Review of Parant 25
The Parant 25 is a small motorsailer designed by the Swedish maritime architect Einar Ohlson
in the mid seventies. A few hundred boats have been produced. The Parant 25 is built by Fisksätra Varv
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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 interior is like most other boats made of teak.
The boat is equipped with 2 cabins, 5 berths and a galley.
The headroom is above average
Note: the boat has also been sold to be self-made/-interiored, which means that the quality of each boat may vary.
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.
Keel of Parant 25 anno 1976. Paranten på vej i vandet
Parant 25 is typically equipped with an inboard Volvo Penta MD11 engine at 23.0 hp (17 kW), which gives a max speed about 6.8 knots.
The transmission is a saildrive.
The fuel tank has a capacity of 60 liters (15 US gallons, 13 imperial gallons).
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
Theoretical Maximum Hull Speed
What is Theoretical Maximum Hull Speed?
The theoretical maximal speed of a displacement boat of this length is 6.3 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.
The immersion rate is defined as the weight required to sink the boat a certain level.
The immersion rate for Parant 25 is about 129 kg/cm, alternatively 724 lbs/inch.
Meaning: if you load 129 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 724 lbs cargo on the boat it will sink 1 inch.
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 Parant 25 is 20.9.
Comparing this ratio with similar sailboats show that it is more comfortable than 69% of all similar sailboat designs.
This comfort value is just above average.
L/B (Length Beam Ratio)
What is L/B (Length Beam Ratio)?
The l/b ratio for Parant 25 is 2.67.
Compared with other similar sailboats it is more spacy than 85% of all other designs.
It seems that the designer has chosen a significantly more spacy hull design.
D/L (Displacement Length Ratio)
What is Displacement Length Ratio?
The DL-ratio for Parant 25 is 250 which categorizes this boat among 'light crusers & offshore racers'.
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 Parant 25 with ISO 8666 reference sail is 12.5, with a 135% genua the SA/D is 15.1.
The SA/D ratio indicates that it is faster than 14% of all similar sailboat designs in light wind.
Don't panic! It is expected that motor sailers has a low SA/D value as this is the natural consequence of the design combining sailing and motor boat characteristics.
RSP (Relative Speed Performance)
What is Relative Speed Performance?
The Relative Speed Performance for Parant 25 is 18
The relative speed performance is 18 which means that a it is faster than 18% of all similar sailboat designs.
As this boat is a motor sailer, it is expected that the performance of a motor sailer for sail alone is lower than a dedicated sailboat.
Dimensions of sail for masthead rig.
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
|Mainsail halyard ||22.2 m||(72.8 feet)||8 mm||(5/16 inch)|
|Jib/genoa halyard||22.2 m||(72.8 feet)||8 mm||(5/16 inch)|
|Spinnaker halyard||22.2 m||(72.8 feet)||8 mm||(5/16 inch)|
|Jib sheet ||7.6 m||(24.9 feet)||10 mm||(3/8 inch)|
|Genoa sheet||7.6 m||(24.9 feet)||10 mm||(3/8 inch)|
|Mainsheet ||19.0 m||(62.3 feet)||10 mm||(3/8 inch)|
|Spinnaker sheet||16.7 m||(54.9 feet)||10 mm||(3/8 inch)|
|Cunningham||2.5 m||(8.2 feet)||8 mm||(5/16 inch)|
|Kickingstrap||5.0 m||(16.4 feet)||8 mm||(5/16 inch)|
|Clew-outhaul||5.0 m||(16.4 feet)||8 mm||(5/16 inch)|
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