commentsn/a

Jibsail

Luff20ft
Foot9ft
Leech18.25ft
Headn/a
Clew-Throatn/a
Stayn/a
Commentsn/a

Mainsail

Luff23ft
Foot8.75ft
Leech24.5ft
Head0.38ft
Clew-Throatn/a
Stayn/a
Commentsn/a

Spinnaker

Luffn/a
Foot13.83ft
Leechn/a
Headn/a
Clew-Throatn/a
Stay22.69*ft
Commentsn/a

*A computer algorithm was used to determine this figure based on partial data (usually the I, J, E, and P). These data points should be carefully checked. More Details >

Please Note: Most of our sail dimensions are based on class rules, designer blueprints, or measurements of sails. These dimensions are intended as starting points only. Sailboats are not all uniform, even from the same designer. We recommend carefully measuring your boat if you are uncertain about dimensions.

All dimensions are intended to be maximum and smaller sails are not wrong.

We've limited our listing to the sails most commonly used, but these are not the only ones appropriate for a given boat.