Two official Rocketdyne F-1 rocket engine "Quarterly Progress Report" publications, both with blacked-out "Confidential" markings, dated July 30, 1959 and August 4, 1961. The first is 247 pages and contains information about progress made in the thrust chamber, mark 10 turbopump, gas generator system, controls, engine systems, ground support equipment, engineering tests, thrust vector control, and hydrazine additives, including many fold-out diagrams and illustrated charts. The second is 250 pages and contains information about progress made in the thrust chamber, turbomachinery, gas generator, controls, engine system, and facilities, including numerous illustrations and a pocket containing microfilm transparencies. In overall very good condition, with heavy cover wear, and expected handling wear from use.
