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N2O4/Aerozine-50
N2O4/Aerozine-50 propellant. Nitrogen tetroxide became the storable liquid propellant of choice from the late 1950's. Aerozine was a 50-50 mixture of hydrazine and UDMH developed for use in the Titan missile family; it had a higher boiling point than UDMH. This propellant combination was copied in one Russian missile but otherwise straight UDMH was used in Russia.

Oxidizer Density: 1.450 g/cc. Oxidizer Freezing Point: -11 deg C. Oxidizer Boiling Point: 21 deg C. Fuel Density: 0.903 g/cc. Fuel Freezing Point: -7 deg C. Fuel Boiling Point: 70 deg C.



Subtopics

AJ10-118K Aerojet N2O4/Aerozine-50 rocket engine. Pressure-fed engine, optimized for altitude operation, used in Delta K stage from 1989. Not regeneratively cooled; used a rubber modified silica phenolic ablative at the combustion flame front.

AJ10-131 Aerojet N2O4/Aerozine-50 rocket engine. Subscale Apollo SPS. Subscale Apollo SPS

AJ10-137 Aerojet N2O4/Aerozine-50 rocket engine. Apollo SPS. Out of Production. Pressure-fed engine. Used as Apollo SM engine.

AJ10-138 Aerojet N2O4/Aerozine-50 rocket engine. Out of production. Originally developed for Vanguard and Able. Two used, thrust uprated from 3540 kgf to 3628 kgf, with higher specific impulse, in Transtage. Flown 1964-1980.

Apollo LM American manned lunar lander.

Apollo LM AS American manned spacecraft module. 10 launches, 1968.01.22 (Apollo 5) to 1972.12.07 (Apollo 17).

Apollo LM DS American manned spacecraft module. 10 launches, 1968.01.22 (Apollo 5) to 1972.12.07 (Apollo 17).

Apollo LM Shelter American manned lunar habitat. Cancelled 1968. The LM Shelter was essentially an Apollo LM lunar module with ascent stage engine and fuel tanks removed and replaced with consumables and scientific equipment for 14 days extended lunar exploration.

Apollo LM Taxi American manned lunar lander. Cancelled 1968. The LM Taxi was essentially the basic Apollo LM modified for extended lunar surface stays.

Apollo LM Truck American lunar logistics spacecraft. Cancelled 1968. The LM Truck was an LM Descent stage adapted for unmanned delivery of payloads of up to 5,000 kg to the lunar surface in support of a lunar base using Apollo technology.

Ares engine Aerojet N2O4/Aerozine-50 rocket engine. SSTO ICBM. Development 1968. Advanced Rocket Engine System - single shaft turbopump, integrated single pressure vessel in a staged combustion cycle configuration.

Astris N2O4/Aerozine-50 propellant rocket stage. .

Astris engine German N2O4/Aerozine-50 rocket engine. Used on Europa launch vehicle. First flight 1964.

Astrorocket-1 N2O4/Aerozine-50 propellant rocket stage. Delta wing configuration. LR87-derivative engines.

Astrorocket-2 N2O4/Aerozine-50 propellant rocket stage. X-20 Dynasoar configuration. LR87-derivative engines.

Barbarian MM-1 N2O4/Aerozine-50 propellant rocket stage. All values roughly estimated based on number of engines and diameter given.

Barbarian MM-2 N2O4/Aerozine-50 propellant rocket stage. All values roughly estimated based on number of engines and diameter given.

Delta K N2O4/Aerozine-50 propellant rocket stage. .

Delta P N2O4/Aerozine-50 propellant rocket stage. .

Expansion-Deflection 10k Rocketdyne N2O4/Aerozine-50 rocket engine. Expansion-Deflection Booster (10,000 lb thrust). Pressure-fed. Thrust and specific impulse values are at sea level.

Expansion-Deflection 50k Rocketdyne N2O4/Aerozine-50 rocket engine. Expansion-Deflection Booster (50,000 lb thrust). Pressure-fed. Thrust and specific impulse values are at sea level.

LE-3 Rocketdyne N2O4/Aerozine-50 rocket engine. MHI(Japan)/Rocketdyne Upper Stage. Pressure-fed.

LR87-11 Aerojet N2O4/Aerozine-50 rocket engine. Out of production. Powered Titan 3 and 4 first stages. Replaced the -9 model, first flown 1968. First flight 1964.

LR87-11 AJ23-138 Aerojet N2O4/Aerozine-50 rocket engine. Version of LR-87-11 tuned for launch pad ignition when used on Titan 3B. First flight 1966.

LR87-5 Aerojet N2O4/Aerozine-50 rocket engine. Out of Production. Used on Titan 2 launch vehicle. Engines refurbished for space launcher versions from decommissioned missiles between 1974-1982.

LR87-7 Aerojet N2O4/Aerozine-50 rocket engine. Study 1961. Version of LR-87-5 used on Gemini Titan 2 launch vehicle. Proposed for unflown Titan 3L2, Titan 3L4 boosters. First flight 1962.

LR87-9 Aerojet N2O4/Aerozine-50 rocket engine. Variant of LR-87 used on early versions of Titan III B,C First flight 1966.

LR87plus Aerojet N2O4/Aerozine-50 rocket engine. Study 1965. Nominal improved LR87 in booster studies. Used on Martin Astrorocket launch vehicle.

LR91-11 Aerojet N2O4/Aerozine-50 rocket engine. Out of production. Second stage engine for Titan 3 and 4. First flight 1968.

LR91-5 Aerojet N2O4/Aerozine-50 rocket engine. Titan 2 ICBM Stage 2. Out of Production. Scaled down version of stage 1 engine featuring fixed single chamber. Gas generator cycle. First flight 1962.

LR91-7 Aerojet N2O4/Aerozine-50 rocket engine. Version used on Stage 2 of Gemini Titan 2 Launch Vehicle. Proposed for unflown Titan 3L2, Titan 3L4 boosters. First flight 1962.

LR91-9 Aerojet N2O4/Aerozine-50 rocket engine. Titan III B, C, D. Out of Production. Version used in earlier versions of Titan 3 upper stages. First flight 1965.

P-7 Rocketdyne N2O4/Aerozine-50 rocket engine. Aspen Booster. Pressure-fed. Thrust from 12,000 lb to 50,000 lb at sea level.

R-56 Block K N2O4/Aerozine-50 propellant rocket stage. Empty mass estimated (rounded figures given in source material indicates impossible 9 metric tons gross with 8.7 metric tons propellant).

RD-280 Glushko N2O4/Aerozine-50 rocket engine. Experimental engine. Study 1961. Experimental engine using Aerozine 50 (50% UDMH + 50% hydrazine) as fuel.

RM-100T Rocketdyne N2O4/Aerozine-50 rocket engine. Lunar Flyer. Pressure-fed.

RS-18 Rocketdyne N2O4/Aerozine-50 rocket engine. Apollo Lunar Ascent Module Engine. Pressure-fed.

SE-10 Rocketdyne N2O4/Aerozine-50 rocket engine. Lunar Module Descent. Pressure-fed. Thrust throttleable 1050-10,500 lbs vac. First flight 1968.

SE-9-3 Rocketdyne N2O4/Aerozine-50 rocket engine. Titan III Transtage. Pressure-fed. System included two modules of three engines plus two additional SE-9-5 separate engines, tanks, and a pressurization system. First flight 1964.

SE-9-5 Rocketdyne N2O4/Aerozine-50 rocket engine. Titan III Transtage. Pressure-fed. System included two modules of three engines plus two additional SE-9-5 separate engines, tanks, and a pressurization system. First flight 1964.

Titan 2-1 N2O4/Aerozine-50 propellant rocket stage. .

Titan 2-2 N2O4/Aerozine-50 propellant rocket stage. .

Titan 3A-1 N2O4/Aerozine-50 propellant rocket stage. .

Titan 3A-2 N2O4/Aerozine-50 propellant rocket stage. .

Titan 3B-1 N2O4/Aerozine-50 propellant rocket stage. .

Titan 3B-2 N2O4/Aerozine-50 propellant rocket stage. .

Titan 4-1 N2O4/Aerozine-50 propellant rocket stage. .

Titan 4-2 N2O4/Aerozine-50 propellant rocket stage. .

Titan LDC-1 N2O4/Aerozine-50 propellant rocket stage. 15 foot diameter core Titan proposed in 1960's for space station logistics. Masses estimated.

Titan LDC-2 N2O4/Aerozine-50 propellant rocket stage. 15 foot diameter core Titan proposed in 1960's for space station logistics. Masses estimated.

Titan Transtage Stretch N2O4/Aerozine-50 propellant rocket stage. 20% stretch of Transtage to handle geosynchronous insertion of larger payloads launched by Titan 3C7. Masses estimated.

TR-201 TRW N2O4/Aerozine-50 rocket engine. Apollo lunar module ascent stage engines. Surplus engines used on Delta P stage. First flight 1972.

Engines: AJ10-138, AJ10-131, LR87-7, LR91-7, LR91-5, SE-9-3, SE-9-5, LR87plus, RM-100T, LR87-11 AJ23-138, LR91-9, LR87-9, Astris engine, AJ10-137, AJ10-118K, Ares engine, Expansion-Deflection 10k, Expansion-Deflection 50k, LR87-11, LR91-11, LR87-5, LE-3, P-7, RD-280, RS-18, SE-10, TR-201. Spacecraft: Apollo LM, Apollo LM DS, Apollo LM AS, Apollo LM Shelter, Apollo LM Taxi, Apollo LM Truck. Stages: Astris, R-56 Block K, Barbarian MM-2, Barbarian MM-1, Titan 2-1, Titan 2-2, Astrorocket-1, Astrorocket-2, Titan 3A-1, Titan 3A-2, Titan 3B-1, Titan 3B-2, Titan LDC-1, Titan LDC-2, Titan Transtage Stretch, Delta P, Titan 4-1, Titan 4-2, Delta K, Titan Transtage.

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