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Images of Airlock Equipment and EVA Handrails

Table of EVA Equipment Images

These images are from JSC-20466 EVA Tools and Equipment Reference Book Rev. B, NASA Johnson Space Center, Houston, Texas, November 1993.

The Shuttle airlock weighs 825 lb total, when empty. Each hatch weighs 72 lb. Its general construction is aluminum honeycomb. The EMU mounting bolts are rated at 68-80 inch-lbs of torque. Safety tether points are rated at 587 lb pull load.

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. 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. I scanned most of these at 300 dpi, and then allowed the image size to grow when I changed the resolution to 72 dpi.

Space Shuttle Airlock Images

Dimensional Data for External Airlock Drawings

         inches       cm
     A    55.75    141.6
     B    57.50    146.1
     C     4.0      10.2
     D     3.0       7.6
     E    42.63    108.3
     F    36.0      91.4
     G   111.0     281.9
     H    54.34    138.0
     I    67.31    171.0
  1. asi199600132.gif 738x218 17K

    External airlock in the path of pressurized tunnels. Shuttle crew compartment is to the left. SpaceLab is shown on the right, though actually SPACEHAB laboratories were flown for the flights using this configuration. At the top of the external airlock is the docking adaptor for missions to the Mir space station.

  2. asi199600133.gif 677x599 34K

    Larger view of the external airlock and its carrier equipment. The general view is the same as the picture shown near the top of this page.

  3. asi199600134.gif 556x540 26K

    View of external airlock from inside Orbiter payload bay, looking toward the crew compartment.

  4. asi199600135.gif 175x154x256grays 26K

    This is the same picture as shown on this page.

  5. asi199600136.gif 608x681 26K

    External airlock, viewed from the starboard, looking toward port. Shows mounting of the suit in its rack on the wall of the airock.

  6. asi199600137.gif 452x632 26K

    External side view, with docking adaptor as used in the recent missions to the Mir space station. Refer to the table above for dimensional data.

  7. asi199600138.gif 648x1076 34K

    Top view of the external airlock with its carrier. The carrier carries structural loads through trunnion pins to the Orbiter payload bay sill. Refer to the table above for dimensional data.

  8. asi199600139.gif 588x540 26K

    View of the hatch from inside the airlock.

  9. asi199600140.gif 526x460 17K

    This is an auxiliary drawing of the hatch, showing its dimensions:

                  inches       cm
              A    20.00    50.80
              B    16.00    40.64
              C     1.75     4.45
  10. asi199600141.gif 608x828 26K

    Dimensions of the internal airlock:

                  inches       cm
              D    63.00   160.02
              E    83.00   210.82
    The internal and external airlocks are nearly identical (not counting all the extra doodads attached to the outside of the external airlock, of course). Internal volume of the airlock is 180 cubic feet. Adding 3 space suits reduces this to 150 cubic feet. The Orbiter airlock does not have a pump to recover its gas during depressurization; all this atmosphere is vented overboard each time a crew goes EVA.

  11. asi199600142.gif 1216x804 51K

    Large perspective drawing of the internal airlock mounted in the Orbiter mid-deck. Good view of the airlock hatch.

    This is the view from inside the Orbiter mid-deck, looking aft. The waste management compartment is to the right of the airlock; stowage lockers to the left. 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.

  12. asi199600143.gif 579x537 26K

    Phantom view of the Orbiter crew cabin showing the location of the internal airlock within the Orbiter's pressuized volume. The 576 bulkhead is the pressure wall between the crew cabin and the vacuum of space. Obiter bulkheads are referenced by their distance in inches aft of the Y-Z datum plane.

  13. asi199600144.gif 588x736 34K

    Phantom view of the Shuttle airlock as it is mounted on the Orbiter mid-deck. Shows stowage locations of both suits on the airlock walls, umbilical connections for suits, orientation of airlock hatches, interior airlock handrail, interior lights.

  14. asi199600145.gif 468x619 26K

    Side view showing how suits are stowed on top and bottom interior faces of the airlock.

Space Shuttle EVA Handrail Images

  1. asi199600146.gif 1933x2725 85K

    A scan of the whole page of EVA handrail data. Reduce it and print it at 300 dpi to see the dimensions and the shape of the standard EVA handrail. The dogbone cross-section is relatively new. It was developed for the space station program. Those extra flanges in the cross-section give the crew better control over their attitude while they're holding on to a handrail.

EVA Systems Technical Committee

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