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Review of Hughes 38 Mk I


Basic specs.

sail specifications
The Hughes 38 Mk I is a sailboat designed by the American maritime architect bureau Sparkman & Stephens in the late sixties. The Hughes 38 Mk I is built by the Canadian yard Hughes Boat Works Ltd..

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Rig

The Hughes 38 Mk I is equipped with a masthead rig. The advantage of a masthead rig is its simplicity and the fact that a given sail area - compared with a fractional rig - can be carried lower and thus with less heeling moment.


Keel

Fin keel

The Hughes 38 Mk I is equipped with a fin keel. The fin keel is the most common keel and provides splendid manoeuvrability. The downside is that it has less directional stability than a long keel.

The boat can enter most marinas as the draft is just about 1.78 - 1.88 meter (5.84 - 6.14 ft) dependent on the load. See immersion rate below.


Engine

The boat may be equipped with an inboard Universal Atomic 4 gasoline engine at 30 hp (22 kW).


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.

Theoretical Maximum Hull Speed

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 7.0 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 Hughes 38 Mk I is about 171 kg/cm, alternatively 960 lbs/inch.
Meaning: if you load 171 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 960 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.

L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Hughes 38 Mk I is 3.72.

Wide Slim 90% 0 50 100
Compared with other similar sailboats it is slimmer than 90% of all other designs. It seems that the designer has chosen a significantly more speedy hull design. This type of design is also referred to as 'needle'.


Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Hughes 38 Mk I is 50%.

Low High 93% 0 50 100
This ballast ratio shows a righting moment that is higher than 93% of all similar sailboat designs. A righting moment (ability to resist heeling) significantly above average.


Over- / underrigged

Low High 46% 0 50 100
The Hughes 38 Mk I has more rig than 46% of all similar sailboats, which indicates that the boat is slightly underrigged.


Maintenance

Bottom Paint

When buying anti-fouling bottom paint, it's nice to know how much to buy. The surface of the wet bottom is about 30m2 (322 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.


Rig

Dimensions of sail for masthead rig.

mainsail specifications headsail specifications

Are your sails worn out? You might find your next sail here: Sails for Sale



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
Mainsail halyard 31.2 m(102.3 feet)12 mm(1/2 inch)
Jib/genoa halyard31.2 m(102.3 feet)12 mm(1/2 inch)
Spinnaker halyard31.2 m(102.3 feet)12 mm(1/2 inch)
Jib sheet 11.6 m(38.0 feet)14 mm(0.55 inch)
Genoa sheet11.6 m(38.0 feet)14 mm(0.55 inch)
Mainsheet 28.9 m(95.0 feet)14 mm(0.55 inch)
Spinnaker sheet25.5 m(83.6 feet)14 mm(0.55 inch)
Cunningham4.2 m(13.7 feet)12 mm(1/2 inch)
Kickingstrap8.4 m(27.4 feet)12 mm(1/2 inch)
Clew-outhaul8.4 m(27.4 feet)12 mm(1/2 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 Hughes 38 Mk I 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