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Mechanical Systems Mechanical / Thermal Hardware July 2005 Status

Mechanical Systems Mechanical / Thermal Hardware July 2005 Status. Marc Campell, Subsystem Manager. SLAC Status. Grid Qual Static Load Test. Hardware Grid Box assembly is 99% complete All GSFC and Spectrum provided hardware is on hand Pre-Test (SLAC activities)

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Mechanical Systems Mechanical / Thermal Hardware July 2005 Status

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  1. Mechanical Systems Mechanical / Thermal HardwareJuly 2005 Status Marc Campell, Subsystem Manager

  2. SLAC Status

  3. Grid Qual Static Load Test • Hardware • Grid Box assembly is 99% complete • All GSFC and Spectrum provided hardware is on hand • Pre-Test (SLAC activities) • Test Interface Plate (TIP) Assembly delayed due to personnel conflicts with ACD operations – in work now • Need to return Spectrums Interface plate by mid-Sept. • Shipping container for Grid 2 on TIP due 9/7/05 • Test (NTS activity) • Component flexure test required to proof load flexures prior to integration with the Flight LAT on the Test Interface Plate has been added to NTS SOW • Test performed on TIP assembly prior to SLT • Flexure strain gages also characterized for LAT sine vibe testing • NTS has evaluated final load cases and additional test above and submitted delta cost proposal (+$XXK) which is still within original budget

  4. Grid Qual Static Load Test Schedule

  5. Drawing Release Plan • 66 of 73 (90%) drawings released • 3 MLI drawings (in work) • 4 unreleased parts not needed until Radiator fit check • Known drawing revisions

  6. Concerns • Lockheed Martin - Radiator delivery schedule • See LM presentation • Completion of Grid Thermal Control System hardware installation delay until Sep 05. • Will try to perform on a non-interference basis, but may impact LAT schedule. • Heater bonding fixture trials underway in I&T

  7. Open Flight Design Issues • Radiator integration sequence • Coupon testing of repeated make & break of joint has been tested. Results were inconclusive due to test facility problems. • Test facility alternatives under investigation. • Disassembly facilitated by use of mold release agent • Baseline process used for LM Radiator thermal vacuum test set up • Radiator vibration requirements • Sine vibration testing will not be performed at LM • Test options under investigation

  8. MECH Qualification Program

  9. Gamma-ray Large Area Space Telescope Cost/Schedule Reports for 4.1.8 Mechanical Systems Presentation July 2005 Month End

  10. Level 3 Milestone Count

  11. Level 3 Milestone List

  12. Milestone Variance Explanation Radiator RFI -36 days • Schedule Impact • No impact to LAT schedule • Cost Impact • LM requested additional funds to complete Radiator testing • Discussions between GLAST, LM and GSFC were held

  13. Cost Report

  14. Cost Variance Explanation • Why overrun/underrun? • LM has overrun their contract • Proceeding with Radiator testing while cost issue is being worked • What will be done to correct? • Additional funding required

  15. FTE Report (DOE/NASA-funded only)

  16. FTE Variance Explanation • Why overrun/underrun? • Delay caused by late start of Grid Box #2 assembly work • What is the impact? • Delay in Grid Static Load Test • No LAT impact

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