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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 BGG Bogie Alignment
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) • 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 • 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.) • 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) • 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) • 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