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Seller's Description

This meticulously maintained 1988 Olson 911SE, designed by the legendary George Olson, combines the innovative performance of a light-displacement racer with the comfort of a capable cruiser. Known for its exceptional upwind ability and balanced handling, the Olson 911SE has a storied history as a standout in both competitive racing and weekend cruising. With its LOA of 2911, beam of 104, and displacement of 8,680 lbs, this boat exemplifies the cutting-edge yacht design of its era while remaining highly relevant today.

A Legacy of Performance: The Olson 911SE was built to deliver speed and stability, featuring a finely tuned hull and rig that allows for efficient sailing in a variety of conditions. This vessel, kept on Lake Michigan since new, has been extensively upgraded and first launched in St. Augustine in December 2023 following a complete restoration.

Equipment: Visit www.allpointsyachtsales.com for more information and photos

Specs

Designer
Carl Schumacher
Builder
Ericson Yachts
Associations
?
# Built
?
Hull
Monohull
Keel
Fin
Rudder
Spade
Construction
FG

Dimensions

Length Overall
29 11 / 9.1 m
Waterline Length
25 0 / 7.6 m
Beam
10 5 / 3.2 m
Draft
5 8 / 1.7 m
Displacement
8,100 lb / 3,674 kg
Ballast
3,200 lb / 1,451 kg

Rig and Sails

Type
Sloop
Reported Sail Area
472′² / 43.9 m²
Total Sail Area
473′² / 43.9 m²
Mainsail
Sail Area
214′² / 19.9 m²
P
35 11 / 11 m
E
11 10 / 3.6 m
Air Draft
?
Foresail
Sail Area
258′² / 24 m²
I
41 11 / 12.8 m
J
12 3 / 3.8 m
Forestay Length
43 9 / 13.3 m

Auxilary Power

Make
?
Model
?
HP
?
Fuel Type
?
Fuel Capacity
?
Engine Hours
?

Accomodations

Water Capacity
?
Holding Tank Capacity
?
Headroom
?
Cabins
1

Calculations

Hull Speed
7.6 kn
Classic: 6.7 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

7.6 knots
Classic formula: 6.7 knots
Sail Area/Displacement
18.7
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.
18.73
<16: under powered
16-20: good performance
>20: high performance
Ballast/Displacement
39.5
<40: less stiff, less 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

39.49
<40: less stiff, less powerful
>40: stiffer, more powerful
Displacement/Length
231.4
200-300: moderate

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
231.42
<100: ultralight
100-200: light
200-300: moderate
300-400: heavy
>400: very heavy
Comfort Ratio
20.9
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
20.92
<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
2.1
>2.0: better suited for coastal cruising

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
2.06
<2: better suited for ocean passages
>2: better suited for coastal cruising

Notes

Molds for this yacht were acquired from Pacific Boat Works.
Boats built by Ericson where built using a heavier layup schedule (with less or no core), which accounts for the greater displacement shown here.

This listing is presented by SailboatListings.com. Visit their website for more information or to contact the seller.

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