EMU Mini Manuale Utente

1.32 Extravehicular Activity (EVA) Operations Overview

EVA Systems EMU Life Support System Components Continued: •  Battery •  Space to space EMU Radio (SSER; EMU Radio) •  Caution and Warning System (CWS)

EVA Systems EMU Space Suit Assembly Components: •  Hard Upper Torso (HUT)/arms •  Lower Torso Assembly (LTA) •  Extravehicular (EV) gloves •  Helmet/E

EVA Systems SAFER (Simplified Aid for EVA Rescue) SAFER is a self-contained, propulsive backpack self-rescue system that provides the EV crewmember

EVA Systems SAFER (Simplified Aid for EVA Rescue) HAND CONTROLLERMODULEPROPULSIONMODULESTOWEDDEPLOYEDFOR ATTACHMENTTO EMUATTACHED(NORMAL EVACONFIGURAT

EVA Systems Shuttle Airlock The shuttle airlock provides the following: •  The means for a suited EVA crewmember to transfer from the orbiter to the

EVA Systems ISS Joint Airlock U.S. Lab Equipment Lock Crew Lock ISS Joint Airlock: •  Primary for US ISS EVAs (both Orbiter and Station based) •  Comp

EVA Equipment & Tools EVA crewmembers use specific tools for each task and this generic equipment: •  Tethers -  55' safety tether, 2 waist t

EVA Equipment & Tools •  Pistol Grip Tool (PGT) – EVA torque wrench (i.e. a bolt turner) – Has a programmable torque limiter and turn limiter – C

EVA Equipment & Tools •  Foot Restraints -  Attaches to structure via a socket -  Provides EV CM rigid restraint at a worksite -  Different types:

EVA Equipment & Tools • Crew and Equipment Translation Aid (CETA) Cart –  Essentially an EVA equipment cart –  Translates by CM manually pulli

Objectives As a result of the Extravehicular Activity (EVA) Operations Overview presentation, students should be prepared to do the following: •  Iden

EVA Operations Overview EVA operations can be divided into three phases. Operations to prepare for EVA EVA Tasks Operations after EVA

EVA Operations Overview Operations to prepare for EVA •  Equipment Prep –  Prepares the airlock and the EMUs to be checked out before EVA. This is

EVA Operations Overview Operations to prepare for EVA O2 Prebreathe reduces the risk of Decompression Sickness (DCS) Protocol Mask prebreathe time In

EVA Operations Overview EVA Tasks Airlock depress Airlock egress Worksite operations: Shuttle and ISS-based –  All Shuttle EV crewmembers are train

EVA Operations Operations after EVA •  EMU Doffing •  EMU Maintenance and Recharge –  O2 Tank recharge –  Battery recharge –  H2O tank refill –  M

MOD’s EVA Role Three EVA Organizational groups at Johnson Space Center 1.  EVA Office (XA) –  Long-range flight planning –  Purchasing of flight hardw

EVA Training Facilities •  Shuttle Full-size Mockup Trainers -  Crew Cabin Trainer (CCT) and CCTII -  Full Fuselage Trainer (FFT) •  Precision Air-Bea

WEB Links •  DX32/35 Home page – http://mod.jsc.nasa.gov/dx/dx32/evahp.htm •  EVA History/Advanced suit program – http://www.jsc.nasa.gov/xa/a

Introduction •  EVA Categories •  EVA Systems •  EVA Equipment and Tools •  EVA Operations Overview •  MOD’s EVA Role •  EVA Training Facilities •  We

EVA Categories Extravehicular Activity (EVA) •  Definition: Crewmember leaves the protective environment of a pressurized spacecraft cabin and ventur

EVA Categories ISS vs Shuttle Terminology Three basic categories of EVA exist: 1.  Nominal* or Scheduled EVA: EVA planned prior to launch and includ

EVA Systems •  Extravehicular Mobility Unit (EMU) •  Simplified Aid For EVA Rescue (SAFER) •  Shuttle Airlock •  ISS Joint Airlock

EVA Systems EMU The EMU is an independent system that provides the crewmember with environmental protection, mobility, life support, and communication

EVA Systems EMU Two EMUs* are baselined to be flown on each shuttle flight with enough consumables to support 3 two-crewmember (Orbiter contingency) E

EVA Systems EMU Life Support System Components: •  Primary Life Support Subsystem (PLSS) -  Provides breathing O2, electrical power, comm, cooling -