America's Space Shuttle: APU/Hydraulic/Water Spray Boiler Systems NASA Astronaut Training Manual (APU/HYD/WSB 2102) (English Edition) [Kindle-editie] beoordelingen het boek quotes

This unique and historic document provides extraordinary detail about the Space Shuttle's Auxiliary Power Units (APUs), hydraulic system, and water spray boiler (WSB) system. The official NASA astronaut training manuals comprised a major part of the formal flight crew training process, and were used by flight controllers as well. These internal NASA manuals were produced by the Mission Operations Directorate (Space Flight Training Division branch) at NASA's Johnson Space Center. The manuals and workbooks are extremely detailed and comprehensive, and are designed for self-study. A full listing of all acronyms and abbreviations used in the text is included. They provide a superb way to learn about Shuttle systems, hardware, and operational procedures. Special emphasis on crew interaction with the displays, controls, and hardware is included.The orbiter has three independent Auxiliary Power Unit/Hydraulic/Water Spray Boiler (APU/HYD/WSB) systems.The hydraulic systems are similar to those found on large aircraft. These systems are used to move the orbiter aerosurfaces, throttle and steer the orbiter main engines, deploy the landing gear, provide nosewheel steering, apply the brakes, and retract the external tank umbilical plates after External Tank Separation (ET SEP).Power for the hydraulic systems is provided by three identical APUs. The APUs convert the chemical energy of liquid hydrazine into mechanical shaft power to drive the hydraulic main pumps. A fuel pump delivers hydrazine to the Gas Generator (GG) bed, where a catalyst decomposes it into a hot gas. This gas drives the turbine wheel, which provides the rotational shaft power to the hydraulic main pump.Cooling for the hydraulic fluid and lubricating oil is provided by a WSB on each system.During a typical flight, the APUs are started 5 minutes before lift-off and operate through the Orbital Maneuvering System 1 (OMS-1) burn when hydraulic power is no longer required.The APUs are basically inactive on orbit. One APU is run briefly the day before deorbit to support the Flight Control Surface (FCS) checkout.