Apollo 1

Lore & Background

The Apollo 1 command module, designated CM-012, was a Block I version built by North American Aviation. This design predated the lunar orbit rendezvous landing strategy and therefore lacked the capability to dock with a lunar module. The spacecraft was destroyed by a cabin fire during a launch rehearsal test at Cape Kennedy Air Force Station Launch Complex 34. The fire’s ignition source was determined to be electrical, and it spread rapidly due to combustible nylon material and a high-pressure pure oxygen atmosphere. The plug door hatch could not be opened against the internal pressure, preventing rescue. The mission’s planned range was low Earth orbit, launched on a Saturn IB rocket, with a duration of up to two weeks. The test was intended to evaluate launch operations, ground tracking, and the performance of the Apollo-Saturn assembly. The crew—Command Pilot Gus Grissom, Senior Pilot Ed White, and Pilot Roger B. Chaffee—were killed. The name Apollo 1, chosen by the crew, was made official by NASA in their honor. The backup crew originally consisted of James McDivitt, David Scott, and Russell Schweickart, but was later replaced by Walter Schirra, Donn Eisele, and Walter Cunningham. The Saturn IB launch vehicle for this mission was later used for the first uncrewed lunar module test flight, Apollo 5.

Reader's Guide

The Apollo 1 fire was a pivotal tragedy in the American space program, leading to a twenty-month suspension of crewed Apollo flights while the command module's hazards were addressed. The accident prompted a thorough investigation by NASA's Accident Review Board and both chambers of the United States Congress. The fire's rapid spread was attributed to combustible nylon material and the high-pressure pure oxygen cabin atmosphere, while rescue was prevented by the plug door hatch, which could not be opened against internal pressure. The test had not been considered hazardous because the rocket was unfueled, and emergency preparedness was poor. The disclosure of the Phillips Report during congressional hearings embarrassed NASA administrator James E. Webb and attracted controversy, but the committees ruled the report's issues had no bearing on the accident. The lessons learned from Apollo 1 directly influenced the redesign of the command module, contributing to the eventual success of the Apollo program, including the first crewed mission flown by the backup crew on Apollo 7. The name Apollo 1 was made official by NASA in honor of the crew after the fire.

Did You Know?

• The Apollo 1 crew chose the name Apollo 1, which was made official by NASA after the fire.
• The ignition source of the fire was determined to be electrical, and the fire spread rapidly due to combustible nylon material and the high-pressure pure oxygen cabin atmosphere.

Common Misconceptions (Editorial)

Some people think the Apollo 1 crew did not choose the mission's name themselves, but the facts confirm the crew selected "Apollo 1" and NASA made it official after the fire in their honor. Another misconception is that the Phillips Report directly caused or was linked to the accident; however, both congressional committees ruled that the issues in the report had no bearing on the fire.

Why It Matters (Editorial)

Apollo 1 endures as a sobering reminder that human spaceflight's greatest advances are often bought with the lives of its pioneers. The disaster forced NASA to fundamentally reexamine spacecraft safety, halting crewed flights for twenty months and leading to design changes that ultimately made later Apollo missions successful. The crew's choice to name their mission Apollo 1, and NASA's decision to honor that name, ensures their sacrifice is remembered as the beginning of the program's journey to the Moon.