1961-10-27 USA Saturn I SA-1

Saturn-Apollo 1 (SA-1), launched on October 27, 1961, marked the inaugural flight of the Saturn I space launch vehicle, the first in the Saturn series and the initial mission of the American Apollo program. The Saturn I booster represented a significant leap in size and power compared to previous launch vehicles. It was three times taller, required six times more fuel, and generated ten times the thrust of the Jupiter-C rocket, which had launched the first American satellite, Explorer 1, into orbit in 1958.

A "SpaceCraft" illustrated cachet cover cancelled on the day of the first launch of Saturn 1, PAFB October 27, 1961.
Photo: Saturn test conductor Bob Mosier (left) and launch operations director Dr. Kurt H. Debus (right) engaged in discussion following the simulated launch of the Saturn rocket at Cape Canaveral.
At that time, NASA opted against all-up testing, where the entire system is tested simultaneously. Instead, the agency planned to test each rocket stage individually through separate launches. For SA-1, the only operational stage was the S-I first stage. This initial flight aimed to assess the structure of the launch vehicle during a suborbital flight, utilizing a nose cone from a Jupiter rocket.

A Saturn 1 launch cover cancelled Port Canaveral, October 27, 1961.
(Reference from Saturn I SA-1)