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The Rocketdyne LR89 was a liquid-fueled rocket engine developed in the 1950s by Rocketdyne, a division of North American Aviation. It was designed to serve...

S-4, it is called a sustainer engine because it continues firing after the LR89 booster engines have been jettisoned, providing thrust during the ascent...

selected for the competitor Air Force Thor missile. An even larger design, the LR89/LR105, was used on the Atlas missile. The Thor had a short military career...

upgraded version using the LR89 rocket engine being developed by Rocketdyne for the Air Force's Atlas missile project. Using the LR89 and adding a second stage...

LR36 (AR1) Rocketdyne LR42 (AR2) Rocketdyne LR64 Rocketdyne LR79 Rocketdyne LR89 Rocketdyne LR101 Rocketdyne LR105 Rocketdyne Aeolus Rocketdyne A-7 Redstone...

the Redstone using the LR89 and adding a second stage, stretching the range to 1,900 km (1,200 mi). But ongoing work on the LR89 suggested that the engine...

turbopump (Atlas B, C) 1 × Rocketdyne LR-105 sustainer rocket engine, 2 × LR89 booster engines with independent turbopumps each 165,000 lbf (730 kN) (Atlas...

Mauna Kea Obs. (568) 46 other TNO 39.1 0.06 20 36.8 41.3 — MPC · JPL 2016 LR89 9 June 2016 Mauna Kea Obs. (568) 48 other TNO 34.9 0.03 8 33.9 35.9 — MPC ·...