Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Twin Keel
Rigging Type: Gunter
LOA: 17.00 ft / 5.18 m
LWL: 16.60 ft / 5.06 m
S.A. (reported): 123.00 ft² / 11.43 m²
Beam: 6.50 ft / 1.98 m
Displacement: 790.00 lb / 358 kg
Ballast: 112.00 lb / 51 kg
Max Draft: 2.50 ft / 0.76 m
Construction: Plywood/FG
First Built: 1963
Builder: Amateur built to plans/Febris Marine
Designer: Percy Blandford

KLSC Leaderboard

KLSC Leaderboard

Sailboat Calculations

S.A. / Displ.: 23.07
Bal. / Displ.: 14.18
Disp: / Len: 77.10
Comfort Ratio: 6.03
Capsize Screening Formula: 2.81
Hull Speed: 5.46 kn
Pounds/Inch Immersion: 385.54 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Sailboat Links

Designers: Percy Blandford
Associations: Lysander Owners Assoc.
Download Boat Record:


The LYSANDER trailer-sailer was designed specifically for home construction by the amateur using marine ply panels laid on frames. The standard boat is 17'(5.18m) long though many 'stretched' 19' (5.8m) versions have been built. The original design was gunter rigged to facilitate trailing but over the years Bermudan, cutter, gaff and even junk rig variants have been used. Some later boats were built of fiberglass (by Febris Marine UK). Plans for the home builder are still available through the class association.