Apollo 7's Service Propulsion System engine, rated at 20,500 pounds of thrust, fired eight times as planned during the mission.
Sources
- The Flight (and Fights) of Apollo 7 - Smithsonian Magazine (smithsonianmag.com)
- https://www.nasa.gov/missions/apollo/apollo-7/apollo-7-launched-as-race-to-moon-reached-final-stretch/ (nasa.gov)
- https://www.honeysucklecreek.net/msfn_missions/Apollo_7_mission/hl_apollo7.html (honeysucklecreek.net)
- https://www.nasa.gov/history/50-years-ago-apollo-7-ends-101-successful (nasa.gov)
- http://www.astronautix.com/a/apollo7.html (astronautix.com)
- https://www.thisdayinaviation.com/tag/apollo-7/ (thisdayinaviation.com)