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Review of Wellington 47


Wellington 47
Wellington 47 anno 1991. The original owner/builder added a bow pulpit to extend the boat to 49´

Basic specs.

sail specifications
The Wellington 47 is a large motorsailer designed by the maritime architect bureau John G. Alden, Inc. in the late seventies. Only a few boats have been produced. The Wellington 47 is built by the American yard Wellington Boats Inc..

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Hull

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


Interior

The boat is equipped with 1665.0 liter fresh water capacity.


Keel
Keel
Keel of Wellington 47 anno 1991.

CentreBoard

The Wellington 47 is equipped with a centreboard keel. A centreboard keel is a pivoting lifting keel, allowing to sail both coastal and inland waters.

The boat can enter even shallow marinas as the draft is just about 1.47 - 1.57 meter (4.82 - 5.12 ft) dependent on the load. See immersion rate below.


Engine

Wellington 47 may be equipped with an inboard Ford Lehman 4D-254 diesel engine at 185 hp (137 kW). Calculated max speed is about 9.4 knots

The fuel tank has a capacity of 1779.0 liters (469 US gallons, 391 imperial gallons).


Sailing characteristics

This section covers widely used rules of thumb to describe the sailing characteristics. Please note that even though the calculations are correct, the interpretation of the results might not be valid for extreme boats.

Stability and Safety

What is Capsize Screening Formula (CSF)?

The capsize screening value for Wellington 47 is 1.52, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.


Theoretical Maximum Hull Speed

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 8.3 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.


Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Wellington 47 is about 324 kg/cm, alternatively 1818 lbs/inch.
Meaning: if you load 324 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1818 lbs cargo on the boat it will sink 1 inch.


Sailing statistics

This section is statistical comparison with similar boats of the same category. The basis of the following statistical computations is our unique database with more than 26,000 different boat types and 350,000 data points.

Motion Comfort Ratio

What is Motion Comfort Ratio (MCR)?

The Motion Comfort Ratio for Wellington 47 is 52.5.

Low High 98% 0 50 100
Comparing this ratio with similar sailboats show that it is more comfortable than 98% of all similar sailboat designs. This is a comfort value significantly above average.


L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Wellington 47 is 3.48.

Wide Slim 54% 0 50 100
Compared with other similar sailboats it is slimmer than 54% of all other designs. It seems that the designer has chosen a slightly more speedy hull design.


Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Wellington 47 is 24%.

Low High 7% 0 50 100
This ballast ratio shows a righting moment that is higher than 7% of all similar sailboat designs. A righting moment (ability to resist heeling) significantly below average.


D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Wellington 47 is 347 which categorizes this boat among 'heavy cruisers'.

Heavy Light 12% 0 50 100
12% of all similar sailboat designs are categorized as heavier. A heavy displacement combined with smaller water plane area has lower acceleration and is more comfortable.


SA/D (Sail Area Displacement ratio)

SA/D (Sail Area Displacement ratio)
Indicates how fast the boat is in light wind:
- Cruising Boats have ratios 10-15
- Cruiser-Racers have ratios 16-20
- Racers have ratios above 20
- High-Performance Racers have ratios above 24
Sail-area/displacement ratio (SA/D ratio): 14.02


Maintenance

Rig

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.



Guiding dimensions of running rig
UsageLengthDiameter
Jib sheet 14.3 m(46.9 feet)16 mm(5/8 inch)
Genoa sheet14.3 m(46.9 feet)16 mm(5/8 inch)
Mainsheet 35.8 m(117.3 feet)16 mm(5/8 inch)
Spinnaker sheet31.5 m(103.2 feet)16 mm(5/8 inch)

Boat owner's ideas

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.



Finally

We are always looking for new photos. If you can contribute with photos for Wellington 47 it would be a great help.

If you have any comments to the review, improvement suggestions, or the like, feel free to contact us. Criticism helps us to improve.



References