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Review of Com-Pac 16 Mk 2


Basic specs.

sail specifications
The Com-Pac 16 Mk 2 is a small sailboat designed by the American maritime architect Clark Mills in the late seventies. The Com-Pac 16 Mk 2 is built by the American yard Com-Pac Yachts.

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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. And outside the sailing season, just bottom cleaning and perhaps anti-fouling painting once a year - a few hours of work, that's all.


Rig

The Com-Pac 16 Mk 2 is equipped with a fractional rig. A fractional rig has smaller headsails which make tacking easier, which is an advantage for cruisers and racers, of course. The downside is that having the wind from behind often requires a gennaker or a spinnaker for optimal speed.


Keel

CentreBoard

The Com-Pac 16 Mk 2 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 0.46 - 0.56 meter (1.51 - 1.81 ft) dependent on the load. See immersion rate below.


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 Com-Pac 16 Mk 2 is 2.33, indicating that this boat would not 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 5.0 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 Com-Pac 16 Mk 2 is about 52 kg/cm, alternatively 293 lbs/inch.
Meaning: if you load 52 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 293 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 Com-Pac 16 Mk 2 is 2.82.

Wide Slim 79% 0 50 100
Compared with other similar sailboats it is slimmer than 79% of all other designs. It seems that the designer has chosen a significantly more speedy hull design.


Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Com-Pac 16 Mk 2 is 41%.

Low High 76% 0 50 100
This ballast ratio shows a righting moment that is higher than 76% of all similar sailboat designs. A righting moment (ability to resist heeling) significantly above average.


D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Com-Pac 16 Mk 2 is 178 which categorizes this boat among 'light racers'.

Heavy Light 38% 0 50 100
38% 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)

What is SA/D (Sail Area Displacement ratio)?

The SA/D for Com-Pac 16 Mk 2 with ISO 8666 reference sail is 15.1, with a 135% genua the SA/D is 17.1.

Low High 21% 0 50 100
The SA/D ratio indicates that it is faster than 21% of all similar sailboat designs in light wind.


Over- / underrigged

Low High 42% 0 50 100
The Com-Pac 16 Mk 2 has more rig than 42% 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 9m2 (96 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 fractional 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 13.7 m(44.9 feet)6 mm(1/4 inch)
Jib/genoa halyard13.7 m(44.9 feet)6 mm(1/4 inch)
Spinnaker halyard13.7 m(44.9 feet)6 mm(1/4 inch)
Jib sheet 5.2 m(16.9 feet)8 mm(5/16 inch)
Genoa sheet5.2 m(16.9 feet)8 mm(5/16 inch)
Mainsheet 12.9 m(42.3 feet)8 mm(5/16 inch)
Spinnaker sheet11.4 m(37.2 feet)8 mm(5/16 inch)
Cunningham2.3 m(7.5 feet)6 mm(1/4 inch)
Kickingstrap4.6 m(15.0 feet)6 mm(1/4 inch)
Clew-outhaul4.6 m(15.0 feet)6 mm(1/4 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 Com-Pac 16 Mk 2 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