Definition

Noun 1. A measure of structural stress in flight: In aeronautics, the load factor is the ratio of the total aerodynamic force (lift) acting on an aircraft to the aircraft's actual weight. It is a dimensionless number, often expressed in multiples of the gravitational constant "g," indicating the force experienced by the aircraft's structure and occupants. 2. A capacity utilization metric: In other fields like engineering, computing, or transportation, the load factor can represent the ratio of the average load to the peak or maximum possible load over a specific period, measuring efficiency or utilization.

Usage Examples

• Aeronautics:
  • During a sharp turn, the aircraft's load factor increased to 3g, meaning the wings were producing lift equal to three times the plane's weight.
  • The pilot must ensure maneuvers do not exceed the aircraft's maximum permissible load factor to prevent structural damage.
• General Engineering/Operations:
  • The power plant's load factor for the quarter was 75%, indicating good utilization of its generating capacity.
  • Airlines aim for a high passenger load factor to maximize revenue on each flight.

Advanced Usage

• Limit Load Factor: The maximum load factor an aircraft is designed to withstand without permanent deformation.
• Ultimate Load Factor: A higher load factor (often 1.5 times the limit load factor) that the structure must support without failure, incorporating a safety margin.
• Gust Load Factor: The increase in load factor caused by sudden wind gusts during flight.

Variants and Related Words

• Load (n/v): The weight or force carried or supported. To place a weight or burden onto something.
• Factor (n): A circumstance, fact, or influence that contributes to a result. In mathematics, a number or quantity that when multiplied with another produces a given number or expression.
• Utilization Factor: A related term often used interchangeably in non-aeronautical contexts to describe the ratio of actual output to potential output.

Synonyms

• G-load (specific to aeronautics)
• Stress factor (in structural contexts)
• Utilization rate (in operational contexts)

Related Phrases

• To pull g's: A pilot's phrase meaning to subject the aircraft and oneself to a high load factor (e.g., "The fighter pilot pulled 6 g's in the dive.").
• Design load factor: The load factor for which an aircraft's structure is primarily designed.

Noun

1. (aeronautics) the ratio of an external load to the weight of the aircraft (measured in g)