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Review of Grumman Dinghy


Basic specs.

sail specifications
The Grumman Dinghy is a small sailing dinghy designed by the American maritime architect Philip L. Rhodes in the late fifties.

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Hull
The hull is made of aluminium.

Keel

The Grumman Dinghy is equipped with a daggerboard keel. A daggerboard is a lifting keel that can be lowered and raised, allowing the boat to enter shallow waters as well.

The boat can sail close to the beach as the draft is just 0.06 - 0.16 meter (0.20 - 0.50 ft) dependent of the load. See immersion rate below.


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.

Immersion rate

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Grumman Dinghy is about 22 kg/cm, alternatively 123 lbs/inch.
Meaning: if you load 22 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 123 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 Grumman Dinghy is 2.05.

Slim Wide 79% 0 50 100
Compared with other similar dinghies it is more spacy than 79% of all other designs. It seems that the designer has chosen a significantly more spacy hull design.


Maintenance

Boat owner's ideas

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

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Finally

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References