Page 67 - Apollo Moonships

The lunar spider 65
Midsection
Reaction thrusters
Crew compartment
2 ASCENT STAGE MIDSECTION
Internally, this non-manned section had an elliptical shape and measured 54 inches deep and 5 feet high. The area was part of the crew cabin and housed critical life support systems, including the Environmental Control System, the water dispenser, and the Oxygen Purge System.
3 OVERHEAD HATCH AND DOCKING TUNNEL At the top centerline of the midsection was the overhead hatch, which permitted access from
the LEM to the CSM (and vice versa) when both spaceships were docked. A tunnel of 32 inches in diameter and 16 inches long allowed the transfer of astronauts and equipment.
VHF antenna
Inertial measurement unit
Aft structural rack
Electrical and electronic equipment
S–band antenna
Reaction trusters propellant tanks
Ascent engine oxidizer tank
Ascent engine fuel tank
4
CREW COMPARTMENT
This cylindrical section comprised the frontal area of the ascent stage and measured 92 inches in diameter and 42 inches in depth. This pressurized area included the crew flight stations and all the controls and display panels to guide and govern the spaceship.
5 AFT EQUIPMENT BAY
This area contained a structural rack
packed with critical electronic and electrical components. The rack mounted vertical cold rails, which used refrigerant flows to cool the equipment. The AFT bay also contained two oxygen tanks and two gaseous helium tanks.
Plumbing
Helium tanks
6 ASCENT ENGINE
The ascent engine assembly was mounted below the lower deck of the midsection, and part of it protruded up inside the cabin. A cylindrical cover protected the equipment and accessories of the cabin from the protruding part of the engine.