Beta Marine

Beta Marine

Sailboat Specifications

Hull Type: Lifting Keel
Rigging Type: Fractional Sloop
LOA: 21.00 ft
LWL: 16.50 ft
S.A. (reported): 202.00 ft²
Beam: 8.00 ft
Displacement: 1,800.00 lb
Ballast: 750.00 lb
Max Draft: 4.50 ft
Min Draft: 0.84 ft
Construction: FG
Ballast Type: Lead
First Built: 1980
Builder: Irwin Yachts (USA)
Designer: Ted Irwin

KLSC Leaderboard

KLSC Leaderboard

Sailboat Calculations

S.A. / Displ.: 21.89
Bal. / Displ.: 41.67
Disp: / Len: 178.88
Comfort Ratio: 9.76
Capsize Screening Formula: 2.63
S#: 3.55
Hull Speed: 5.44 kn
Pounds/Inch Immersion: 471.65 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

I: 24.00 ft
J: 8.00 ft
P: 24.50 ft
E: 8.60 ft
S.A. Fore: 96.00 ft²
S.A. Main: 105.35 ft²
S.A. Total (100% Fore + Main Triangles): 201.35 ft²
S.A./Displ. (calc.): 21.82
Est. Forestay Length: 25.30 ft

Sailboat Links

Designers: Ted Irwin
Builders: Irwin Yachts
Associations: Irwin Facebook Group
Irwin Yacht Owners
Related Sailboats: IRWIN MINI-TON
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The FREE SPIRIT is similar to the IRWIN MINI-TON but with a smaller rig.