- Elon Musk on Twitter: Raptor liberated its oxygen turbine stator (appears to be mechanical, not metal combustion failure), so we need to update the design & replace some parts. Production is ramping exponentially, though. SN6 almost done. Aiming for an engine every 12 hours by end of year. https://twitter.com/elonmusk/status/1143019549492744203 381 comments spacex