The airlock module mentioned previously being developed by our company in St. Louis. Some of the key features are the large tanks which contain the breathing oxygen for the crewman.

These modules with red equipment are the electrical power distribution modules. These receive the electrical power from the solar rays that you saw before and store them in rechargeable batteries, then distribute them through the vehicle to run the electrical equip

ment.

The main control center for the Skylab vehicle is contained in this part of the airlock. There is a large control and display panel where the electrical system is managed. There is a molecular sieve which purifies the atmosphere by removing carbon dioxide and humidity from the atmosphere.

The first airlock flight vehicle which is in its final assembly phase in St. Louis just as the Orbital Workshop is here. This is being done under clean-room conditions and you can see some of the wire bundles and tubes that are just being installed.

PERCENT

The question was asked previously about the airlock. The reason the airlock is called the airlock is because there are two hatches inside of it. You can see this circular one here that's open. There is another one like it here and a hatch in the side. When the crewmen go inside the vehicle two of them will lock themselves in this small compartment, close these doors, then evacuate the compartment to vacuum conditions and then open this hatch and go out into space.

The reason for that, of course, is that it makes it unnecessary to evacuate the entire vehicle, so it only uses up some three or four pounds of oxygen instead of the 300 or 400 pounds which would be required to refill the entire vehicle. Although the airlock does a lot more things than just being an airlock, that's the reason for its name.

This is just another photograph of the same flight vehicle. You see here the wire bundles routed and bagged again as you saw on our parts out here to keep them clean. Next sequence, please.

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PROCUREMENT

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FIGURE 7

The airlock program status is shown here (fig. 7). The design is nearing completion. The procurement of parts is about two-thirds complete, and if you look at the total progress we have made you can see we are about two-thirds complete with the program.

Now we will show a few pictures of the Orbital Workshop. I think you have seen this in the mockup so I won't say much more about the slides here (fig. 8).

TEST