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Gravity Probe B

Testing Einstein's Universe

WEEKLY HIGHLIGHTS FOR WEEK ENDING 22 SEPTEMBER 2000:

PAYLOAD HIGHLIGHT
The gyroscope test group has successfully completed the room temperature checkout of flight gyroscopes #3 and #4. The tests included a caging touch test, gyroscope suspension, cavity exploration, gyroscope spin down in the cavity center, and gyroscope spindown in the rotor spinup location. The team members involved in this work are Rob Brumley, Ken Bower, Bruce Clarke, Chris Gray, David Hipkins, Russ Leese, and Yoshimi Ohshima.

Photo: A flight gyro and its housing assembly under monochromatic light for inspection.
Please click the small photo to see an explanation of the remarkable change-out of Gyro #4

SPACE VEHICLE HIGHLIGHT
The ARP-Launch Restraint Mechanism (ALRM) Proto-qual Toggle Shaft Torsion Spring successfully completed torque margin testing in LM B/255.

Photo: LM Engineer Neil Geiger with the ALRM Toggle Assembly in LM B/255.

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