Review of Friendship 35

Basic specs.

The Friendship 35 is a sailboat designed by the Dutch maritime architect Jacobus de Ridder. The Friendship 35 is built by the Dutch yard Jachtwerf Meijer.

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Interior

The boat is equipped with 7 berths.

Keel

Unknown keel type

The boat can only enter major marinas as the draft is about 1.94 - 2.04 meter (6.36 - 6.66 ft) dependent on the load. See immersion rate below.

Engine

Friendship 35 is typically equipped with an inboard diesel engine at 23 hp (17 kW).

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.

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 Friendship 35 is 1.84, indicating that this boat could - if evaluated by this formula alone - be accepted to participate in ocean races.

Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Friendship 35 is about 244 kg/cm, alternatively 1368 lbs/inch.
Meaning: if you load 244 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1368 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.

L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for Friendship 35 is 3.01.

Compared with other similar sailboats it is more spacy than 69% of all other designs. It seems that the designer has chosen a slightly more spacy hull design.

Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for Friendship 35 is 36%.

This ballast ratio shows a righting moment that is higher than 27% of all similar sailboat designs. A righting moment (ability to resist heeling) just below average.

SA/D (Sail Area Displacement ratio)

SA/D (Sail Area Displacement ratio)
Indicates how fast the boat is in light wind:
- Cruising Boats have ratios 10-15
- Cruiser-Racers have ratios 16-20
- Racers have ratios above 20
- High-Performance Racers have ratios above 24
Sail-area/displacement ratio (SA/D ratio): 17.67

RSP (Relative Speed Performance)

What is Relative Speed Performance?

The Relative Speed Performance for Friendship 35 is 58

The relative speed performance is 58 which means that a it is faster than 58% of all similar sailboat designs.

Maintenance

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.

**Guiding dimensions of running rig**
Usage	Length		Diameter
Jib sheet	10.5 m	(34.4 feet)	12 mm	(1/2 inch)
Genoa sheet	10.5 m	(34.4 feet)	12 mm	(1/2 inch)
Mainsheet	26.2 m	(86.0 feet)	12 mm	(1/2 inch)
Spinnaker sheet	23.1 m	(75.6 feet)	12 mm	(1/2 inch)

Boat owner's ideas

This section is reserved boat owner's modifications, improvements, etc. Here you might find (or contribute with) inspiration for your boat.

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Finally

We are always looking for new photos. If you can contribute with photos for Friendship 35 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

[Ref 1]: ISO 8666 Small craft — Principal data.
[Ref 3]: ISO 12215-5 Small craft — Hull construction and scantlings.