DocM Posted August 18, 2016 Author Share Posted August 18, 2016 (edited) "scorch" = ablated TPS, often cork. There is no igniter. Pyrophoric fluids, TEA-TEB, are injected internally and they spontaneously ignite on contact with the LOX vapors and LOX from engine chill-down and spin-up. Unobscured Vision 1 Share Link to comment Share on other sites More sharing options...
Unobscured Vision Posted August 18, 2016 Share Posted August 18, 2016 1 minute ago, DocM said: "scorch" = ablated TPS, often cork. There is no igniter. Pyrophoric fkuids, TEA-TEB, are injected internally and they spontaneously ignite on contact with the LOX vapors and LOX from engine chill-down and spin-up. It was my understanding that SpaceX used a single igniter in the center of the Octaweb to start the whole show? Hmm. Okee doke. Link to comment Share on other sites More sharing options...
DocM Posted August 18, 2016 Author Share Posted August 18, 2016 (edited) The green glow on launch ignition is the TEA-TEB flashing over, and it sets off the RP-1. There is a single TEA-TEB circuit for the center and 2 opposite Octaweb engines, so they all flash over for ignition at reentry etc. but only those engines which have been chilled down, spun up and have their prop valves open actually start. Draggendrop 1 Share Link to comment Share on other sites More sharing options...
Draggendrop Veteran Posted August 19, 2016 Veteran Share Posted August 19, 2016 SpaceX - Grid Fin Inspection - JCSAT16 - YouTube 4K 08-18-2016 video is 7:48 min. New images on Flickr... https://www.flickr.com/photos/spacex/ Unobscured Vision 1 Share Link to comment Share on other sites More sharing options...
Recommended Posts