LEROS 2b Apogee Engine
The Nammo Space designed and manufactured 319.5 second Isp, MON/Hydrazine apogee engine delivers a thrust of 420 N.
The LEROS 2b has flown on the NRL Mitex Mission and the 2019 SpaceIL/IAI Beresheet lunar Lander mission. The LEROS 2b for the Beresheet mission utilized an innovative Additive Manufactured support structure / heatshield. The engine successfully performed the orbit raising and lunar orbit insertion maneuvers.
This is a cost-efficient, high performance bipropellant engine. The base material for the thrust chamber and expansion cone is C103 Niobium alloy, coated with R512E Disilicide for oxidation protection. All Nammo apogee engines are hot-fire tested in the UK National Space Propulsion Test Facility at Nammo Westcott. Delivery timescales are typically 12-18 months.
Typical Application
Apogee engine or Main delta V engine
Typical Operational Mode
Long duration burns, Pulsing capability/Modulated firing capability
Propellant
MON/MMH
Thrust Range
83 lbf to 103 lbf
Thrust, nominal inlet pressure
95 lbf at nominal inlet pressure
Mixture Ratio Range
Oxidiser to Fuel
Mixture Ratio
Oxidiser to Fuel, at nominal inlet pressure
Specific Impulse
318.5 seconds at 15.4 bara [223 psia]. 320 seconds at 17 bara [246 psia]
Total Impulse
12,000,000 Ns minimum
Propellant Throughput
> 8,818 lb
Inlet Pressure
223 psia nominal
Inlet Pressure Range
196 psia to 260 psia
Restarts
With the chamber temperature starting at 100°C [212°F] finishing at 1,300°C [2,372°F]
Maximum Duration Single Firing
Demonstrated in qualification
Cumulative Duration
Demonstrated in qualification
Mass
11 lb
Nominal Operating Temperature
2,462°F
Propellant Temperature
+39°F to +104°F
Storage Temperature
-63.4°F to +149°F
Storage Life
4 years
Operational Life
19 years
Reliability
0.995
Valve Type
The thruster can be connected fuel/oxidiser primary coils in parallel [24 Vdc] or in series [50 Vdc].
Qualified Valve Cycles
10,500 on/off cycles
Valve Voltage
Per coil
Technology Readiness Level
TRL9
Status
The LEROS 2b was successfully used for the SpaceIL Beresheet mission.
NAMMO UK WESTCOTT
GENERAL
- Dedicated, skilled space engineering team
- Experienced Assembly Integration and Test Team
- Cleanroom facility for space hardware
- Electron Beam Welding
- Experienced orbital and interplanetary propulsion solutions
TEST FACILITIES
- National Propulsion Test Facility, for thrusters up to 1.5kN
- High Altitude Propulsion Test Facility
- Attitude and Reaction Control Testing
- Small Thruster Test Facility
- Sea Level Test Facility
- Vibration and Resonance Testing
QUALITY
- Certified to AS9100
- Focused on customer needs
