Читать книгу SELF-STEERING UNDER SAIL - Peter Foerthmann - Страница 16
ОглавлениеPower Consumption
The power consumption of an autopilot is determined not only by the rating of the model chosen but also by the following factors:
a. Length and displacement of the vessel
The more boat there is to move, the greater the power consumption.
b. Type of rudder
A keel-mounted rudder requires more force because it is impossible to balance. A rudder on a skeg can have a balance portion below the skeg and is therefore easier to steer. A fully balanced spade rudder without a skeg is lightest on the helm.
c. Speed with which corrective rudder movements must be made
This depends on how well the boat holds a course, and is therefore also influenced by its shape below the waterline.
d. Sail trim, weather helm
Poorly trimmed sails and continuous weather helm are always more of a drain on the autopilot than a well-balanced boat.
e. Sea conditions
Bigger seas and increased yawing require more frequent steering interventions by the autopilot.
f. Desired steering precision
The more exactly the course must be held, the greater the amount of work there is for the autopilot.
