Sailboat Specifications
Hull Type:
Long Keel
Rigging Type:
Masthead Sloop
LOA:
28.50 ft / 8.69 m
LWL:
22.50 ft / 6.86 m
Beam:
8.00 ft / 2.44 m
S.A. (reported):
388.00 ft2 / 36.05 m2
Draft (max):
4.00 ft / 1.22 m
Displacement:
7,400 lb / 3,357 kg
Ballast:
3,120 lb / 1,415 kg
S.A./Disp.:
16.40
Bal./Disp.:
42.16
Disp./Len.:
290.03
Construction:
FG (solid laminate)
First Built:
1961
Last Built:
1965
Builder:
Columbia Yachts (USA)
Designer:
Sparkman & Stephens
Auxiliary Power/Tanks (orig. equip.)
Make:
Universal
Model:
Atomic 4
Type:
Gas
Sailboat Calculations
S.A./Disp.:
16.40
Bal./Disp.:
42.16
Disp./Len.:
290.03
Comfort Ratio:
29.49
Capsize Screening Formula:
1.64
S#:
1.77
Rig and Sail Particulars
I:
34.50 ft / 10.52 m
J:
10.42 ft / 3.18 m
P:
30.00 ft / 9.14 m
E:
13.83 ft / 4.22 m
S.A. Fore:
179.75 ft2 / 16.70 m2
S.A. Main:
207.45 ft2 / 19.27 m2
S.A. Total (100% Fore + Main Triangles)
387.20 ft2 / 35.97 m2
S.A./Disp. (calc.):
16.37
Est. Forestay Len.:
36.04 ft / 10.98 m
Accommodations
Water:
25 gals / 95 L
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Notes
(S&S #1501)The original mold and first hulls (1-4?) were built, almost singlehandedly by Larry Waters. (1960?).The person financing the project apparently lost interest and the tooling ended up in the hands of Glas Laminates, (later Columbia Yachts). It became one of their signature models.A raised deck version was introduced in 1963 called the COLUMBIA 29 DEFENDER.In 1965 there was a styling change with a new more streamlined deck and coach roof. (COLUMBIA 29 MKII).Delivered with outboard well or optional gas inboard engine.
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