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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

22’ Diameter3’ high4,500 pounds

Between 3rd Stage and Payload (LTA)

Saturn V and I-B IUs almost identical

No interaction with crew after launch

Computer: IBM Federal Systems DivisionHybrid circuits, similar to System/360Serial logic, 28 bit word lengthTriple RedundancyCore memory: 32,768 words82 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)