Definition

Noun: - The vertical, flat, or curved component of a rudder that extends into the water. It is the primary surface that, when turned, creates hydrodynamic or aerodynamic forces to steer a boat, ship, or aircraft by deflecting the flow of water or air.

Usage

The term "rudder blade" refers specifically to the main, operative part of the rudder assembly. It is a technical term used in nautical and aeronautical contexts. - The rudder blade is attached to the rudder stock or post. - A damaged rudder blade can severely compromise a vessel's steering. - The efficiency of steering depends on the size and shape of the rudder blade.

Examples

• The shipyard workers inspected the rudder blade for signs of corrosion.
• In strong currents, the force on the rudder blade can be immense.
• The yacht's design features a balanced rudder blade for easier handling.

Advanced Usage

• "To feather the rudder blade": In sailing, to adjust the angle of the rudder blade to reduce drag or improve performance when not actively steering.
• The concept is central to discussions on rudder blade area, rudder blade aspect ratio, and rudder blade torque.

Variants and Related Words

• Rudder (noun): The complete steering device, which includes the rudder blade, stock, and fittings.
• Rudderpost / Rudder stock (noun): The shaft or pivot to which the rudder blade is attached.
• Skeg (noun): A fin or projection that often supports or protects the rudder blade.

Synonyms

• Rudder plane (less common, used in some technical descriptions).
• Rudder foil.

Notes

• "Rudder blade" is often a single, solid component, but on some vessels (like certain sailboats with retractable rudders), it may be detachable.
• It is a compound noun where "blade" specifies the part of the "rudder." The term is used as a single conceptual unit in technical language.

Noun

1. the vertical blade on a rudder