Only about 40 seconds after initiation of the flight sequence, at an altitude of about 3700 m, the launcher veered off its flight path, broke up and exploded. ANALYSIS OF THE FAILURE 1. 37 seconds later, the rocket flipped 90 degrees in the wrong direction, and less than two seconds later, aerodynamic forces ripped the boosters apart from the main stage at a height of 4km. CONCLUSIONS Ariane 5's first test flight (Ariane 5 Flight 501) on 4 June 1996 failed, with the rocket self-destructing 37 seconds after launch because of a malfunction in the control software. A European mission to launch a satellite aboard Arianespace’s Vega rocket has come to a premature end after a “major anomaly” occurred just two minutes after liftoff… 3.1 FINDINGS The software was originally written for the Ariane 4 where efficiency consider… On June 4th, 1996, the very first Ariane 5 rocket ignited its engines and began speeding away from the coast of French Guiana. 1.1 GENERAL DESCRIPTION In general terms, the Flight Control System of the Ariane 5 is... 3. A data conversion from 64-bit floating point value to 16-bit signed integervalue to be stored in a variable representing horizontal bias caused a processor trap (operand error) because the floating point value was too large to be represented by a 16-bit signed integer. THE FAILURE The launch, which took place on Tuesday, 4 June 1996, ended in failure due to multiple errors in the software design: Dead code (running, but purposeful so only for Ariane 4) with inadequate protection against integer overflow led to an exception handled inappropriately—halting the whole inertial navigation … The Board … On the basis of the documentation made available and the information presented to... 2. On 4 June 1996, the maiden flight of the Ariane 5 launcher ended in a failure. Cluster was a constellation of four European Space Agency spacecraft which were launched on the maiden flight of the Ariane 5 rocket, Flight 501, and subsequently lost when that rocket failed to achieve orbit. 2.1 CHAIN OF TECHNICAL EVENTS

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