Review of Javelin 30
Javelin 30 anno 1976.
Basic specs.
Looking for a new boat? Find a Javelin 30 or similar boat for sale
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 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
Keel of Javelin 30 anno 1976.
Engine
The boat is typically equipped with an inboard Bukh diesel engine at 20.0 hp (14 kW), which gives a max speed about 5.7 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.
Stability and Safety
What is Capsize Screening Formula (CSF)?
The capsize screening value for Javelin 30 is 1.84, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.
The capsize screening value for Javelin 30 is 1.84, 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 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 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.
Immersion rate
The immersion rate is defined as the weight required to sink the boat a certain level.
The immersion rate for Javelin 30 is about 123 kg/cm, alternatively 691 lbs/inch.
Meaning: if you load 123 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 691 lbs cargo on the boat it will sink 1 inch.
Meaning: if you load 123 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 691 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 Javelin 30 is 25.1.
Comparing this ratio with similar sailboats show that it is more comfortable than 58% of all similar sailboat designs.
This comfort value is just above average.
The Motion Comfort Ratio for Javelin 30 is 25.1.
L/B (Length Beam Ratio)
What is L/B (Length Beam Ratio)?
The l/b ratio for Javelin 30 is 3.37.
Compared with other similar sailboats it is slimmer than 76% of all other designs.
It seems that the designer has chosen a significantly more speedy hull design.
The l/b ratio for Javelin 30 is 3.37.
D/L (Displacement Length Ratio)
What is Displacement Length Ratio?
The DL-ratio for Javelin 30 is 315 which categorizes this boat among 'medium weight cruisers'.
24% 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.
The DL-ratio for Javelin 30 is 315 which categorizes this boat among 'medium weight cruisers'.
SA/D (Sail Area Displacement ratio)
What is SA/D (Sail Area Displacement ratio)?
The SA/D for Javelin 30 with ISO 8666 reference sail is 13.8, with a 135% genua the SA/D is 16.6.
The SA/D ratio indicates that it is faster than 21% of all similar sailboat designs in light wind.
The SA/D for Javelin 30 with ISO 8666 reference sail is 13.8, with a 135% genua the SA/D is 16.6.
RSP (Relative Speed Performance)
What is Relative Speed Performance?
The Relative Speed Performance for Javelin 30 is 34
The relative speed performance is 34 which means that a it is faster than 34% of all similar sailboat designs.
The Relative Speed Performance for Javelin 30 is 34
Maintenance
Rig
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.
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 | 23.1 m | (75.8 feet) | 10 mm | (3/8 inch) |
| Jib/genoa halyard | 23.1 m | (75.8 feet) | 10 mm | (3/8 inch) |
| Spinnaker halyard | 23.1 m | (75.8 feet) | 10 mm | (3/8 inch) |
| Jib sheet | 9.3 m | (30.4 feet) | 12 mm | (1/2 inch) |
| Genoa sheet | 9.3 m | (30.4 feet) | 12 mm | (1/2 inch) |
| Mainsheet | 23.2 m | (76.0 feet) | 12 mm | (1/2 inch) |
| Spinnaker sheet | 20.4 m | (66.9 feet) | 12 mm | (1/2 inch) |
| Cunningham | 2.9 m | (9.6 feet) | 10 mm | (3/8 inch) |
| Kickingstrap | 5.9 m | (19.2 feet) | 10 mm | (3/8 inch) |
| Clew-outhaul | 5.9 m | (19.2 feet) | 10 mm | (3/8 inch) |
We are always looking for new photos. If you can contribute with photos for Javelin 30 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