RFA Explains How Its UK Rocket Engine Test Led to Monday's Spectacular Explosion

Monday brought spectacular footage of an explosion at a UK rocket test site after an engine test went awry. The plan had been to test-fire all of a rocket stage's nine engines at the same time — they've successfully ignited the mores more than a hundred times — but this time one of the first eight had an "unusual" anomaly — "most likely a fire in the oxygen pump," according to a video posted by space company RFA on X.com.
The trouble "spread onto neighboring engines," eventuall