Review of Broom 10.70 Sceptre

Broom 10.70 Sceptre anno 1986. Broom 1070 in Norway Bergen. Two Cummins 5,9 l diesels.

Basic specs.

The Broom 10.70 Sceptre is a motorboat designed by the British maritime architect John A. Bennet. The Broom 10.70 Sceptre is built by the British yard C. J. Broom & Sons Ltd..

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Hull

Both the hull and the deck is made of fibreglass. Generally, a hull made of fibreglass requires only a minimum of maintenance during the sailing season.

Interior

The boat is equipped with 3 cabins, 6 berths, a galley, toilet facility and 80.0 liter waste water capacity.
The headroom is above average

Engine

The boat is typically equipped with dual inboard Volvo Penta TMD 40B diesel engines at 270.0 hp (201 kW).

The transmission is a shaft drive.

The fuel tank which is made of steel has a capacity of 720.0 liters (190 US gallons, 158 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.

Theoretical Maximum Hull Speed

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 7.8 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 Broom 10.70 Sceptre is about 253 kg/cm, alternatively 1419 lbs/inch.
Meaning: if you load 253 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 1419 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 Broom 10.70 Sceptre is 2.88.

Compared with other similar motor boats it is more spacy than 79% of all other designs. It seems that the designer has chosen a significantly more spacy hull design.

Curiosities

Powerboat?

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

According to this definition this boat is categorized as a Powerboat.

Maintenance

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 Broom 10.70 Sceptre 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.