Results and analysis from reduced gravity experiments of the flexible membrane commode apparatus

Z. G. Yuan*, U. Hegde, D. Althausen, J. MacKey, N. Hall, W. Duval, R. Alba, Eric Litwiller, J. Hogan, T. Liggett, R. Devaney, T. Fox, J. Rask, K. Wignarajah, J. Fisher

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review


Two separate experimental rigs used in tests on NASA and Zero-G Corporation aircrafts flying low-gravity trajectories, and in the NASA 2.2 Second Drop Tower have been developed to test the functioning of the Flexible Membrane Commode (FMC) concept under reduced gravity conditions. The first rig incorporates the flexible, optically opaque membrane bag and the second rig incorporates a transparent chamber with a funnel assembly for evacuation that approximates the size of the membrane bag. Different waste dispensers have been used including a caulking gun and flexible hose assembly, and an injection syringe. Waste separation mechanisms include a pair of wire cutters, an iris mechanism, as well as discrete slug injection. The experimental work is described in a companion paper. This paper focuses on the obtained results and analysis of the data. While aspects such as bag deployment, handling, and removal as well as waste injection and separation are evaluated, the primary focus is on the trajectory and containment of the injected waste, and comparisons with modeling.

Original languageEnglish (US)
StatePublished - Dec 1 2009
EventInternational Conference on Environmental Systems, ICES 2009 - Savannah, GA, United States
Duration: Jul 12 2009Jul 12 2009


OtherInternational Conference on Environmental Systems, ICES 2009
Country/TerritoryUnited States
CitySavannah, GA

ASJC Scopus subject areas

  • Automotive Engineering
  • Safety, Risk, Reliability and Quality
  • Pollution
  • Industrial and Manufacturing Engineering


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