Joint Army Navy NASA Air Force | Interagency Propulsion Committee
Committees > JANNAF Technical > Liquid Propulsion (LPS)

Liquid Propulsion (LPS) Subcommittee

Technical Objectives

The charter of the Liquid Propulsion Subcommittee addresses technical problems and issues of greatest national needs associated with liquid engine systems. Topics include technology, components and engines of main propulsion, divert and attitude control, reaction control and post boost systems applied to tactical, ballistic missile defense and strategic, engines for, small launch vehicles, hybrid engines, and access to space propulsion.



Liquid propulsion technology issues examined include overall engine system, thrust chamber assembly components, and propellant feed systems. Component issues that may be examined include liquid engine systems such as thruster assembly and thrust vector control; liquid combustion elements such as the thrust chamber and gas generator/preburner; and liquid propellant feed systems such as turbomachinery, lines, ducts, valves, tanks, and pressurization systems. Fuel types include liquids, slurries, gels, endothermics, and cryogenics. Characterization of system and component performance is done through analysis, modeling and simulation, and engine testing validation.

  • Liquid Engine System
    • System Analysis & Trades – Industry accepted codes including design trade methods, cost
      models, upper stage design tools, model validation methods and criteria. Power balance
      codes, modeling of hydrostatic bearings and trans analysis were identified of particular
    • Health Management & Controls – Instrumentation standards, pre-launch engine operations
      and control systems
    • Test – Component, engine and integrated propulsion/vehicle best test practices, life and
      qualification testing
    • Advanced Materials – Development of materials, manufacturing, applications and test
  • Liquid Combustion Associated with Engine Subsystems and Components
    • Thrust Chambers Assembly
    • Propellants and Fuels (liquids, slurries, gels, endothermics, and cryogenics)
  • Liquid Propellant Feed and Pressurization Systems
    • Turbomachinery
    • Feed/Pressurization Systems – lines, ducts, valves, and tankage
  • Tactical Liquid and Gel Propulsion Systems


Mission Areas

  1. Liquid Engine Systems
  2. Liquid Combustion Subsystems and Components
  3. Liquid Propellant Feed and Pressurization Systems
  4. Advanced Materials for Liquid Propulsion Applications

Click here for descriptions of each mission area.


JHU/WSE ERG Technical Representative

Mr. Benjamin Hill-Lam, JHU/WSE ERG, Columbia, MD