Review of Moody 33 Mk II

The hull is made of hand laid fibreglass. Generally, a hull made of hand laid fibreglass requires only a minimum of maintenance during the sailing season.

The interior is like few other boats made in fibreglass.
The boat is equipped with 2 cabins, 6-7 berths, a galley and toilet facility.

Keel of Moody 33 Mk II anno 1980. Out on hard standage

Fin keel

The Moody 33 Mk II is equipped with a fin keel. A boat with a fin keel is more manoeuvrable but has less directional stability than a similar boat with a full keel.

The keel is made of iron. Many people prefer lead keel in favour of iron. The main argument is that lead is much heavier than iron and a lead keel can therefore be made smaller which again result in less wet surface, i.e. less drag. In fact iron is quite heavy, just 30% less heavy than lead, so the advantage of a lead keel is often overstated. As the surface of a fin type keel is just a fraction of the total wet surface, the difference between an iron keel and a lead keel can in reality be ignored for cruising yachts.

The boat can enter even shallow marinas as the draft is just about 1.35 - 1.45 meter (4.43 - 4.73 ft) dependent on the load. See immersion rate below.

The Moody 33 Mk II has been equipped with different engine alternatives.

Alternative 1:

Moody 33 Mk II may be equipped with an inboard Thornycroft-Perkins engine at 35 hp (26 kW). Max speed is 8.0 knots.

The transmission is a shaft drive. A shaft drive will in the long run require less maintenance than other types of drive e.g. a sail drive.

Alternative 2:

The boat may be equipped with an inboard Thornycroft diesel engine at 36 hp (26 kW). Calculated max speed is about 7.3 knots

What is Capsize Screening Formula (CSF)?

The capsize screening value for Moody 33 Mk II is 2.10, indicating that this boat would not be accepted to participate in ocean races.

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 7.2 knots. The term "Theoretical Maximum Hull Speed" is widely used even though a boat can sail faster. The term shall be interpreted as above the theoretical speed a great additional power is necessary for a small gain in speed.

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Moody 33 Mk II is about 204 kg/cm, alternatively 1144 lbs/inch.
Meaning: if you load 204 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1144 lbs cargo on the boat it will sink 1 inch.

What is Motion Comfort Ratio (MCR)?

The Motion Comfort Ratio for Moody 33 Mk II is 20.9.

What is L/B (Length Beam Ratio)?

The l/b ratio for Moody 33 Mk II is 2.87.

What is a Ballast Ratio?

The ballast ratio for Moody 33 Mk II is 36%.

What is Displacement Length Ratio?

The DL-ratio for Moody 33 Mk II is 202 which categorizes this boat among 'light crusers & offshore racers'.

When buying anti-fouling bottom paint, it's nice to know how much to buy. The surface of the wet bottom is about 32m² (344 ft²).
Based on this, your favourite maritime shop can tell you the quantity you need.

Note: If you use a paint roller you will need more paint than if you use a paintbrush.

If you need to renew parts of your running rig and is not quite sure of the dimensions, you may find the estimates computed below useful.

This section is reserved boat owner's modifications, improvements, etc. Here you might find (or contribute with) inspiration for your boat.

Do you have changes/improvements you would like to share? Upload a photo and describe what you have done.

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