Set of three ring-bound Hamilton Standard field manuals, each 3.75 x 5.5, circa late 1960s: two are entitled "Apollo Portable Life Support and Oxygen Purge Systems," issued as "B231" and contain 118 pages, and explain the basic function and operation and lists the salient component parameters of the Portable Life Support System (PLSS) and the Oxygen Purge System (OPS), with sections including: Oxygen Ventilating Circuit, Feedwater Loop, Liquid Transport Loop, Primary Oxygen Subsystem, and Oxygen Purge System. The third booklet, entitled "Apollo Portable Life Support Systems," issued as "B231A" and containing 146 pages, explains the basic function and operation and lists the salient component parameters for the following Second Generation Apollo Portable Life Support Elements: Portable Life Support System (PLSS), Oxygen Purge System (OPS), Buddy Secondary Life Support System (BSLSS), and Pressure Control Valve (PCV). In overall fine condition. From the collection of Dan Schaiewitz, who worked as Extravehicular Crew Training Engineer at KSC. View Dan's many Collect Space posts here. Engineer Dan Schaiewitz gives us a fascinating firsthand glimpse into his experiences on the cutting edge of space exploration during the Apollo missions, in this podcast.
