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Object

Système de Référence Inertielle

A circular mechanical device with intricate metal components and a central hub, likely representing an inertial reference system used in Ariane launchers to measure attitude and motion.

The inertial reference system on Ariane launchers, responsible for measuring the vehicle's attitude and motion using gyroscopes and accelerometers. The SRI on Ariane 5 Flight 501 was a direct hardware and software heritage from Ariane 4. Both the primary and backup units halted within milliseconds of each other when an internal alignment routine attempted to convert an out-of-range horizontal velocity.

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