Three substantial early reports associated with Space Shuttle propulsion, including: a 560-page document entitled "OFT-1 Preliminary Preflight Propulsion Prediction (Ascent)," June 1976, with hundreds of pages of data from a mission simulation, including numerous chart plots and arcane computational data tables; a ~260-page document on the subject of "Main Propulsion System Performance Prediction for STS-1," January 8, 1981, with similar data from a simulation made utilizing the EL24 computer program SIPPS (Shuttle Integrated Performance Prediction Simulation); and a ~230-page document entitled "STS-2 Measurement Locations: Solid Rocket Boosters, Main Propulsion System," August 1, 1981, describing the locations of each data measurement sensor used in the STS-2 SRBs and MPS in a series of detailed diagrams and sophisticated fold-out charts. In overall fine condition.