Division of Aerojet-General specialized in small engines for maneuvering satellites or spacecraft. They are low power engines and the bipropellant ones have vacuum nozzles.

"Two HIPAT models"

-The bi-propellant HIPAT used N2O4 / MMH and are considered "Thrusters" of high performance apogee.

-The engine on the left has Dual Mode operation and 100 lbs. thrust, while the one on the right is a simple operation engine which also gives 100 lbs of thrust.

“R-4D, R-42 and R-40B”

-The R-4D was used in the Lunar Module (LM), also in the Italsat, Eurostar, LEASAT, Insat, etc. It delivers 110 lbs of thrust.

-The R-42 used the same propellants as mentioned above and gave 200 lbs. The R-40B was larger and delivered 900 lbs.

"R-1E with nozzles"

"R-1E  with inclined nozzle"

-The R-1Es that gave 25 lbs were designed by Marquardt (such as R-4D) and use the same head or chamber, varying the outlet nozzle.

-The ones with the inclined nozzle are mounted in the bow of the Space Shuttle, in order to steer the spaceship in the different maneuvers.

-The designs with monopropellant, together with Rocket Research (REA), are multiple, from the MR-103 with 0.2 lbs to the  MR-509 that delivers more than 600 lbs of thrust, etc.

“MR-50S”

-The monopropellant is hydrazine . The MR-50S with 5 lbs of thrust was used to control the attitude of spacecraft such as the Voyager, Intelsat 5, GPS, etc. The MR-80 gave 600 lbs of thrust.

“MR-80”

-The MR-103C engines are very small, delivering 0.2 lbs of thrust.

-Their way of working was giving combustion pulses that lasted little: 0.008 sec. but they were capable of producing 750,000 pulses.

“MR-103”

-The MR-104, gave around 100 lbs and was used by Voyager, Magellan, Shots, Landsat, etc.

“MR-104”

-We do not have any details of the MR-105. The MR-106E was used for speed and position correction with 5 lbs of thrust.

-Generally these small engines are considered OME or "Orbital Maneuvering Engine". The MR-107B with 40 lbs was used to correct spacecraft as well as the upper stages of rockets such as the Delta 2, Titan II, Commercial Titan, etc.

“MR-106”

“MR-107”

-The MR-111 with 0.5 lbs was used as maneuvering controller for the Intelsat 5, Radarsat, Mars Observer or Wind / Polar Landsat, etc.

“MR-111”

-The MR-120 was used almost exclusively in small ICBM missiles for trajectory correction. It gave 20 lbs of thrust.

“MR-120”

-MRM-122 has several engines grouped in different combinations with 30 lbs of thrust.

“MRM-122”

-The "500" series operate under different principles as the EHT, or "Electrothermal Hydrazine Thruster" for the HR-501B.

-They use the same S-205 catalyzer and gave only 0.06 lbs of thrust.

“MR-501B”

-The MR-502 is an enhanced EHT: IMP-EHT with similar power.

-It was used in the Astra 1B in 1991 and could eventually provide 430000 impulses.

-The low power MR-509 with approximately 50 mlbs of thrust ran on hydrazine by means of electric arc jet system.

“MR-509”

-Aerojet Redmond also manufactures low power plasma thrusters, using a Teflon bar. The PRS-101 is one of them.

-
“PRS-101”

-The little BPT-4000 engine operates under the "Hall Effect" principle and uses Xenon propellant.

"BPT-4000"

From appendix 9: Aerojet Redmond builds small maneuvering engines.

-50 KW
-BPT-2000
-BPT-4000
-BPT-600K
-ESEX Arcjet
-LPH Arcjet (MR-508)
-MR-103-C
-MR-103-D
-MR-103-G
-MR-104-AQ
-MR-106
-MR-107-C
-MR-107-E
-MR-111
-MR-120
-MR-50-S
-MR-50-T
-MR-501-B
-MR-502
-MR-508
-MR-509
-MR510
-MR-512
-MRM-103
-MRM-106
-MRM-122
-PRS-101