WEBVTT FILE

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[Music throughout]

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[Testing Roman: Outer Barrel Assembly]

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[Outer Barrel Assembly (OBA)
Static loads test of carbon fibere support struts with aluminum mass simulatorts that mimic other parts of the spacecraft.

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The structure is rotated and tipped differencely for each test.]

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[Spin at 3 G
Final test of the strut portion of the OBA.]

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[Removal from Centrifuge
Strain sensors and lower mass sims are removed, then the structure is detached and lifted from the test platform.]

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[Mass Sim Removal
The cone-shaped metal that simulates the OBA shell section is lifted off, leaving the interface ring and struts.]

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[OBA Shell Section Preparation
In a cleanroom, protective wrap and mass sims are added to the OBA’s other half, which will shield the mirror.]

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[Move to Centrifuge
The shell section is lowered onto wheels andpushed by hand to the centrifuge facility.]

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[OBA Struts Preparation
Legs and interface ring are prepared to connect to shell section.]

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[Shell Section Lift Preparation
A load-distribution frame is prepared and attached.]

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[Shell Section Lift
Lifted and moved to connect with support struts.]

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[Complete OBA Assembled
The two halves are reconnected for the first time since testing.]

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[Moved into Centrifuge
The OBA is pushed into centrifuge by hand  since no cranes connect the two spaces.]

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[Section Separation
The shell section, now with the interface ring attached, is removed and lifted off the struts, which are pushed out. ]

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[Shell Section Attached
The shell section is carefully bolted to the centrifuge test platform and 94 sensors are individually connected.]

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[Spin at 3.9 G
First test of the shell section with a 13.7 rpm spin.]

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[Return to Neutral
The roughly 600,000-pound centrifuge is smooth and balanced enough to push by hand.]

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[One Down, Five To Go
The shell will be rotated and tipped for the next spin ... ]

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[One Down, Five To Go
The shell will be rotated and tipped for the next spin ... ]