Beta Marine

Sailboat Specifications

Hull Type: Centerboard Dinghy
Rigging Type: Fractional Sloop
LOA: 15.00 ft / 4.57 m
LWL: 14.00 ft / 4.27 m
S.A. (reported): 144.00 ft² / 13.38 m²
Beam: 5.50 ft / 1.68 m
Displacement: 385.00 lb / 175 kg
Max Draft: 3.67 ft / 1.12 m
Min Draft: 0.58 ft / 0.18 m
Construction: FG
First Built: 1960
Last Built: 1982
Builder: Leon F. Irish Co. (USA)
Designer: F. S. Ford

Sailboat Calculations

S.A. / Displ.: 43.59
Disp: / Len: 62.64
Comfort Ratio: 4.29
Capsize Screening Formula: 3.03
Hull Speed: 5.01 kn
Pounds/Inch Immersion: 275.13 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Sailboat Links

Designers: F. S. Ford Jr.
Download Boat Record:


First built by Sail-Mor Boat Co. of Royal Oak MI. (USA).
The rights were sold to Leon F. Irish Co. of Walled Lake, MI (USA) some time in the early 1960's.
Spin area: 130 sq ft
Thanks to George Eheman, who commissioned the design and was the original builder of the CHALLENGER 15.