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S-IV

Upper stage for NASA's Saturn I rocket

Field	Value
name	S-IV
image	S-IV rocket stage.jpg
caption	Schematics of the S-IV
manufacturer	Douglas Aircraft Company
country	United States
rockets	Saturn I (stage 2)
height	12.19 m
diameter	5.49 m
mass	50,576 kg
propmass	45,359 kg
empty	5,217 kg
status	Retired
launches	6
success	6
first	January 29, 1964
last	July 30, 1965
name	S-IV 100 series
engines	6 × RL-10
thrust	400 kN
SI	410 isp
burntime	482 s
fuel	LH2 / LOX
derivatives	S-IVB

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 66.7 kN of thrust for a total of about 400 kN. 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.

Flight history

Mission serial number	Launch date (UTC)	Image	Launch notes
SA-1	October 27, 1961
15:06:04	[[File:S-IV-1.jpg	frameless	150x150px]]	{{Bulleted list
SA-2	April 25, 1962
14:00:34	[[File:S-IV-2.jpg	frameless	150x150px]]	{{Bulleted list
SA-3	November 16, 1962
17:45:02	[[File:S-IV-3.jpg	frameless	150x150px]]	{{Bulleted list
SA-4	March 28, 1963
20:11:55	[[File:S-IV-4.jpg	frameless	150x150px]]	{{Bulleted list
SA-5	January 29, 1964
16:25:01	[[File:S-IV-5.jpg	frameless]]	{{Bulleted list
SA-6	May 28, 1964
17:07:00		{{Bulleted list
SA-7	September 18, 1964
16:22:43	[[File:S-IV second stage of SA-7.webp	frameless]]	{{Bulleted list
SA-9	February 16, 1965
14:37:03	[[File:Second Stage for SA-9.jpg	frameless]]	{{Bulleted list
SA-8	May 25, 1965
07:35:01		{{Bulleted list
SA-10	July 30, 1965
13:00:00		{{Bulleted list

References

{{Harvnb. Bilstein. 1999
{{Harvnb. Bilstein. 1999
{{Harvnb. Apollo Summary Report. 1975

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

apollo-program rocket-stages saturn-i saturn-c-3 saturn-c-2 saturn-b-1

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