Today In Aviation History: First Launch from Kennedy Space Center Complex 39A

According to Starlust.org, NASA launched the Apollo 4 mission exactly 59 years ago on November 9, 1967. The uncrewed mission lifted off at 7 a.m. EST from Launch Complex 39A at the Kennedy Space Center in Florida. Starlust.org noted this was the first-ever all-up test launch, meaning all three live stages of the Saturn V rocket were tested sequentially in a fully assembled stack. The flight served as a critical milestone paving the way for the historic Moon landing in 1969.

NASA stated that the primary objectives of Apollo 4 included testing the structural integrity of the rocket, its compatibility with the Command and Service Module, the Command Module's heat shield, overall reentry operations, rocket subsystems, and stage separation. Starlust.org reported that the rocket's third stage was placed in a parking orbit, made two revolutions of the Earth, and performed a simulated translunar injection burn. The burn propelled the spacecraft into a highly elliptical Earth orbit rather than sending it to the Moon. The Service Module engine subsequently fired to drive the capsule back into the atmosphere at roughly 25,000 mph, or 40,000 km/h, to simulate extreme reentry heat from a lunar journey.

The entire mission lasted 8 hours, 36 minutes, and 59 seconds. It concluded with the separation of the Command Module from the Service Module and a splashdown in the Pacific Ocean near Hawaii. Starlust.org detailed that the Saturn V was the largest and most powerful rocket built at the time. The successful flight occurred just over nine months after the Apollo 1 tragedy, providing a major morale boost to NASA.

Starlust.org explained that the Apollo 1 tragedy took place on January 27, 1967, when astronauts Virgil "Gus" Grissom, Ed White, and Roger Chaffee died in a cabin fire during a pre-flight training countdown rehearsal. The accident forced NASA to pause the program and redesign multiple spacecraft aspects. Changes included switching from the Block I capsule to the Block II version for crewed flights, introducing a unified hatch that opened in three seconds, restricting combustible materials, and avoiding 100 percent pure oxygen in the cabin during ground tests. Apollo 4 still used the Block I capsule because it was uncrewed.