Glen L 30
Description
The Glen L 30 (also known as the Glen-L 30 or Yankee One-Design), a sleek fiberglass one-design racer-cruiser penned by Glen L. Witt in 1962 for his Glen-L Marine Designs catalog, embodies the firm's ethos of empowering amateur builders with high-performance sailboats that blend classic lines, modern materials, and offshore capability in a trailerable package. Measuring 30 feet LOA with a 24-foot waterline, 9-foot beam, and 4 feet 6 inches draft on a fin keel with spade rudder (displacement 6,800 pounds, 40% ballast ratio for excellent stiffness and a comfort ratio ~22), it features a masthead sloop rig with 420 square feet of sail (SA/D ratio 18.5 for lively acceleration, hull speed 6.6 knots), delivering 7–9 knot reaches in 12–18 knots while remaining forgiving for club racing or coastal passages. Designed for stitch-and-glue plywood/epoxy or cold-molded wood construction (with fiberglass sheathing options), it includes full plans for a spacious interior: 6'2" headroom, V-berth forward, U-shaped galley with sink and stove, enclosed head with shower, nav station, and quarter berths sleeping six—ideal for weeklong family cruises on the Great Lakes or Pacific Northwest. Powered by an inboard diesel (15–25 hp Yanmar or Volvo) or optional outboard, it motors at 6 knots; builders praise its balanced helm, dry deck, and minimal maintenance, with many completing Transpac qualifiers or East Coast deliveries. Over 150 sets of plans sold since introduction, fostering scattered one-design fleets and custom builds (some professional yards offered turnkey versions in the 1970s–1980s).
The standard boat dimensions
| i | 41 ft |
|---|---|
| j | 12.67 ft |
| p | 37.67 ft |
| e | 12.25 ft |
| p2 | - |
| e2 | - |
| i2 | - |
| j2 | - |
| I | J | P | E | P2 | E2 | I2 | J2 |
|---|---|---|---|---|---|---|---|
| 41 ft | 12.67 ft | 37.67 ft | 12.25 ft | - | - | - | - |
Sails
Glen L 30 - MAINSAIL
| Luff | * 37.67 ft - (11482 mm) |
|---|---|
| Foot | * 12.25 ft - (3734 mm) |
| Leech | * 38.96 ft - (11875 mm) |
| Tack Angle | * 88 ° |
| Diagonal | * 39.2 ft - (11948 mm) |
| Head (inches) | * 5.25 in - (133 mm) |
| Area | * 237.74 ft² |
| Edit in Calculator | |
Glen L 30 - JIBSAIL
| Luff | * 34.33 ft - (10464 mm) |
|---|---|
| Foot | * 16.69 ft - (5087 mm) |
| Leech | * 29.97 ft - (9135 mm) |
| Percentage LP | * 115 % |
| Length Perpendicular | * 14.57 ft - (4441 mm) |
| Deck Angle | * 12.02 ° |
| Area | * 250.1 ft² |
| Edit in Calculator | |
Glen L 30 - JIBSAIL
| Luff | 31 ft - (9449 mm) |
|---|---|
| Foot | 15 ft - (4572 mm) |
| Leech | 28 ft - (8534 mm) |
| Percentage LP | * 106.79 % |
| Length Perpendicular | * 13.53 ft - (4124 mm) |
| Deck Angle | * 8.44 ° |
| Area | * 209.66 ft² |
| Edit in Calculator | |
Glen L 30 - GENOA
| Luff | * 40.77 ft - (12427 mm) |
|---|---|
| Foot | * 20.38 ft - (6212 mm) |
| Leech | * 38.42 ft - (11710 mm) |
| Percentage LP | * 149.96 % |
| Length Perpendicular | * 19 ft - (5791 mm) |
| Deck Angle | * 4.05 ° |
| Area | * 387.28 ft² |
| Edit in Calculator | |
Glen L 30 - GENOA
| Luff | 38 ft - (11582 mm) |
|---|---|
| Foot | 17.5 ft - (5334 mm) |
| Leech | 34.42 ft - (10491 mm) |
| Percentage LP | * 125.02 % |
| Length Perpendicular | * 15.84 ft - (4828 mm) |
| Deck Angle | * 7.99 ° |
| Area | * 300.95 ft² |
| Edit in Calculator | |
Glen L 30 - ASYMMETRICAL
| Luff | * 40.77 ft - (12427 mm) |
|---|---|
| Foot | * 20.91 ft - (6373 mm) |
| Leech | * 37.51 ft - (11433 mm) |
| Perc LP | * 165 % |
| Area | * 639 ft² |
| Edit in Calculator | |
Disclaimer. Boats are not all the same -- even when produced in the same factory of the same model. Sailrite does its best to publish accurate dimensions, but we often find it worthwhile to have our customers measure their boats carefully before we produce kits for them. You should take the same precautions, especially when the data is not from Sailrite. The information on this site is not guaranteed to be accurate. Sailrite offers this content as a service to our community, but takes no responsibility for the reliability of the data provided.