Review of Comfort 30
Basic specs..
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.
The boat is equipped with 5 berths, a galley and toilet facility.
The boat 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.
The Comfort 30 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 lead. Compared with iron, lead has the advantage of being 44% heavier, which allows a smaller keel and hence less water resistance and higher speed.
The boat can enter most marinas as the draft is just about 1.68 - 1.78 meter (5.51 - 5.81 ft) dependent on the load. See immersion rate below.
Comfort 30 is typically equipped with an inboard Yanmar diesel engine at 8.0 hp (5 kW), which gives a max speed about 3.8 knots.
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.
What is Capsize Screening Formula (CSF)?
The capsize screening value for Comfort 30 is 2.05, 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 6.5 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 Comfort 30 is about 143 kg/cm, alternatively 803 lbs/inch. Meaning: if you load 143 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 803 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.
What is Motion Comfort Ratio (MCR)?
What is L/B (Length Beam Ratio)?
What is a Ballast Ratio?
What is Displacement Length Ratio?
What is SA/D (Sail Area Displacement ratio)?
What is Relative Speed Performance?
Maintenance
When buying anti-fouling bottom paint, it's nice to know how much to buy. The surface of the wet bottom is about 25m 2 (269 ft 2 ). Based on this, your favourite maritime shop can tell you the quantity you need.
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.
| Usage | Length | Diameter | ||
| Mainsail halyard | 26.3 m | (86.3 feet) | 10 mm | (3/8 inch) |
| Jib/genoa halyard | 26.3 m | (86.3 feet) | 10 mm | (3/8 inch) |
| Spinnaker halyard | 26.3 m | (86.3 feet) | 10 mm | (3/8 inch) |
| Jib sheet | 9.1 m | (29.8 feet) | 12 mm | (1/2 inch) |
| Genoa sheet | 9.1 m | (29.8 feet) | 12 mm | (1/2 inch) |
| Mainsheet | 22.7 m | (74.6 feet) | 12 mm | (1/2 inch) |
| Spinnaker sheet | 20.0 m | (65.6 feet) | 12 mm | (1/2 inch) |
| Cunningham | 3.0 m | (9.8 feet) | 10 mm | (3/8 inch) |
| Kickingstrap | 6.0 m | (19.7 feet) | 10 mm | (3/8 inch) |
| Clew-outhaul | 6.0 m | (19.7 feet) | 10 mm | (3/8 inch) |
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.
We are always looking for new photos. If you can contribute with photos for Comfort 30 it would be a great help.
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- Sailboat Guide
Comfort 30 is a 29 ′ 9 ″ / 9.1 m monohull sailboat designed by Rolf Magnusson and built by Robertson and Sons Ltd. and Comfortbåtar AB between 1972 and 1980.
Rig and Sails
Auxilary power, accomodations, calculations.
The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.
Classic hull speed formula:
Hull Speed = 1.34 x √LWL
Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio .311 Hull Speed = Max Speed/Length ratio x √LWL
Sail Area / Displacement Ratio
A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.
SA/D = SA ÷ (D ÷ 64) 2/3
- SA : Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
- D : Displacement in pounds.
Ballast / Displacement Ratio
A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.
Ballast / Displacement * 100
Displacement / Length Ratio
A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.
D/L = (D ÷ 2240) ÷ (0.01 x LWL)³
- D: Displacement of the boat in pounds.
- LWL: Waterline length in feet
Comfort Ratio
This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.
Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam 1.33 )
- D: Displacement of the boat in pounds
- LOA: Length overall in feet
- Beam: Width of boat at the widest point in feet
Capsize Screening Formula
This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.
CSV = Beam ÷ ³√(D / 64)
Based on the JOKER S30 by Rolf Magnusson. A few were built in the mid 1970s by Robertsons of Scotland (12?), but most were built in Sweden.
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- About Sailboat Guide
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The Comfort 30 is a 29.82ft masthead sloop designed by Rolf Magnusson and built in fiberglass by Comfortbåtar AB between 1972 and 1980.
1000 units have been built..
The Comfort 30 is a moderate weight sailboat which is a reasonably good performer. It is very stable / stiff and has a low righting capability if capsized. It is best suited as a coastal cruiser.
Comfort 30 for sale elsewhere on the web:
Main features
| Model | Comfort 30 | ||
| Length | 29.82 ft | ||
| Beam | 9.94 ft | ||
| Draft | 5.51 ft | ||
| Country | Sweden (Europe) | ||
| Estimated price | $ 0 | ?? |
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| Sail area / displ. | 16.67 | ||
| Ballast / displ. | 42.12 % | ||
| Displ. / length | 260.09 | ||
| Comfort ratio | 20.95 | ||
| Capsize | 2.06 |
| Hull type | Monohull fin keel with rudder on skeg | ||
| Construction | Fiberglass | ||
| Waterline length | 23.20 ft | ||
| Maximum draft | 5.51 ft | ||
| Displacement | 7275 lbs | ||
| Ballast | 3064 lbs | ||
| Hull speed | 6.45 knots |
We help you build your own hydraulic steering system - Lecomble & Schmitt
| Rigging | Masthead Sloop | ||
| Sail area (100%) | 390 sq.ft | ||
| Air draft | 0 ft | ?? | |
| Sail area fore | 228.58 sq.ft | ||
| Sail area main | 161.38 sq.ft | ||
| I | 38.71 ft | ||
| J | 11.81 ft | ||
| P | 32.80 ft | ||
| E | 9.84 ft |
| Nb engines | 1 | ||
| Total power | 0 HP | ||
| Fuel capacity | 0 gals |
Accommodations
| Water capacity | 0 gals | ||
| Headroom | 0 ft | ||
| Nb of cabins | 0 | ||
| Nb of berths | 0 | ||
| Nb heads | 0 |
Builder data
| Builder | Comfortbåtar AB | ||
| Designer | Rolf Magnusson | ||
| First built | 1972 | ||
| Last built | 1980 | ||
| Number built | 1000 |
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Definitions. Hull Type: Fin with rudder on skeg. Rigging Type: Masthead Sloop. LOA: 29.82 ft / 9.09 m. LWL: 23.20 ft / 7.07 m.
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Comfort 30 is a 29′ 9″ / 9.1 m monohull sailboat designed by Rolf Magnusson and built by Robertson and Sons Ltd. and Comfortbåtar AB between 1972 and 1980.
The Comfort 30 is a 29.82ft masthead sloop designed by Rolf Magnusson and built in fiberglass by Comfortbåtar AB between 1972 and 1980. 1000 units have been built. The Comfort 30 is a moderate weight sailboat which is a reasonably good performer.
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