S-IVB
Videos
The S-IVB was the third stage on the Saturn V and second stage on the Saturn IB launch vehicles. Built by the Douglas Aircraft Company, it had one J-2 rocket engine. For lunar missions it was fired tw
S-IVB-206 which was used for the Skylab 2 flight
Cutaway drawing of the Saturn V S-IVB
Apollo 7 S-IVB in orbit over Cape Canaveral
Distant view of Apollo 7 S-IVB stage
Saturn IB
Videos
The Saturn IB was an American launch vehicle commissioned by the National Aeronautics and Space Administration for the Apollo program. It uprated the Saturn I by replacing the S-IV second stage, with
Three launch configurations of the Apollo Saturn IB rocket: no spacecraft (AS-203), command and service module (AS-202), and Lunar Module (Apollo 5)
Diagram of the S-IB first stage of the Saturn IB rocket
Diagram of the S-IVB second stage of the Saturn IB
The instrument unit, which controlled the Saturn IB and Saturn V