The file name is misleading. The bioinstrumentation system monitors the EVA crew member's heart rate (electrocardiogram) during an EVA. The contaminant cartridge consists of lithium hydroxide, charcoal and filters to remove carbon dioxide, odors, particulates and other contaminants from the ventilation circuit. Orbiter Structures. Normally, two EMUs are stowed in the airlock. I kept them large to avoid losing resolution, but after loading these images onto your machine, you should be able to convert them from gif to whatever format you want, and adjust the resolution of the drawing to suit your needs.

The two dark rectangles at either side of the top of the picture are the open passages between the flight deck and the mid-deck. Upon return from the EVA, the PLSS is reconnected to the SCU, and crew member cooling is as it was in the EVA preparation.

Airlock depressurization is accomplished in two stages by a three-position valve located on the ECLSS panel AW82A in the airlock. Friction is also provided in the linkage to prevent the hatch from moving if released during any part of the swing. It is mounted at the base of the PLSS and contains a 30-minute oxygen supply, a valve and a regulator assembly. The hatch is held in the open position by straps and Velcro. B, NASA Johnson Space Center, Houston, Texas, November 1993. A tube from the upper hard torso to the helmet permits the EVA crew member to drink water while suited. The airlock, tunnel adapter and hatches also permit EVA flight crew members to transfer into the payload bay from the tunnel adapter in the space suit assembly without depressurizing the spacecraft crew cabin and Spacelab. The SCU umbilical is disconnected just before the crew member leaves the airlock on an EVA and is reconnected when he returns to the airlock. Shuttle crew compartment is to the left. The gloves contain the wrist connection, wrist joint and insulation padding for palms and fingers. Full oxygen recharge takes approximately one hour (allowing for thermal expansion during recharge), and the tank pressure is monitored on the EMU display and control panel as well as on the airlock oxygen pressure readout. The gloves and helmet are then put on, and the EMU is disconnected from the AAP. When the EVA is completed and the SCU is reconnected, the orbiter's oxygen supply begins recharging the PLSS, assuming that the oxygen valve on panel AW82B is open. Hygiene Equipment on Orbit Locations (with galley), from Space Shuttle News When the hatch latches are rotated closed, the struts are retracted against the hatch. Crew Module Layout. A rotation release knob on the foot restraint is designed for shirt-sleeve operation; therefore, it must be positioned before the suit is donned.

Cooling for flight crew members before and after the EVA is provided by the liquid-cooled garment circulation system via the SCU and LCG supply and return connections on panel AW82B. The airlock hatches are mounted on the airlock. Ducting along the garment's arms and legs directs oxygen and carbon dioxide from the suit to the life support system for purification and recirculation. | Video Gallery The tether consists of a reel case with an integral D-ring, a reel with a light takeup spring, a cable and a locking hook. Oxygen for the air system is fed from the primary oxygen containers through regulators that maintain suit pressure at 4.1 psid. With the suit connected to the SCU, oxygen at 900 psia, plus or minus 500 psia, is supplied through airlock panel AW82B from the orbiter's oxygen system when the oxygen valve is in the open position on the airlock panel. The airlock adapter plate in the airlock also provides a fixed position for the EMUs to assist the crew member during donning, doffing, checkout and servicing. Air and cooling water are passed through fins in the sublimator, which extracts heat from each system.

The EMU weighs approximately 225 pounds, and its overall storage envelope is 26 by 28 by 40 inches. It is replaceable upon completion of an EVA. To latch or unlatch the hatch, a rotation of 440 degrees on the gearbox handle is required. The PLSS normally provides the EVA crew member with oxygen for breathing, ventilation and pressurization and water for cooling. The safety tether hook is locked onto the slidewire before launch, and the cable is routed and clipped along the left and right handrails to a position just above the airlock and payload bay hatch. The linkage mechanism guides the hatch from the close/open, open/close position with friction restraint throughout the stroke. Lee Hutchinson - Jun 25, 2015 5:15 pm UTC A scan of the whole page of EVA handrail data. The closest analog is probably the Space Shuttle/ Spacelab/ Space Station airlock. The microprocessor monitors the power consumed and signals at high current-drain rates and also when an estimated 30 minutes of battery power is left. A minimum rotation of 440 degrees with a maximum force of 30 pounds applied to the actuator handle is required to operate the latches to their fully unlatched positions. The airlock depressurization valve is connected to a 2-inch-inside-diameter stainless steel overboard vacuum line. Except where noted, all images are 2-color (black and white) bitmaps, so although the drawing sizes tend to be very large at 72 dpi, the file sizes are rather small. The service and cooling umbilical contains communication lines, electrical power, water, water drain line and oxygen recharge lines. The EVA communicator and EMU antenna provide EVA communications via its transceiver and antenna between the suited crew member and the orbiter. The PLSS expendables include 1.2 pounds of oxygen pressurized to 850 psia in the primary bottles, 2.6 pounds of oxygen at 6,000 psia in the secondary pack, 10 pounds of water for cooling in three bladders and lithium hydroxide in the contaminant control cartridge.

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