A310 Loses Rudder, Prompts Fleetwide Inspections, Inquiry

Air Safety Week, March 21, 2005

March 21, 1992: Large section of upper rudder lost at twice speed of sound.

Jan. 4, 1991: Portion of upper rudder separates during London -- New York flight.

April 12, 1989: Part of upper rudder detaches at 44,000 feet.

Source: UK AAIB

Hookes Law

The principle that the stress applied to stretch or compress a body is proportional to the strain or to the change in length thus produced, so long as the limit of elasticity of the body is not exceeded.

Source: www.answers.com/topic/hooke-s-law

Young's Modulus

Within the limits of elasticity, the ratio of the linear stress to the linear strain is termed the modulus of elasticity, or Young's Modulus, and may be written Young's Modulus, or E = (Stress/Strain). It is this property that determines how much a bar will sag under its own weight or under a loading when used as a beam within its limit of proportionality.

Source: metals.about.com/od/metalterminology/l/bldefyoungsmodu.htm

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