One of the signs by LM-2. It reads
APOLLO LUNAR MODULE
Since lunar modules were designed to fly only in the vacuum of space, they did
not have to be streamlined like an aircraft or carry a heat shield for
protection during reentry. Once a lunar module was launched into space, it
could not return to Earth.
The lunar module had two stages:
- The silver-and-black ascent stage contained the crew's pressurized
compartment and the clusters of rockets that controlled the spacecraft.
- VHF Antenna
- Docking Target
- Forward Hatch
- Tracking Light
- Window (2)
- S-Band Steerable Antenna
- Rendezvous Radar Antenna
- S-Band Inflight Antenna
- RCS Thrust-Chamber Assembly Cluster
- Landing Pad
- The gold-and-black descent stage, like the ascent stage, contained a
main, centrally located rocket engine and tanks of fuel and oxidizer.
- Lunar Surface Sensing Probe
- Descent Engine Skirt
- Egress Platform
The sign puts #10 "Landing Pad" on the ascent, rather than descent, stage. The
sign also incorrectly identifies the EVA
antenna as the docking target.
Also, the diagram of the LM reflects LM-3 from Apollo 9: It lacks plume deflectors and has landing probes on all
four legs (although LM-2 is displayed without landing probes). Plume
deflectors were added to LM-5 (Apollo 11) and subsequent due to scorching of
the descent stage by the downward-facing RCS thruster as observed by the Apollo
9 astronauts. The landing probe on the leg with the ladder was deleted
starting with LM-4 (Apollo 10) because the probes bend upon contact with the
lunar surface and may wind up pointing any which way; there were fears of an
astronaut puncturing his space suit while climbing down the ladder.