NASA Langley Research Center
Hampton, Virginia

Materials

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Responsible Parties: Page Content: William H. Kinard Page Construction: Thomas H. See

A wide variety of seals and lubricants were flown on LDEF. Analysis of such materials was, in general, not part of the Principal Investigators' original objectives, but became of interest due to the extended duration of the LDEF mission. In general, most seals and lubricants functioned as required, although some damage to the Experiment Exposure Control Canister (EECC) seals on the leading edge (Rows 8 and 9) was observed. In addition, cetyl alcohol, which was used as a lubricant on numerous bolts, had essentially evaporated by the end of the mission and many of these bolts seized upon attempted removal.

The following reports provide details of the investigations on LDEF seals and lubricants.

• H.W. Dursch, B.K. Keough, and H.G. Pippin, Evaluation of Seals and Lubricants Used on the Long Duration Exposure Facility, NASA CR-4604, June 1994.
  
  
• H.W. Dursch, G. Bohnhoff-Hlavacek, D. Blue, and P. Hansen, Analysis of Systems Hardware Flown on LDEF - New Findings and Comparisons to Other Retrieved Spacecraft Hardware, NASA CR, 1995.
  
  
• H.W. Dursch, W.S. Spear, E.A. Miller, G.L. Bohnhoff-Hlavacek, and J. Edelman, Analysis of Systems Hardware Flown on LDEF - Results of the Systems Special Investigation Group, NASA CR-189628, April 1992.

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