The Ariane 5 actually had a flatter trajectory than the Ariane 4, causing the horizontal speed component to be higher than expected by the original Ariane 4 code. A failure that is at least as interesting and vital is that it was agreed on project level not to remove or retest the Ariane 4 code in question and that's how it ended up in Ariane 5. (it's all in the original Ariane 5 failure report)
The Ariane 5 actually had a flatter trajectory than the Ariane 4, causing the horizontal speed component to be higher than expected by the original Ariane 4 code. A failure that is at least as interesting and vital is that it was agreed on project level not to remove or retest the Ariane 4 code in question and that's how it ended up in Ariane 5. (it's all in the original Ariane 5 failure report)
The Ariane 5 actually had a flatter trajectory than the Ariane 4, causing the horizontal speed component to be higher than expected by the original Ariane 4 code. A failure that is at least as interesting and vital is that it was agreed on project level not to remove or retest the Ariane 4 code in question and that's how it ended up in Ariane 5. (it's all in the original Ariane 5 failure report)