Alm

Figure 1-2. LM Configuration

+5.350 REF

Figure 1-4. Station ¿ rence Measurements

X—axis d««ign r«f«r«nc* point» «kwt at +200.000.

Z-AND Y—AXIS STATION ZERO

Z-AND Y—AXIS STATION ZERO

Segnalazione Bandiere Alfabeto

X—axis d««ign r«f«r«nc* point» «kwt at +200.000.

+5.350 REF

Figure 1-4. Station ¿ rence Measurements ooaxAu-i»

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Figure 1-3. LM Overall Dimensions

■ 1.2.2.1.1 Control and Display Panels. (See figure 1-7.)

The crew compartment has 12 control and display panels: two main display panels (1 and 2) that are canted forward 10°, two center panels (3 and 4) that slope down and aft 45° towards the horizontal, two bottom side panels (5 and 6), two lower side panels (8 and 12), one center side panel (14), two upper side panels (11 and 16), and the orbital rate display - earth and lunar (ORDEAL) panel aft to panel 8.

Panels 1 and 2 are located on each side of the front face assembly centerline, at eye level. Each panel is constructed of two 0.015-inch-thick aluminum-alloy face sheets, spaced 2 inches apart by formed channels. The spacer channels are located along the sheet edges; additional channels, inboard of the edge channels, reinforce the sheets. This forms a rigid box-like construction with a favorable strength-to-weight ratio and a relatively high natural frequency. Four shock mounts support each panel on the structure. Panel instruments are mounted to the back surface of the bottom and/or to the top sheet of the panel. The instruments protrude through the top sheet of the panel. All dial faces are nearly flush with the forward face of the panel. Panel 1 contains warning lights, flight indicators and controls, and propellant quantity indicators. Panel 2 contains caution lights, flight indicators and controls, and Reaction Control Subsystem (RCS) and Environmental Control Subsystem (ECS) indicators and controls.

Panel 3, immediately below panels 1 and 2, spans the width of these two panels. Panel 3 contains the radar antenna temperature indicators and engine, radar, spacecraft stability, event timer, RCS and lighting controls.

Panel 4 is centered between the flight stations and below panel 3. Panel 4 contains attitude controller assembly (ACA) and thrust translation controller assembly (TTCA) controls, inertial subsection indicators, and LM guidance computer (LGC) indicators and controls. Panels 1 through 4 are within easy reach and scan of both astronauts.

Panel 5 and 6 are in front of the flight stations at astronaut waist height. Panel 5 contains lighting and mission timer controls, engine start and stop pushbuttons, and the X-translation pushbutton. Panel 6 contains abort guidance controls.

Panel 8 is at the left of the Commander's station. The panel is canted up 15° from the I horizontal; it contains controls and displays for explosive devices, audio controls, and heater controls.

Panel 11, directly above panel 8, has five angled surfaces that contain circuit breakers. Each row of circuit breakers is canted 15° to the line of sight so that the white band on the circuit breakers can be seen when they open.

Panel 12 is at the right of the LM Pilot's station. The panel is canted up 15° from the horizontal; it contains audio, communications, and communications antennas controls and displays.

Panel 14, directly above panel 12, is canted up 36.5° from the horizontal. It contains controls and displays for electrical power distribution and monitoring.

Panel 16, directly above panel 14, has four angled surfaces that contain circuit breakers. Each row of circuit breakers is canted 15° to the line of sight so that the white band on the circuit breakers can be seen when they open.

The ORDEAL panel is immediately aft of panel 8. It contains the controls for obtaining LM attitude, with respect to a local horizontal, from the LGC.

The forward hatch is in the fronWace assembly, just below the lower display panels. The hatch is approximately 32 inches square; it is hinged to swing inboard on quick-release hinge pins when opened. A cam latch assembly holds the hatch in the closed position; the assembly forces a lip, around the outer circumference of the hatch, into a preloaded elastomeric silicone compound seal that is secured to the LM structure. Cabin pressurizalion forces the hatch lip further into the seal, ensuring a pressure-tight contact. A handle is provided on both sides of the hatch, for latch operation. To open the hatch, the cabin must be completely depressurized by opening the cabin relief and dump valve on the hatch. When the cabin is completely depressurized, the hatch can be opened by rotating the latch handle. A lockpin in a plate over the latch can be withdrawn to release the latch in an emergency. The cabin relief and dump valve can also be operated from outside the LM.

1.2.2.1 Crew Compartment. (See figures 1-5 and 1-6.)

The crew compartment is the frontal area of the ascent stage; it is 92 inches in diameter and 42 inches deep. This is the flight station area; it has control and display panels, armrests, body restraints, landing aids, two front windows, a docking window, and an alignment optical telescope (AOT). Flight station centerlines are 44 inches apart; each astronaut has a set of controllers: and armrests. Circuit breaker, control, and display panels are along the upper sides of the compartment. Crew provision storage space is beneath these panels. The main control and display panels are canted and centered between the astronauts to permit sharing and easy scanning. An optical alignment station, between the flight stations, is used in conjunction with the AOT. A portable life support system (PLSS) donning station is also in the center aisle, slightly aft of the optical alignment station.

The crew compartment shell is cylindrical and of semimonocoque construction. It is a fusion-welded and mechanically fastened assembly of aluminum-alloy sheet and machined longerons. The shell has an opening for the docking window, above the Commander's flight station. The front face assembly of the crew compartment has two triangular windows and the forward hatch. Two large structural beams extend up the forward side of the front face assembly; they support the structural loads applied to the cabin structure. The lower ends of the beams support the two forward interstage mounts; the upper ends are secured to additional beam structure that extends across the top of the crew compartment shell and aft to the midsection structure. The crew compartment deck measures approximately 36 by 55 inches. It is constructed of aluminum honeycomb bonded to two sheets of aluminum alloy. Nonflammable Velcro pile strips, which contact hooked Velco material on the astronaut boots, are bonded to the deck surface. Handgrips, recessed in the deck, aid the astronauts during egress and ingress through the forward hatch. Perforated glass-reinforced plastic covers the ceiling above the flight stations. A handrail, with five green radio luminescent disks attached to it, is bolted to the left-hand structural beam of the front face assembly.

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