Limit load

The nominal or limit load B_n is the load which should only occur once (or only a very few times) during the lifetime of an aircraft.

The limit load can be found relatively easily by statistically analysing the data collected during the many hours of logged flights (which is continuously being gathered).

B_n may therefore only occur once during (e.g.) 60,000 hours of flying.

• should only occur once (or only a very few times) during the lifetime of an aircraft
• no plastic deformation allowed at this level of a load

See also

• Ultimate load