The MG 335 Sailboat
Specs & Key Performance Indicators
The MG 335, a light displacement fractionally rigged cruiser, was designed by Tony Castro and built in the UK by Northshore Yachts.
An MG 335 Sailboat
Published Specification for the MG 335
Underwater Profile: Fin keel & spade rudder
Hull Material: GRP (Fibreglass)
Length Overall: 34'9" (10.6m)
Waterline Length: 26'8" (8.4m)
Beam: 11'3" (3.4m)
Draft: 6'3" (1.9m)
Rig Type: Fractional sloop
Displacement: 8,900lb (4,037kg)
Ballast: 3,800lb (1,724kg)
Designer: Tony Castro
Builder: Northshore Yachts (UK)
Year First Built: 1986
Year Last Built: 1994
Published Design Ratios for the MG 335
1. Sail Area/Displacement Ratio: 20.0
- 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: 42.7
- Under 40: less stiff, less powerful
- Over 40: stiffer, more powerful
3. Displacement/Length Ratio: 188
- Under 100: Ultralight
- 100 to 200: Light
- 200 to 275: Moderate
- 275 to 350: Heavy
- Over 350: Ultraheavy
4. Comfort Ratio: 18.4
- 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: 2.2
- 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 MG 335
1. A Sail Area/Displacement Ratio of 20.0 suggests that the MG 335 will, in the right conditions, approach her maximum hull speed readily and satisfy the sailing performance expectations of most cruising sailors.
2. A Ballast/Displacement Ratio of 42.7 means that the MG 335 will stand up well to her canvas in a blow, helping her to power through the waves.
3. A Displacement/Length Ratio of 188, tells us the MG 335 is clearly 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 18.4 suggests that the MG 335 will have the motion underway to that of a lightweight racing boat. Crew comfort will often be memorable for all the wrong reasons. Beating upwind in lively conditions the xxxxx will slam enough to shake your fillings out with a motion that most cruising sailors have no desire to get used to.
5. The Capsize Screening Formula of 2.2 tells us that a MG 335 would not be as good a choice of sailboat for ocean passage-making, owing to the increased risk of capsize in strong winds and heavy seas when compared to a sailboat with a CSF of less than 2.0.
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