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Apogee Motors


400 N Bipropellant Apogee Motors

For apogee orbit injection of geostationary satellites and for trajectory and planetary orbit manoeuvres of deep space probes.

400 N bipropellant apogee motors.

400 N Bipropellant Apogee Motors

Since 1974, the bipropellant apogee motors of Airbus Space Systems have controlled numerous international satellites, spacecraft and deep space probes with 100% success. During that time, multiple refinements have been implemented to further increase performance and reliability whilst maintaining low production costs.

Off-the Shelf Apogee Engines

Two models of 400 N apogee engine are available off-the-shelf with almost identical performance. The main criterion for selecting a particular model is the available volume in the spacecraft for accommodating the engine.

 

The difference between the two models is the size of the expansion nozzle. Model S400-15 is equipped with a larger nozzle and therefore operates at 1% higher efficiency than the smaller model S400-12.

 

Both models are available with propellant valves from either a US supplier, or from ASL, depending on customer's requirements. When fitted with the ASL valve, the engine becomes an all European product.

Systems Flow Rate Calibration

Apogee motor thrust frame and heat shield.
Apogee motor with integrated heat shield and thrust frame

All apogee motors are provided with trimming orifices upstream of the propellant control valves. This feature allows for individual adjustment of the propellant flow rate according to the systems design pressure.

Thermal Control

If required, the thruster can be fitted with heaters and thermistors for thermal control.

Apogee Motor Accessories

Standard motor accessories are available, including a nozzle heat shield kit and thrust frame. We also produce dedicated, tailor-made accessories for our existing regular customers.

Complete Propulsion Systems

Our 400 N apogee motors can be supplied as part of a complete unified propulsion system with every back-up, test and support service that you would expect from the European propulsion specialists.

 

 

 

Model No S400 - 12
Specific Impulse 318 sec

Bipropellant Apogee Motor Model S400-12
Model No S400 - 15
Specific Impulse 321 sec

Bipropellant Apogee Motor Model S400-15
Dimensions:
Elevation
Plan
Dimensions:
Elevation
Plan

 

 

 

400 N Bipropellant Apogee Motor Characteristics
Characteristics Model S400-12 Model S400-15
Thrust, Nominal 420 N 425 N
Thrust Range 340 - 440 N 340 - 440 N
Specific Impulse at Nominal Point 318 s 321 s
Flow Rate, Nominal 135 g/s
Flow Rate, Range 110 - 142 g/s
Mixture Ratio, Nominal 1.65
Mixture Ratio, Range 1.50 - 1.80
Chamber Pressure, Nominal 10 bar
Inlet Pressure Range 12.5 - 18.5 bar
Throat Diameter (inner) 16.4 mm
Nozzle End Diameter (inner) 244 mm 292 mm
Nozzle Expansion Ratio (by area) 220 330
Mass Engine with Valve 3.60 kg 4.30 kg
Qualified Single Burn Life 1.1 hours 1.85 hours
Qualified Accumulated Burn Life 8.3 hours 8.5 hours planned
Qualified Cycle Life 100 cycles 135 cycles planned

Chamber/Throat Material Platinum Alloy
Injector Type Double Cone Vortex
Cooling Control Film and Radiative
Propellants:
- Fuel
- Oxidiser

MMH
N2O4, MON-1, MON-3
Valve Solenoid single seat, double coil voltage 21 to 27 v.
Power: 35 W per coil bi-stable, US Supplier
Valve Supplier 1) US Supplier, or
2) Airbus Space Systems.
Mounting Interface to Spacecraft Valve flange with 4 feedthrough holes of 6.6 mm diameter
Tubing Interface per MS 33656-4
Valve Lead Wires 24 AWG per MIL-W-81381
Thruster Heater and Thermal Sensor On request

 

 

 

HERITAGE: 400 N Bipropellant Motors
Spacecraft Launch
Symphonie 1 1974
Symphonie 2 1975
TV-Sat 1 1987
TDF-1 1988
Galileo 1989
Tele X 1989
DFS Kopernikus 1 1989
TV-Sat 2 1989
DFS Kopernikus 2 1989
TDF-2 1990
Eutelsat 2-F1 1990
Eutelsat 2-F2 1991
Eutelsat 2-F3 1991
Arabsat 1C 1992
Eutelsat 2-F4 1992
DFS Kopernikus 3 1992
Eutelsat 2-F5 1994
Turksat 1A 1994
Turksat 1AR 1994
Turksat 1B 1994
HotBird 1 1995
Amos 1 1995
Arabsat 2A 1996
Turksat 1C 1996
Arabsat 2B 1996
Nahuel 1A 1997
Thaicom 3 1997
Sirius 2 FM1 1997
Sinosat 1998
Eutelsat W2 1998
GE 5 1998
Arabsat 3A 1999
Spacecraft Launch
Eutelsat W3 1999
Hispasat 1C 2000
Eutelsat W4 2000
Cluster FM 6, FM 7 2000
Cluster FM 5, FM 8 2000
Amsat P3D 2000
Eurasiasat 2001
Sicral 2001
Eurobird 2001
Artemis 2001
Atlantic Bird 2 2001
Atlantic Bird 3 2002
Atlantic Bird 1 2002
HotBird 6 2002
Meteosat SG 1 2002
Hispasat 1D 2002
Eutelsat W5 2002
Astra 1K 2002
Mars Express 2003
AMC 9 2003
Amos 2 2003
Apstar 6 2005
AMC 12 2005
AMC 13 2005
MSG FM2 2005
Syracruse 3A 2005
Venus Express 2005
HB7A, APA2 2006
Koreasat 5 2006
Syracuse 3B FM2 2006
THAICOM 5 2006
Chinasat 6B 2007
Spacecraft Launch
Galaxy 17 2007
Rascom RC1 2007
Star One C1 2007
Chinasat 9 2008
CIEL 2 2008
Star One C2 2008
Turksat 3A 2008
Eutelsat W3A 2009
Eutelsat W7 2009
Comsat-Bw 1 2009
Palapa D 2009
SICRAL2 (1B) 2009
Thor-6 2009
Eutelsat W3B 2010
Comsat-Bw 2 2010
Nilesat 201 2010
RASCOM QAF 1R 2010
Eutelsat W3C 2011
MSG FM3 2011
Apstar 7A 2012
Apstar 7B 2012
Eutelsat W6A 2012
Alphasat 2013
MSG FM4 2013
AMOS 4 2013
ARSAT 2014
   
   
   
   
   
   

 

 

Bipropellant Thruster Brochure (PDF)

PDF Brochure - Bipropellant Thrusters

 

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