TR501 Dual-Mode Thruster
The TR501 DMT is the first truly dual-mode thruster to be flight qualified for both bipropellant and monopropellant modes.
TR501 Dual-Mode Thruster
The TR501 DMT is the first truly dual-mode thruster to be flight qualified for both bipropellant and monopropellant modes. Patented by Northrop Grumman in 1995, its wide mixture ratio range makes it optimal for all systems including blow-down systems.
This DMT offers a combination of high Isp (specific impulse) for delta-V and high reliability for attitude control, while maintaining system simplicity and robustness. Over 55 TR501 DMT thrusters have been built to date, with more in production.
TR501 DMT is a 5-to-11 lbf regeneratively cooled, high-performance, N2H4/N2O4 Multipurpose Thruster for:
- Station keeping
- Thrust-vector control
- Attitude control
- Orbit insertion
- Change in orbit
- Propellant depletion
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R501 DMT Performance
Performance in Bipropellant Mode:
- 315 seconds at MR of 1.0, thrust level of 11.5 lbf.
- 305 seconds at MR of 1.3, thrust level of 7.6 lbf.
- 292 seconds at MR of 1.4, thrust level of 4.8 lbf.
Total Throughput:
- 858 lbs Qual Thruster 1
- 878 on Qual Thruster 2
Longest Single Firing:
- 15,640 in blowdown mode.
- 6,000 seconds fixed thrust.
Propellant Temperatures: 50 – 148°F
Flight programs: GeoLITE, JWST, Restricted.
