Patent ID: 6523402
Filing Date: 2003-02-25
Classification: G01C

Abstract:
An attitude indicator device for allowing a pilot to determine an aircraft's attitude in the case of instrument or power failure, the attitude indicator device comprising:a housing member comprising an elongate first portion and an elongate second portion, each of said portions having a top surface and a bottom surface, longitudinal axes of each of said portions being oriented substantially perpendicular to each other; each of said portions of said housing member having walls defining an interior space; a plurality of spirit levels, each of said spirit levels being positioned in said interior space of one of said portions of said housing member, each of said spirit levels being visible through one of said inner faces; a longitudinal axis of each of said spirit levels being oriented substantially parallel to the longitudinal axis of said portion of said housing on which said spirit level is mounted such that at least two of said spirit levels are oriented perpendicular to each other to indicate relative orientation of an airplane with respect to level flight when said housing member is mounted in the airplane in an orientation that is substantially horizontal when the air plane is in level flight for providing the pilot with visual indications of pitch and roll conditions of the airplane and thereby permitting the pilot to maintain level flight without utilization of standard indicator instruments of the airplane.