Beta Marine

Beta Marine

Sailboat Specifications

Definitions
Hull Type: Fin with rudder on skeg
Rigging Type: Masthead Sloop
LOA: 28.00 ft / 8.53 m
LWL: 22.50 ft / 6.86 m
S.A. (reported): 397.00 ft² / 36.88 m²
Beam: 8.00 ft / 2.44 m
Displacement: 7,900.00 lb / 3,583 kg
Ballast: 3,000.00 lb / 1,361 kg
Max Draft: 4.50 ft / 1.37 m
Construction: FG
Ballast Type: Lead
First Built: 1970
Builder: Irwin Yachts (USA)
Designer: Ted Irwin

Auxiliary Power/Tanks (orig. equip.)

Make: Universal
Model: Atomic 4
Type: Gas
Fuel: 24 gals / 91 L

Accomodations

Water: 25 gals / 95 L

Sailboat Calculations

Definitions
S.A. / Displ.: 16.07
Bal. / Displ.: 37.97
Disp: / Len: 309.62
Comfort Ratio: 31.67
Capsize Screening Formula: 1.61
S#: 1.60
Hull Speed: 6.36 kn
Pounds/Inch Immersion: 643.16 pounds/inch

calculation mobile

2 nd ad half width

3rd ad full width

Rig and Sail Particulars

HELP
I: 35.50 ft / 10.82 m
J: 11.50 ft / 3.51 m
P: 31.30 ft / 9.54 m
E: 12.30 ft / 3.75 m
S.A. Fore: 204.13 ft² / 18.96 m²
S.A. Main: 192.50 ft² / 17.88 m²
S.A. Total (100% Fore + Main Triangles): 396.63 ft² / 36.85 m²
S.A./Displ. (calc.): 16.05
Est. Forestay Length: 37.32 ft / 11.38 m

Sailboat Links

Designers: Ted Irwin
Builders: Irwin Yachts
Associations: Irwin Facebook Group
Irwin Yacht Owners
Related Sailboats: IRWIN 28 MK IV
Download Boat Record:

Notes

One of Irwin's more popular models that underwent a number of changes over a long production run.
Also available with a keel/cb.
Draft- BD:7.25'/BU:3.0'