S-IV
The S-IV was the second stage of the Saturn I rocket used by NASA for early flights in the Apollo program.

The S-IV was manufactured by the Douglas Aircraft Company and later modified by them to the S-IVB, a similar but distinct stage used on the Saturn IB and Saturn V rockets.

The S-IV stage was a large LOX/LH2-fueled rocket stage used for the early test flights of the Saturn I rocket. It formed the second stage of the Saturn I and was powered by a cluster of six RL-10A-3 engines. Each one of the engines supplied of thrust for a total of about . The cryogenic LH2 (liquid hydrogen) and LOX (liquid oxygen) tanks were separated by a common bulkhead. The forward bulkhead of the LOX tank formed the aft bulkhead of the LH2 tank. This saved up to 20% of structural weight.
Q1161829
second stage
Concept
Q521076
Saturn I
MISC
Q41291
rocket
ORG
Q23548
NASA
Concept
Q46611
Apollo program
ORG
Q651778
Douglas Aircraft Company
ORG
Q257161
S-IVB
MISC
Q719315
Saturn IB
MISC
Q54363
Saturn V
MISC
Q967724
RL-10A-3
MISC
Q622779
liquid hydrogen
Concept
Q618153
liquid oxygen
Concept
Q1030212
S-IV
MEDIA
Q1030212
S-IV
MEDIA
Q1030212
S-IV
MEDIA
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
-10^^http://www.w3.org/2001/XMLSchema#decimal
-10
NUMBER
-3^^http://www.w3.org/2001/XMLSchema#decimal
-3
NUMBER
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+20^^http://www.w3.org/2001/XMLSchema#decimal
20
NUMBER
part of
manufacturer
part of
subclass of
used by
item operated
manufacturer
part of
part of