Key Design Factors

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Cruising efficiency is most affected by:
Hull dimensions, hull form and weight distribution together with a design of stern that minimises the wake (or wash)
An efficient electric motor
Optimum propeller diameter and pitch
Sufficient deep-cycle battery capacity (especially if the craft is used for long periods)
David believes that these elements are the most important in giving him a cruising envelope of 3 knots x 24 hours in his design 'Terrapin'


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Created: December 2000.