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Aerojet Rocketdyne — MPS-120 CubeSat Propulsion

FO canceled at TRL 4→4, but MPS-100 product line developed commercially through parallel paths. Pattern: canceled FO, commercial product anyway.

Summary

Aerojet Rocketdyne's FO project 91362 demonstrated the MPS-120 CHAMPS (CubeSat High-impulse Adaptable Modular Propulsion System) — the world's first 3D-printed hydrazine integrated propulsion system for CubeSats. The FO project was canceled at TRL 4→4 in 2017 without advancing. However, the MPS-100 product line (MPS-120-1U, MPS-120-2U, MPS-130-1U, MPS-130-2U) was commercially developed via parallel paths: Aerojet IR&D investments and the NASA Small Spacecraft Technology Program (one of 10 payloads selected in August 2013). The MPS-120 is listed on SatCatalog and Satsearch as a commercially available product. This follows the same pattern as Busek BIT-3: FO canceled, but company had parallel support that enabled commercial development anyway.

PI: Steven R Overton
Confidence: suggestive (MPS-120 is commercially listed; FO attribution unclear given cancellation; no confirmed flight heritage found)

FO Project

Field Detail
Project ID 91362
Title Operational Demonstration of the MPS-120 CubeSat High-impulse Adaptable Modular Propulsion System
Period 2013-08-16 – 2017-10-16
Status Canceled
TRL 4→4 (target: 4)
TX area TX01.2.2: Electrostatic Propulsion (mislabeled — MPS-120 is hydrazine, not electrostatic)

Outcome anomaly: TechPort shows "Advanced To | 2010-01-13 | partner: Other" — a date 3+ years before the project started. This is the known FO outcome date error pattern (inherited from earlier program records). The actual outcome is "Canceled | 2017-10-16".

MPS-120 Technology

  • First 3D-printed hydrazine integrated propulsion system for CubeSats
  • Provides: primary propulsion + 3-axis attitude control in 1U volume
  • Contains: 4 miniature rocket engines, 3D-printed titanium piston, propellant tank, pressurant tank
  • Selective Laser Melting (SLM) and Electron Beam Melting (EBM) manufacturing
  • Target delta-V: >200 m/s for CubeSats

MPS-100 product line (commercially available as of ~2021): - MPS-120-1U (1.2 kg dry, hydrazine, 1U form factor) - MPS-120-2U (larger propellant load) - MPS-130-1U (cold gas alternative) - MPS-130-2U

Parallel Development Paths

The FO project cancellation (2017) did not stop MPS-120 development because:

  1. NASA Small Spacecraft Technology Program (Aug 2013): MPS-120 selected as one of 10 payloads — parallel NASA support independent of FO
  2. Aerojet IR&D investment: Company-funded development via internal research
  3. Defense connection: Aerojet had deep DoD relationships for CubeSat constellation propulsion

Aerojet Rocketdyne Status (2024+)

Aerojet Rocketdyne has faced consolidation pressure. The attempted L3Harris acquisition (announced Dec 2021) failed (FTC blocked, Feb 2023). The company remained independent but constrained. As of 2024-2025, Aerojet Rocketdyne continues operations as a standalone defense propulsion prime.

The MPS-100 product line exists in their SmallSat propulsion catalog but flight heritage for MPS-120 specifically (hydrazine CubeSat missions) was not confirmed in available sources.

Outcome Assessment

Dimension Finding
FO contribution Canceled (TRL 4→4) — additive manufacturing demo was in scope
Commercial product MPS-120 listed commercially (SatCatalog, Satsearch)
Flight heritage Not confirmed in available sources
Parallel paths NASA SSTP + IR&D enabled commercial development despite FO cancellation

Archetype: Large defense contractor uses FO as one of several parallel development channels. FO cancellation doesn't matter — other channels carried the technology. Very similar to Busek (also canceled FO, commercial thruster anyway), but Busek had confirmed mission flights (Artemis-1). MPS-120 flight heritage is unconfirmed.

Note: The TX01.2.2 (Electrostatic) taxonomy for a hydrazine system is a TechPort data error — MPS-120 is a chemical monopropellant, not electrostatic. Worth flagging as a taxonomy quality issue.

Cross-references