Solus Alta anno 1982. Jolly Jumper i fuld fart og fin balance under en Gordon Gin Cup på Öresund

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Hull

Both the hull and the deck 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.

Unfortunately, the hull is not a double hull which affects the indoor climate. Especially if the water is considerable colder than the cabin, then one might expect condense water in the cabin.

Unfortunately, the hull is not a double hull which affects the indoor climate. Especially if the water is considerable colder than the cabin, then one might expect condense water in the cabin.

Interior

The boat is equipped with 5-6 berths, a galley and toilet facility.

Note: the boat has also been sold to be self-made/-interiored, which means that the quality of each boat may vary.

Note: the boat has also been sold to be self-made/-interiored, which means that the quality of each boat may vary.

Rig

The boat has 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 genaker or a spinnaker for optimal speed.

Keel

Solus Alta has a fin keel which means that it is more manoeuvrable but has less directional stability than a similar boat with a long keel.
The keel is made of iron.
Many people prefer lead keel in favour of iron.
The main argument is that lead is much heavier than iron and a lead keel can therefore be made smaller which again result in less wet surface, *i.e.* less drag.
In fact iron is quite heavy, just 30% less heavy than lead, so the advantage of a lead keel is often overstated.
As the surface of a finn type keel is just a fraction of the total wet surface,
the difference between an iron keel and a lead keel can in reality be ignored for cruising yachts.
The boat can enter most marinas as the draft is just about 1.55 - 1.65 meter (5.09 - 5.39 ft) dependent on the load. See immersion rate below.

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 Solus Alta is 1.86, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.

The capsize screening value for Solus Alta is 1.86, 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 6.7 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 6.7 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 Solus Alta is about 121 kg/cm, alternative 679 lbs/inch.

Meaning: if you load 121 kg cargo on the boat then it will sink 1 cm. Alternative, if you load 679 lbs cargo on the boat it will sink 1 inch.

Meaning: if you load 121 kg cargo on the boat then it will sink 1 cm. Alternative, if you load 679 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 22,000 boat types and 350,000 data points.

Motion Comfort Ratio

What is Motion Comfort Ratio (MCR)?

The Motion Comfort Ratio for Solus Alta is 18.1.

Comparing this ratio with similar sailboats show that it is more comfortable than 21% of all similar sailboat designs.
A comfort value significantly below average.

The Motion Comfort Ratio for Solus Alta is 18.1.

L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Solus Alta is 3.83.

Compared with other similar sailboats it is slimmer than 97% 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'.

The l/b ratio for Solus Alta is 3.83.

Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Solus Alta is 54%.

This ballast ratio shows a righting moment that is higher than 98% of all similar sailboat designs.
A righting moment (ability to resist heeling) significantly above average.

The ballast ratio for Solus Alta is 54%.

D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for Solus Alta is 142 which categorizes this boat among 'ultra light racers'.

92% of all similar sailboat designs are categorized as heavier.
A light displacement requires less sailarea and has higher accellerations.

The DL-ratio for Solus Alta is 142 which categorizes this boat among 'ultra light racers'.

RSP (Relative Speed Performance)

What is Relative Speed Performance?

The Relative Speed Performance for Solus Alta is 90

The relative speed performance is 90 which means that a it is faster than 90% of all similar sailboat designs.

The Relative Speed Performance for Solus Alta is 90

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 22m^{2} (236 ft^{2}).

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.

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

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 | ||

Jib sheet | 9.2 m | (30.2 feet) | 12 mm | (1/2 inch) |

Genoa sheet | 9.2 m | (30.2 feet) | 12 mm | (1/2 inch) |

Mainsheet | 23.0 m | (75.5 feet) | 12 mm | (1/2 inch) |

Spinnaker sheet | 20.2 m | (66.4 feet) | 12 mm | (1/2 inch) |

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References