The Westerly Oceanlord 41 Sailboat
Specs & Key Performance Indicators

The Westerly Oceanlord 41, a masthead sloop, was designed by Ed Dubois & Mike Parham and built in the UK by Westerly Yachts Ltd.

'Badgers Sett', a Westerly Oceanlord 41 sailboatA Westerly Oceanlord 41 making good progress to windward

Published Specification for the Westerly Oceanlord 41

Underwater Profile: Fin keel with spade rudder;

Hull Material: GRP (Fiberglass);

Length Overall: 40'6" (12.3m);

Waterline Length: 35'3" (10.7m);

Beam: 13'6" (4.1m);

Draft: 5'6" (1.7m);

Rig Type: Masthead Sloop;

Displacement: 20,878lb (9,470kg);

Designer: Ed Dubois, Mike Parham;

Builder:  Westerly Yachts Ltd (UK);

Year First Built: 1990;

Number Built: 100

Owners Association: Westerly Owners Association.

'Tiggerr', a Westerly Oceanlord 41 for Sale

Location: Grenada, West Indies

Asking Price: $30,000

Published Design Ratios for the Westerly Oceanlord 41

1. Sail Area/Displacement Ratio: 14.9

  • Less than 16 would be considered under-powered;
  • 16 to 20 would indicate reasonably good performance;
  • Over 20 suggests relatively high performance.

2. Ballast/Displacement Ratio: not published

  • Under 40: less stiff, less powerful
  • Over 40: stiffer, more powerful

3. Displacement/Length Ratio: 213

  • Under 100: Ultralight
  • 100 to 200: Light
  • 200 to 275: Moderate
  • 275 to 350: Heavy
  • Over 350: Ultraheavy

4. Comfort Ratio: 27.4

  • Under 20 indicates a lightweight racing boat
  • 20 to 30 indicates a coastal cruiser
  • 30 to 40 indicates a moderate offshore cruising boat
  • 40 to 50 indicates a heavy offshore boat
  • Over 50 indicates an extremely heavy offshore boat

5. Capsize Screening Formula: 1.9

  • Under 2.0 (the lower the better): Better suited for ocean passages
  • Over 2.0: Less suited for ocean passages

read more about these Key Performance Indicators...

Summary Analysis of the Design Ratios for the Westerly Oceanlord 41

1. A Sail Area/Displacement Ratio of just 14.9 suggests that the Westerly Oceanlord 41 will need a stiff breeze to get her going. In light conditions, unless you've got plenty of time on your hands, motor-sailing may be the way to go.

2. The Ballast/Displacement Ratio of the Westerly Oceanlord 41 doesn't appear to have been published. If you are able to provide it, please contact us.

3. A Displacement/Length Ratio of 213, tells us the Westerly Oceanlord 41 is a moderate displacement cruiser, which means she'll carry all your cruising gear without it having a dramatic effect on her performance. Most of today's sailboats intended for offshore cruising fall into this displacement category.

4. Ted Brewer's Comfort Ratio of 27.4 suggests that crew comfort of a Westerly Oceanlord 41 in a seaway is similar to what you would associate with the motion of a coastal cruiser with moderate stability, which is not encouraging news for anyone prone to seasickness. 

5. The Capsize Screening Formula (CSF) of 1.9 tells us that a Westerly Oceanlord 41 would be a safer choice of sailboat for an ocean passage than one with a CSF of more than 2.0. 

Other sailboats in the Westerly range include:


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