Saturn V Instrument Unit (IU)
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Saturn V Instrument Unit (IU)
Installation at the Steven F. Udvar-Hazy Center
Chantilly, VA
Smithsonian
National Air and Space Museum
Paul E. CeruzziDivision of Space History
September 10, 2004
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The “Other” Apollo Guidance Computer
Instrument Unit: Structural part of Saturn V RocketHoneycomb Aluminum
22’ Diameter3’ high4,500 pounds
Between 3rd Stage and Payload (LTA)
Saturn V and I-B Instrument Units werealmost identical
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Launch Vehicle Digital Computer(LVDC) and Data Adapter
IBM Federal Systems Division, Owego Integrated at IBM Huntsville
Hybrid circuits, similar to System/360
Serial logic, 28 bit word length
Triple Redundancy
Core memory: 32,768 words
82 microsec. Cycle time
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At IBM Huntsville Facility
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In the Vehicle Assembly Building
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NASM IU, Number 514(Apollo 17 was Saturn # 512)
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Interior, Cleaned & Prepped
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Where LVDC and Data Adapter were installed
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Gas Bottle, Missing IMU
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Flight Control Computer, Analog
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Loaded on Truck, Suitland, MD
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Waiting for Midnight
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To Dulles via Wilson Bridge, I-66, Route 50
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Arrival at Dulles (Next to the Enterprise)
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The Space Hangar at the Udvar-Hazy Center (opens October 2004)