Keywords: Saturn I Block II IUs.jpg Version 1 top and version 2 bottom of the Instrument Unit Versions 1 and 2 of the IU IU-versito 1 ja 2 自動制御装置バージョン1(上)とバージョン2(下) Block II Instrument Units Version 1 top had pressurized tubular sections and the IU was 58 in tall Version 2 bottom was only 34 in tall and did not have pressure vessels markedly reducing weight Saturn I Summary PDF p 36 <br/> original text 1 1966 PD-USGov original upload log page en wikipedia Saturn_I_Block_II_IUs jpg 2008-03-19 21 16 EdgarDurbin 1315×1607×8 215771 bytes <nowiki> Block II Instrument Units Version 1 top had pressurized tubular sections and the IU was 58 in tall Version 2 bottom was only 34 in tall and did not have pressure vessels markedly reducing weight Saturn I Summary </nowiki> Apollo missions Saturn I Instrument Unit |