Review of 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

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.

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

Cockpit of H-35 anno 1979.
The boat equipped with 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.

H-35 anno 1979. New engine installed: Yanmar 3YM20
The boat is typically equipped with an inboard Yanmar diesel engine at 8.0 hp (5 kW), which gives a max speed about 3.9 knots.
The transmission is a shaft drive. A shaft drive will in the long run require less maintenence than other types of drive e.g. a sail drive.
The fuel tank which is made of steel has a capacity of 30 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'.

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.


Dimensions of sail.
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
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)

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