amel sharki sailboatdata

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• Amel Sharki

The Amel Sharki Sailboat Specs & Key Performance Indicators

The Amel Sharki ketch, designed by French naval architects Henri Amel and Jacques Carteau, was built by Chantiers Amel in La Rochelle, France. First introduced in 1979, the Sharki was produced until 1987.

Published Specification for the Amel Sharki

Keel & Rudder Configuration: Fin keel & skeg-hung rudder Hull Material: GRP (Fibreglass) Length Overall: 39'3" (12.0 m) Waterline Length: 31'10" (9.7 m) Beam: 11'8" (3.6 m) Draft: 6'1" (1.9 m) Rig Type: Ketch Displacement: 21,300 lb (9,662 kg) Ballast: 7,060 lb (3,202 kg) Designer: Henri Amel & Jacques Carteau Builder: Amel (France) Year First Built: 1979 Year Last Built: 1987 Number Built: 195

Sail Areas & Rig Dimensions

I: 45'11" (14.0 m) J: 15'1" (4.6 m) P: 40'0" (12.2 m) E: 13'9" (4.2 m)

Sail Areas:

• Mainsail Area: 237 ft² (22 m²)
• Mizzen Sail Area: 108 ft² (10 m²)
• Genoa Area: 474 ft² (44 m²)
• Upwind Sail Area: 818 ft² (76 m²)
• Downwind Sail Area: 1001 ft² (93 m²)

Published Design Ratios The Key Performance Indicators (KPIs)

• Sail Area/Displacement Ratio: 16.9
• Ballast/Displacement Ratio: 33.2
• Displacement/Length Ratio: 294
• Comfort Ratio: 36.6
• Capsize Screening Formula: 1.69

The following analysis of the primary design ratios gives an indication of the boat's likely sailing characteristics, but see the 'Notes of Cautio n'  that follow below :

• Performance: With a Sail Area/Displacement Ratio of 16.9, the Amel Sharki falls within the range of 'reasonably good performance.' It should be able to achieve respectable boat speed and handle a variety of wind conditions.
• Stability and Power: A Ballast/Displacement Ratio of 33.2 suggests the Amel Sharki has good stability and can stand up well to strong winds. While not exceptionally high, this ratio indicates a good balance between stability and maneuverability.
• Displacement: The Displacement/Length Ratio of 294 places the Amel Sharki firmly in the 'Heavy Displacement' category. This means it will be more stable and comfortable in rough seas but might be slightly slower than a lighter displacement boat. 
• Comfort: A Comfort Ratio of 36.6 indicates a 'reasonably sedate motion,' making the Amel Sharki well-suited for extended voyages and comfortable living aboard. 
• Bluewater Capability: The Capsize Screening Formula of 1.69 is well below the 2.0 threshold, indicating the Amel Sharki is designed with bluewater capability in mind. The combination of its displacement and beam suggests good resistance to capsizing, making it suitable for ocean passages.

Overall: The Amel Sharki's design ratios point to a sailboat designed for a comfortable and safe bluewater cruising experience without sacrificing too much on performance.

Here's how to calculate the KPIs yourself -  without having to wrestle with the mathematics...

Design Ratios: Notes of Caution...

• The Sail Area/Displacement Ratio (SA/D): This ratio provides an estimate of the sail power relative to the boat's weight, which can indicate potential speed in various wind conditions.  But i t doesn't account for the efficiency of the sail plan, the rigging, or the skill of the crew. Real-world performance can vary significantly based on these factors.
• The Ballast/Displacement Ratio (B/D): This ratio gives an idea of the boat's stability and stiffness, which is crucial for handling and safety.  But  it doesn't consider the distribution of the ballast or the hull shape, both of which can greatly affect stability. A high B/D ratio alone doesn't guarantee a stable boat if the ballast is poorly distributed.
• The Displacement/Length Ratio (D/L): This ratio helps predict the boat's speed potential and its behaviour in different sea conditions.  But  it doesn't account for the hull design or the boat's overall weight distribution. Two boats with the same D/L ratio can perform very differently if their hull shapes are different.
• The Comfort Ratio (CR): This ratio estimates the boat's motion comfort in a seaway, which is important for long passages.  But  it doesn't consider the boat's interior layout, which can also affect comfort. Additionally, personal tolerance to motion varies, so a boat that is comfortable for one person might not be for another.
• The Capsize Screening Formula (CSF): This formula assesses the likelihood of a boat capsizing in heavy seas, which is critical for offshore safety.  But  it doesn't take into account the boat's handling characteristics or the skill of the crew. A boat with a low CSF can still capsize if poorly handled in severe conditions.

General Limitations

• Static Nature: These ratios are static measurements and don't account for dynamic factors like wave action, wind gusts, or crew actions.
• Simplification: They simplify complex interactions into single numbers, which can be misleading. Real-world performance is influenced by a multitude of factors that these ratios can't fully capture.
• Context: The context in which the boat is used (e.g., coastal cruising vs. offshore racing) can greatly affect how these ratios should be interpreted.

In summary, while these ratios provide valuable insights into the theoretical performance characteristics of a sailboat, they should be used as part of a broader assessment that includes practical experience, sea trials, and expert advice.

The above text was drafted by sailboat-cruising.com using GPT-4 (OpenAI’s large-scale language-generation model) as a research assistant to develop source material; we believe it to be accurate to the best of our knowledge.

Other sailboats in the Amel range include:

I wrote this article using GPT-4, OpenAI’s large-scale language-generation model, as a research assistant to develop source material. I wrote the final draft in its entirety and believe it to be accurate to the best of my knowledge.

Dick McClary, creator and owner of sailboat-cruising.com

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Sailboat specifications

• Last update: 28th March 2020

Sharki's main features

Sharki's main dimensions, sharki's rig and sails, sharki's performances, sharki's auxiliary engine, sharki's accommodations and layout.

Similar sailboats that may interest you:

Sharki 39 amel

The sharki 39 amel is a 39.24ft masthead ketch designed by henri amel/j. carteau and built in fiberglass by amel between 1980 and 1987., 195 units have been built..

The Sharki 39 amel is a moderate weight sailboat which is a reasonably good performer. It is reasonably stable / stiff and has an excellent righting capability if capsized. It is best suited as a bluewater cruising boat. The fuel capacity is average. There is an excellent water supply range.

Sharki 39 amel for sale elsewhere on the web:

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• Sailboat Guide

Amel Sharki 39

Amel Sharki 39 is a 39 ′ 2 ″ / 11.9 m monohull sailboat designed by Henri Amel and built by Amel between 1980 and 1987.

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)

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Review of Sharki

Basic specs..

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.

The boat is equipped with 2 cabins, 8 berths, a galley, 700.0 liter fresh water capacity and toilet facility.

The boat equipped with a ketch rig. A ketch rig is generally considered easier to handle, because the sails are smaller, and because it can sail on most points to the wind with one sail completely taken down for repair or while reefing. The sail configuration of a ketch allows for better comfort and stability when sailing downwind or on a broad reach.

The Sharki 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 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 fin 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 1.75 - 1.85 meter (5.74 - 6.04 ft) dependent on the load. See immersion rate below.

Sharki is typically equipped with an inboard Perkins 4.108 diesel engine at 48 hp (35 kW). Calculated max speed is about 6.3 knots

The transmission is a shaft drive. A shaft drive will in the long run require less maintenance than other types of drive e.g. a sail drive.

The fuel tank has a capacity of 340.0 liters (89 US gallons, 74 imperial gallons).

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 Sharki is 1.71, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.

Sharki holds one CE certification:

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 7.6 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 Sharki is about 233 kg/cm, alternatively 1310 lbs/inch. Meaning: if you load 233 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1310 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?

Maintenance

When buying anti-fouling bottom paint, it's nice to know how much to buy. The surface of the wet bottom is about 39m 2 (419 ft 2 ). Based on this, your favourite maritime shop can tell you the quantity you need.

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.

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 Sharki 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.

Sharki 39 - Amel / STW001720

cabin cruiser

perkins 4108 ,50cv

overall length

hull length

waterline length

standard draft

minimum draft

displacement

diesel tank

mast height

Accomodation layouts

standard version

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Builder : Chantiers Amel (FRA) Designer : Henri Amel/J. Carteau Model : Sharki Year Constructed : 1988 Hull Type : Fin with rudder on skeg Rig Type : Masthead Ketch LOA : 11.96 m LWL : 9.71 m Beam : 3.60 m Listed SA : 74.97 m2 / 807 ft2 Draft (max.) : 1.85 m Disp : 7,802 kg / 17,200 lbs Ballast : 3,202 kg / 7,060 lbs Mast Height from DWL : 14.95 m / 49.05 ft Construction : Fiberglass

AUXILIARY POWER Perkins 4108, 48 hp

Source : sailboatdata.com

We miss you already!

We haven’t even left yet!

Just accessing this blog now – wow – so envious! Enjoy the travels, and I look forward to reading about the trip as you go along!

Sorry to leave this as a web comment, but I couldn’t find any email address 8-(

I’m a retiring engineer in San Diego California. I’m very interested in the Amel Sharki. Especially the 1988 and 1989 models.

Do you still own this Sharki? or know the current owner?

If you feel your Sharki is ready for new transoceanic adventures, please consider selling her to me.

I hope you’ll let me know.

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