The Moody 45 Classic Sailboat
Specs & Key Performance Indicators

The Moody 45 Classic, a light displacement fractional sloop, was designed by Bill Dixon and built in the UK by A. H. Moody & Sons Ltd.

A Moody 45 Classic sailboat under full sailA Moody 45 Classic

Published Specification for the Moody 45 Classic

Underwater Profile: Bulb fin L-shaped keel & spade rudder

Hull Material: GRP (Fibreglass)

Length Overall: 46'0" (14.0m)

Waterline Length: 40'0" (12.2m)

Beam: 13'9" (4.2m)

Draft: 7'3" (2.3m)

Rig Type: Fractional sloop

Displacement: 25,353lb (11,500kg)

Ballast: 7,319lb (3,320kg)

Designer: Bill Dixon

Builder: A. H. Moody & Sons Ltd (UK)

Year First Built: 2010

Moody 45 Classic interiorDeck layout and interior options for the Moody 45 Classic


Read more about the latest sailboats in the Moody range...


Published Design Ratios for the Moody 45 Classic

1. Sail Area/Displacement Ratio: 24.7

  • 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: 28.9

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

3. Displacement/Length Ratio: 176

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

4. Comfort Ratio: 28.5

  • 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 Moody 45 Classic

1. A Sail Area/Displacement Ratio of 24.7 suggests that, in the right hands, the Moody 45 Classic will have enough performance to leave most other sailboats of similar waterline length well astern. 

2. A Ballast/Displacement Ratio of 28.9 would usually mean that the Moody 45 Classic would have a tendency to heel uncomfortably in a gust, and need to be reefed early to keep her sailing upright in a moderate breeze.

However, as she has much of her ballast concentrated in a bulb at the foot of her keel, she's likely to be considerably stiffer than her published Ballast/Displacement Ratio might suggest.

3. A Displacement/Length Ratio of 176 tells us the Moody 45 Classic is a light displacement sailboat. If she's loaded with too much heavy cruising gear her performance will suffer to a degree.

4. Ted Brewer's Comfort Ratio of 28.5 suggests that crew comfort of a Moody 45 Classic in a seaway is similar to what you would associate with the motion of a coastal cruiser with moderate stability, which is not the best of news for anyone prone to seasickness. 

5. The Capsize Screening Formula (CSF) of 1.9 indicates that a Moody 45 Classic 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 Moody range include:

A Moody 33S sailboat at anchorThe Moody 33S


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