LR105

An LR105 Atlas sustainer engine on display at the Air Zoo.

The LR105 is a liquid-fuel rocket engine that served as the sustainer engine for the Atlas rocket family.[1][2][3] Developed by Rocketdyne in 1957 as the S-4,[4][5][6] it is called a sustainer engine because it continues firing after the LR89 booster engines have been jettisoned, providing thrust during the ascent phase.[7]

  1. ^ Wade, Mark (2019). "LR105-3". Encyclopedia Astronautica. Retrieved 2024-10-12.
  2. ^ "Convair SM-65 Atlas". National Museum of the US Air Force.
  3. ^ McCutcheon, Kimble D. (2022). "U.S. Manned Rocket Propulsion Evolution - Part 5: The Atlas Missile". Aircraft Engine Historical Society. Retrieved 2024-10-12.
  4. ^ Bilstein, Roger E. (August 1999). Stages to Saturn: A Technological History of the Apollo/Saturn Launch Vehicle. DIANE Publishing. p. 119. ISBN 978-0-7881-8186-3.
  5. ^ Wade, Mark (2019). "S-4 engine". Encyclopedia Astronautica. Retrieved 2024-10-12.
  6. ^ Wade, Mark (2019). "Rocketdyne". Encyclopedia Astronautica. Retrieved 2024-10-12.
  7. ^ Swopes, Bryan (2024-08-27). "Rocketdyne LR105-NA-5 | This Day in Aviation". Retrieved 2024-10-12.