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Review of H-35


H-35
H-35 anno 1979.


Basic specs.

sail specifications
The H-35 is a sailboat designed by the Finnish maritime architect Hans Groop in the mid seventies. A few hundred boats have been produced. The H-35 is built by the Finnish yard Artekno OY.

Looking for a new boat? Find a H-35 or similar boat for sale

Hull
Both the hull and the deck is made of hand laid fibreglass. Generally, a hull made of hand laid fibreglass requires only a minimum of maintenance during the sailing season.
The deck is a double deck which improves the indoor climate.

Interior
The interior is like most other boats made of teak.
The boat is equipped with 5 berths, a galley and toilet facility.

Cockpit
Cockpit
Cockpit of H-35 anno 1979.
Rig
The boat has more than one rig.

One option is 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

The H-35 has been built with more than one type of keel.

One option is a fin keel. A boat with a fin keel is more manoeuvrable but has less directional stability than a similar boat with a long keel.

The keel is made of lead. Compared with iron, lead has the advantage of being 44% heavier, which allows a smaller keel and hence less water resistance and higher speed.

H-35 can enter most marinas as the draft is just about 1.50 - 1.60 meter (4.92 - 5.22 ft) dependent on the load. See immersion rate below.


Engine
Motor
H-35 anno 1979. New engine installed: Yanmar 3YM20

The boat is typically equipped with an inboard Yanmar YS8M diesel engine.

The fuel tank which is made of steel has a capacity of 30.0 liters (7 US gallons, 6 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.

Stability and Safety

What is Capsize Screening Formula (CSF)?

The capsize screening value for H-35 is 1.73, 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 6.9 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 H-35 is about 141 kg/cm, alternatively 790 lbs/inch.
Meaning: if you load 141 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 790 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 H-35 is 23.6.

Low High 34% 0 50 100
Comparing this ratio with similar sailboats show that it is more comfortable than 34% of all similar sailboat designs. This comfort value is just below average.


L/B (Length Beam Ratio)

What is L/B (Length Beam Ratio)?

The l/b ratio for H-35 is 4.04.

Wide Slim 99% 0 50 100
Compared with other similar sailboats it is slimmer than 99% 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'.


Ballast Ratio

What is a Ballast Ratio?

The ballast ratio for H-35 is 43%.

Low High 66% 0 50 100
This ballast ratio shows a righting moment that is higher than 66% of all similar sailboat designs. A righting moment (ability to resist heeling) just above average.


D/L (Displacement Length Ratio)

What is Displacement Length Ratio?

The DL-ratio for H-35 is 183 which categorizes this boat among 'light racers'.

Heavy Light 79% 0 50 100
79% of all similar sailboat designs are categorized as heavier. A light displacement requires less sailarea and has higher accellerations.


SA/D (Sail Area Displacement ratio)

What is SA/D (Sail Area Displacement ratio)?

The SA/D for H-35 with ISO 8666 reference sail is 16.0, with a 135% genua the SA/D is 18.8.

Low High 38% 0 50 100
The SA/D ratio indicates that it is faster than 38% of all similar sailboat designs in light wind.


Over- / underrigged

Low High 82% 0 50 100
The H-35 has more rig than 82% of all similar sailboats, which indicates that the boat is significantly overrigged.


Maintenance

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 25m2 (269 ft2).
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

Dimensions of sail for fractional rig.

mainsail specifications headsail specifications

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
Fractional rig
UsageLengthDiameter
Mainsail halyard 28.7 m(94.2 feet)10 mm(3/8 inch)
Jib/genoa halyard28.7 m(94.2 feet)10 mm(3/8 inch)
Spinnaker halyard28.7 m(94.2 feet)10 mm(3/8 inch)
Jib sheet 10.5 m(34.4 feet)12 mm(1/2 inch)
Genoa sheet10.5 m(34.4 feet)12 mm(1/2 inch)
Mainsheet 26.2 m(86.1 feet)12 mm(1/2 inch)
Spinnaker sheet23.1 m(75.8 feet)12 mm(1/2 inch)
Cunningham3.4 m(11.1 feet)10 mm(3/8 inch)
Kickingstrap6.8 m(22.2 feet)10 mm(3/8 inch)
Clew-outhaul6.8 m(22.2 feet)10 mm(3/8 inch)
Fractional rig
UsageLengthDiameter
Mainsail halyard 28.8 m(94.5 feet)10 mm(3/8 inch)
Jib/genoa halyard28.8 m(94.5 feet)10 mm(3/8 inch)
Spinnaker halyard28.8 m(94.5 feet)10 mm(3/8 inch)
Jib sheet 10.5 m(34.4 feet)12 mm(1/2 inch)
Genoa sheet10.5 m(34.4 feet)12 mm(1/2 inch)
Mainsheet 26.2 m(86.1 feet)12 mm(1/2 inch)
Spinnaker sheet23.1 m(75.8 feet)12 mm(1/2 inch)
Cunningham3.4 m(11.2 feet)10 mm(3/8 inch)
Kickingstrap6.8 m(22.3 feet)10 mm(3/8 inch)
Clew-outhaul6.8 m(22.3 feet)10 mm(3/8 inch)

Boat owner's ideas

This section shown boat owner's changes, improvements, etc. Here you might find inspiration for your boat.

Do you have changes/improvements you would like to share? Upload a photo and describe what to look for.



Finally

We are always looking for new photos. If you can contribute with photos for H-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