1961 — 1965
Designer
Sparkman & Stephens
Builder
Columbia Yachts
Associations
?
# Built
?
Hull
Monohull
Keel
Long
Rudder
?
Construction
FG (solid laminate)

Dimensions

Length Overall
28 6 / 8.7 m
Waterline Length
22 6 / 6.9 m
Beam
8 0 / 2.4 m
Draft
4 0 / 1.2 m
Displacement
7,400 lb / 3,357 kg
Ballast
3,120 lb / 1,415 kg
Drawing of Columbia 29
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  • 10 / 17
    San Diego, CA, US
    1965 Columbia 29
    $6,000 USD
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    San Diego, CA, US
    1965 Columbia 29
    $6,000 USD
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    San Diego, CA, US
    1965 Columbia 29
    $6,000 USD
  • 13 / 17
    San Diego, CA, US
    1965 Columbia 29
    $6,000 USD
  • 14 / 17
    San Diego, CA, US
    1965 Columbia 29
    $6,000 USD
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    San Diego, CA, US
    1965 Columbia 29
    $6,000 USD
  • 16 / 17
    San Diego, CA, US
    1965 Columbia 29
    $6,000 USD
  • 17 / 17
    San Diego, CA, US
    1965 Columbia 29
    $6,000 USD

Rig and Sails

Type
Sloop
Reported Sail Area
388′² / 36.1 m²
Total Sail Area
387′² / 36 m²
Mainsail
Sail Area
207′² / 19.3 m²
P
29 11 / 9.1 m
E
13 10 / 4.2 m
Air Draft
?
Foresail
Sail Area
180′² / 16.7 m²
I
34 6 / 10.5 m
J
10 5 / 3.2 m
Forestay Length
36 0 / 11 m

Auxilary Power

Make
Universal
Model
Atomic 4
HP
?
Fuel Type
Gas
Fuel Capacity
12 gal / 45 l

Accomodations

Water Capacity
25 gal / 95 l
Holding Tank Capacity
?
Headroom
6 0 / 1.8 m
Cabins
?

Calculations

Hull Speed
6.7 kn
Classic: 6.36 kn

Hull Speed

The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.

Formula

Classic hull speed formula:

Hull Speed = 1.34 x √LWL

A more accurate formula devised by Dave Gerr in The Propeller Handbook replaces the Speed/Length ratio constant of 1.34 with a calculation based on the Displacement/Length ratio.

Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio.311
Hull Speed = Max Speed/Length ratio x √LWL

6.72 knots
Classic formula: 6.36 knots
Sail Area/Displacement
16.4
16-20: good performance

Sail Area / Displacement Ratio

A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.

Formula

SA/D = SA ÷ (D ÷ 64)2/3

  • SA: Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
  • D: Displacement in pounds.
16.35
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
42.2
>40: stiffer, more powerful

Ballast / Displacement Ratio

A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.

Formula

Ballast / Displacement * 100

42.15
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
289.8
275-350: heavy

Displacement / Length Ratio

A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.

Formula

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

  • D: Displacement of the boat in pounds.
  • LWL: Waterline length in feet
289.81
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
29.3
20-30: coastal cruiser

Comfort Ratio

This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.

Formula

Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)

  • D: Displacement of the boat in pounds
  • LWL: Waterline length in feet
  • LOA: Length overall in feet
  • Beam: Width of boat at the widest point in feet
29.27
<20: lightweight racing boat
20-30: coastal cruiser
30-40: moderate bluewater cruising boat
40-50: heavy bluewater boat
>50: extremely heavy bluewater boat
Capsize Screening
1.6
<2.0: better suited for ocean passages

Capsize Screening Formula

This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.

Formula

CSV = Beam ÷ ³√(D / 64)

  • Beam: Width of boat at the widest point in feet
  • D: Displacement of the boat in pounds
1.64
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

From BlueWaterBoats.org:

From the prestigious drawing board of the Sparkman and Stephens office, the Columbia 29 was introduced by the Glas Laminates Company of California who were producers of fiberglass camper tops, shower stalls and chemical toilets. The first hull was laid up in 1961 and introduced to the market the subsequent year. The Columbia 29 was successful enough for the company to form Columbia Yachts Corporation and adopt the Columbia name for its entire line of subsequent boats, the company eventually became the highest volume producer of fiberglass yachts by 1967.

Primarily designed for coastal cruising the Columbia 29 is easy to sail and has reasonable comfort for its size. The boat has sleek lines and good performance for her era.

According to the sales material of the time, the boat can sleep 6 (at a pinch) having two quarter berths, a forepeak double, and a convertible dinette. The boat came standard powered by an outboard motor operating within a cockpit well, there was an inboard 8hp Atomic 4 gasoline engine as an alternative option. Early models had 3120 pounds of ballast which got bumped up to 4,100 pounds in later models before the introduction of the MkII. In total 304 MkI hulls were built between 1961 and 1967.

The boat appears in Atom Voyages list of proven boats for offshore voyaging so we’ve included it here. We’ve heard that construction quality was good through to the end of 1967 where quality started to decline. Most of the tabbing was glassed over marine ply which becomes saturated over time.

MkII

By 1967 a MkII version was introduced which shared the same hull, rig and sail plan as its predecessor, but a redesigned trunk cabin to keep it cosmetically inline with the rest of Columbia range of sailboats.The new cabin featured a one-piece fiberglass headliner. They also retained the extra 1,000 lbs of ballast which was added to the late MkI models. A total of 383 MkII hulls were produced between 1967 and 1969.

Defender 29

A raised deck version was built as the Defender 29, which offered more interior room and a flush deck. Though some may cite higher freeboard at first glance as a disadvantage, the overall windage when compared the equivalent Columbia 29 cabin profile is actually reduced.

Links and Further Reading

» Columbia 29 specifications and details at the Columbia Yachts Owners Association
» Columbia Yachts Yahoo Group, information and owner discussions.
» Heart of Glass: Fiberglass Boats and the Men Who Built Them by Daniel Spurr, a short history of Columbia Yachts (p182)

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