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LBT Q1 2007 Engineering Review. BGG Bogie Alignment. Summary. Excessive rail flaking Causes? Misalignment Materials. Known: Material hardness good Bogie A has built-in tilt Design is reasonable. Highlights (Q1/2007). No significant activity in Q1/2007

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Lbt q1 2007 engineering review

LBT Q1 2007 Engineering Review

BGG

Bogie Alignment


Summary
Summary

  • Excessive rail flaking

  • Causes?

    • Misalignment

    • Materials

  • Known:

    • Material hardness good

    • Bogie A has built-in tilt

    • Design is reasonable

LBT Q1 2007 Engineering Review


Highlights q1 2007
Highlights (Q1/2007)

  • No significant activity in Q1/2007

  • Monitored section cleaned in 12/2006

  • Contacted experts

    • UA Materials Science department

    • Rail, transportation industry

    • Keck Observatory

    • Vertex RSI

LBT Q1 2007 Engineering Review


Open issues
Open Issues

  • Technical

    • Root cause of flaking still unknown

    • No obvious solution identified

    • Any adjustment will affect entire building

  • Schedule

    • No repair planned

    • Cleaning and monitoring should be performed periodically by operations staff

LBT Q1 2007 Engineering Review


Open issues cont
Open Issues (cont.)

  • Financial

    • None

  • Resource

    • Ongoing cleaning and monitoring task must be assigned

    • Record of enclosure usage/rotations would be useful if feasible in software

LBT Q1 2007 Engineering Review


Progress q1 2007
Progress (Q1/2007)

  • Discussed issue informally with 4-5 experts

    • Flaking is normal

    • Lubrication recommended

    • Debris removal important

  • Other observatories experience same problem

  • Potential corrections are extremely costly, disruptive, and risky

  • Recommend passive monitoring

LBT Q1 2007 Engineering Review


Planning q2 2007
Planning (Q2/2007)

  • Continue to monitor “cleaned” area

  • Clean rest of rail if return of flaking is slow

  • Include rail cleaning and debris removal in regular preventive maintenance

LBT Q1 2007 Engineering Review