Beta Marine

Beta Marine

Sailboat Specifications

Definitions
Hull Type: Centerboard Dinghy
Rigging Type: Fractional Sloop
LOA: 14.00 ft / 4.27 m
LWL: 13.75 ft / 4.19 m
S.A. (reported): 100.00 ft² / 9.29 m²
Beam: 4.38 ft / 1.34 m
Displacement: 220.00 lb / 100 kg
Max Draft: 2.08 ft / 0.63 m
Min Draft: 0.33 ft / 0.10 m
Construction: Plywood/FG
First Built: 1946
Designer: Herbert McWilliams

Sailboat Calculations

Definitions
S.A. / Displ.: 43.94
Disp: / Len: 37.78
Comfort Ratio: 3.43
Capsize Screening Formula: 2.90
Hull Speed: 4.97 kn
Pounds/Inch Immersion: 215.19 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

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Notes

At one time the largest dinghy class in South Africa. Designed for home builder using plywood. Until 2006 the SPROG was the one design dinghy sailed at all South African University championships.
The reported SA above is based on the information in the drawing. We have also seen a reported SA of 8.3 m² / 89 sqft.