[The concept of functional strength in the problem of establishing objective biomechanical requirements for systems to protect and rescue aircraft crews].

This paper discusses problems related to the ambiguous formulation of biomechanical requirements for the quality of protection and rescue means. In order to objectivize these requirements, it is recommended to use the functional strength concept which reflects both mechanical (with specific features characteristic of biomechanical systems taken into account) and functional results of adverse effects. The paper also describes the potential use of this parameter in developing complex requirements for various programmed and contingent situations and probability aspects of the problem of evaluating protection and rescue means.