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Sources
kevinforsyth.net
To Reach the High Frontier: A History of U.S. Launch Vehicles
"A valuable contribution to the field of aerospace literature," this book includes an extensive overview of Delta history and development along with chapters on Atlas, Titan, Scout, Space Shuttle, and much more.
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Many other excellent books about spaceflight are recommended here.
21-Oct-98 | Delta III failure investigation completed
The unexpected roll oscillation during the Delta III launch on 27-Aug-98 was the result of a single roll mode out of 56 in the control software. The mode caused the Thrust Vector Control motors to gimbal back and forth in unison, generating torque vectors which became significant at altitude as the rocket shed propellant mass. A bug fix in the software should have the Delta III ready for its scheduled return-to-flight in early 1999. Boeing press release