Review of Formula 311 SRI
Basic specs.
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The hull is made of fibreglass while the deck is made of hand laid 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.
The hull is a double hull which improves the indoor climate. Especially when the water is colder than the air in the cabin, then the double hull insulates against cold water and reduce the condense water in the cabin.
The deck is a double deck which improves the indoor climate.
The interior is like most other boats made of teak. Teak has the advantage of being naturally very oily and therefore water-repellent, which is suitable on boats.
The boat is equipped with one cabin, 4-5 berths, a galley, 53.0 liter fresh water capacity and toilet facility.
Unknown keel type
The boat can enter even shallow marinas as the draft is just about 0.88 - 0.98 meter (2.89 - 3.19 ft) dependent on the load. See immersion rate below.
Formula 311 SRI may be equipped with dual inboard MerCruiser engines at 660 hp (491 kW). The speed is 67.0 knots.
The transmission is a Z-drive aka sterndrive.
The fuel tank, which is made of stainless steel, has a capacity of 572.0 liters (151 US gallons, 125 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.
The immersion rate is defined as the weight required to sink the boat a certain level.
The immersion rate for Formula 311 SRI is about 154 kg/cm, alternatively 865 lbs/inch.
Meaning: if you load 154 kg cargo on the boat then it will sink 1 cm.
Alternatively, if you load 865 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 L/B (Length Beam Ratio)?
The l/b ratio for Formula 311 SRI is 3.87.
Curiosities
In Denmark, you are required to have achieved a 'powerboat driving license' in order to sail a powerboat.
In this context a boat is considered a powerboat if:
Danish definition of a powerboat
Maintenance
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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