Transcription Roman OBA Time-lapse Medium Version

1

00:00:00,000 --> 00:00:02,969

[Music throughout]

2

00:00:04,070 --> 00:00:07,640

[Testing Roman: Outer Barrel Assembly]

3

00:00:10,543 --> 00:00:14,080

[Outer Barrel Assembly (OBA)

Static loads test of carbon fibere support struts with aluminum mass simulatorts that mimic other parts of the spacecraft.

4

00:00:14,080 --> 00:00:17,650

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

5

00:00:22,622 --> 00:00:26,192

[Spin at 3 G

Final test of the strut portion of the OBA.]

6

00:00:55,388 --> 00:00:58,958

[Removal from Centrifuge

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

7

00:02:07,994 --> 00:02:11,564

[Mass Sim Removal

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

8

00:02:23,243 --> 00:02:26,813

[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.]

9

00:03:25,038 --> 00:03:28,608

[Move to Centrifuge

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

10

00:03:45,658 --> 00:03:49,229

[OBA Struts Preparation

Legs and interface ring are prepared to connect to shell section.]

11

00:03:55,068 --> 00:03:58,638

[Shell Section Lift Preparation

A load-distribution frame is prepared and attached.]

12

00:04:07,447 --> 00:04:11,017

[Shell Section Lift

Lifted and moved to connect with support struts.]

13

00:04:24,931 --> 00:04:28,501

[Complete OBA Assembled

The two halves are reconnected for the first time since testing.]

14

00:04:51,591 --> 00:04:55,161

[Moved into Centrifuge

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

15

00:05:03,770 --> 00:05:07,340

[Section Separation

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

16

00:05:27,827 --> 00:05:31,397

[Shell Section Attached

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

17

00:05:38,271 --> 00:05:41,841

[Spin at 3.9 G

First test of the shell section with a 13.7 rpm spin.]

18

00:06:17,910 --> 00:06:21,481

[Return to Neutral

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

19

00:06:34,427 --> 00:06:37,997

[One Down, Five To Go

The shell will be rotated and tipped for the next spin ... ]

20

00:06:42,935 --> 00:06:46,506

[One Down, Five To Go

The shell will be rotated and tipped for the next spin ... ]