Questions tagged [saturn-v]

Questions pertaining to the launch vehicle developed by Wernher von Braun's team under Arthur Rudolph's supervision at Marshall Space Flight Center for carrying astronauts to the Moon. Saturn V (or C-5 configuration) had three stages with clustered engines F-1 and J-2 and an instrument unit.

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1answer
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Are there any N1 rockets (the Soviet answer to the Saturn V) still in existence?

Knowing the work that went into the Saturn V, being able to see the size of it in person at the Kennedy Space Center was almost a religious experience. I would love to be able to see an N1. Are there ...
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Vibration and noise during launch of the Saturn V and Spaceshuttle in comparison?

I just saw a TV docu about the Apollo mission. Apollo 8 astronaut William Anders said the vibrations and noise during launch were much heavier than expected. I later heard a speech by the Shuttle ...
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What were the reasons the American space-race era rockets didn't use boosters?

Many families of rockets use booster rockets, most notably the R-7 rockets that the Soviet and later Russians use. In comparison the American space-race era rockets mostly didn't. For example, the ...
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Why a 900,000 gallons LOX storage tank at Launch Complex 39?

At KSC complex 39 there is a 900,000 gallons LOX storage tank. It was used for Apollo Saturn V, the Space Shuttle and lately for the SpaceX Falcon 9 Full Thrust rocket. But why such a large tank for ...
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For F1 rocket engine, why propellant holes were not in proportion to the fuel to oxidizer ratio?

I understand that the F1 rocket engine had (approximately) 1428 Oxidizer holes and (approximately) 1404 Fuel (RP1) holes in the injector plate. Since the Oxidizer to fuel ratio was 2.27:1 for the F1 ...
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How many rising pipes for LOX at the the Saturn V launch tower?

The Saturn V used liquid oxygen for all three stages plus the Apollo Service Module. Were all these LOX tanks filled using the same rising pipe or did they use a seperate pipe for each tank? Using ...
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Did they mount the Apollo Mobile Service Structure (MSS) to the launch pad using nuts and bolts to be prepared for a storm?

The Mobile Service Structure (MSS) was used for every launch preparation of the Saturn V. It was removed some hours before launch. The MSS is the white tower on the left side. The MSS was moved and ...
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How did they access the LM to mount the flag package while the Apollo stack was already on the launch pad?

NASA decided rather late to take a flag to the Moon on the Apollo 11 mission. In fact, they were so late that the package containing the flag was only attached to the leg of the LM on July 9th, two ...
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Is it correct that the Saturn V RP1 tank was pressurized by high pressure helium and the LOX tanks were pressurised by oxygen?

I understand from many sites that in the first stage of the Saturn V, the RP1 tank was pressurized by high pressure Helium tanks, but the LOX tanks were pressurized using gaseous oxygen. Is this ...
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Why is there a Saturn V in the background of this Gemini-Titan launch?

In this photo, a Gemini-Titan is lifting off in the foreground, while a Saturn V is visible in the background. The last Gemini flight was in late 1966, but the first flight of a Saturn V wasn't ...
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Saturn V Small Rectangles On S-II Stage

On the Saturn V there was a line of several small black rectangles running vertically on the upper part of the S-II stage. What were they for? edit here is a picture from the McMahan Photo Archive....
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How was the Saturn 5 rocket measured? PI tape, Micrometers, calipers? [closed]

I am wondering what type of gauging was used to inspect and verify the Saturn 5 rocket?
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Saturn V and Atlas Engines exhaust issues

This is a follow up question to "Organic Marbles" answer to my earlier question about the atlas rocket exhaust nozzle, regarding the Apollo F1 thrust nozzles having metal baffles/fins inside to ...
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1answer
663 views

was Saturn V engine J-2 throttleable?

Were the J-2 engines of the third stage of Saturn V throttable? I know that the F-1 for first was not, but what about J-2? I could not find any information about it. Any reference or info for this? ...
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1answer
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Estimate of how fast will the Starship/Super Heavy be moving 5 and 10 seconds after liftoff?

I am wanting to make a comparison of the expected initial seconds of the ascent of the Starship/Super Heavy compared to the similar time of the Saturn V ascent. If this chart (from a NASA space math ...
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Were there any launch vehicles with so heavily pronounced Plume Induced Flow Separation (PIFS), other than Saturn V?

This answer describes a very interesting phenomenon of Plume Induced Flow Separation on Saturn V vehicle. (Apollo-6 S68-29737 photo, courtesy NASA) This is, basically, when "fire" from ...
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Disadvantage of interstage trusses on Soyuz launch vehicle?

Brian Tompsett gave a detailed explanation of the advantages of the trussing in his answer to the question Why do the Russians use these fence-like interstage fairings? The gap between Stage II and ...
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How was the S-IVB stage configured for the post-extraction retrograde dump?

When answering How exactly did the separation between Saturn V stage 3 and the Command / Lunar Module work? I first wrote that the retrograde dump after LM extraction happened "through the engine". ...
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What is known about the trajectory of J002E3 (Saturn V IV-B stage of Apollo 12)?

This answer taught me about J002E3, an object detected in Earth orbit in 2002 that is assumed to be the Saturn V IV-B stage from Apollo 12. It's trajectory through space is fascinating: (source) ...
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What is the fate of SLA fairings jettisoned from lunar mission spacecrafts?

After TLI burn, just before Transposition, Docking and Extraction, the later design crafts jettisoned 4 pieces of the SLA fairing/shroud. These 4 pieces supposedly would follow similar path as the CSM/...
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Did the Saturn V have the status check “go at throttle up”?

I'm familiar with that shuttle status check, "go at throttle up." Did the Saturn V have the same, or similar status check vocalized during the ascent? Did the Saturn V have to throttle down during ...
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Role of ground-supplied helium in S-1C stage

In this answer, the attached quote, says that ground-supplied helium was made to bubble up through LOX lines which mixed it and kept it from boiling and geysering. What exactly this means? By ground ...
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Have any launch systems other than Saturn V used a controlled release?

I was quite surprised to read in this question one very interesting detail about the system used for Saturn V launch release. Saturn V employed a system of pins and dies such that when the hold-down ...
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What is falling off the Saturn V at launch? [duplicate]

At 4:07 in this video you can see that large objects are falling of the outside of the rocket. What are those?
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Iterative Guidance Mode (Saturn V ascent guidance)

I tried to implement the iterative guidance mode algorithm given in the paper "Development of the iterative guidance mode with its application to various vehicles and missions" by D. C. CHANDLER and I....
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Kerosene engine film cooling

So it is clear that kerosene fueled engines use two fluids for film cooling via injection in the combustion chamber, throat, or nozzle. (That is "true film cooling" and not just a fuel rich outer ring ...
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How does the Saturn V Dynamic Test Stand work?

This photo instantly provokes a ton of questions in me: It shows the Dynamic Test Stand at Marshall SFC with the Enterprise, which was a Space Shuttle test vehicle, suspended for vibration testing. ...
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Why is the ring of exhaust gas immediately below the F1 nozzle so dark?

When you look at film of Saturn V launches where you can see the nozzles up close, the exhaust forms a "dark" band immediately below the nozzle extensions. I understand that the F1 engine used film ...
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Did Wernher von Braun really have the “Saturn V painted as the V2”?

A comment below the question Did von Braun have “a thing” for fins? Why did Saturn I block 2 get fins because it's a “von Braun” rocket? suggests that Wernher von Braun had the "Saturn V painted as ...
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Why was ramjet fuel used as hydraulic fluid during Saturn V checkout?

Fuel is also used within the engine as a lubricant and as a hydraulic working fluid, though before launch, RJ-1 ramjet fuel is supplied from the ground, it being more suited for this purpose. ...
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Double redundancy for the Saturn V LVDC computer memory, how were disagreements resolved?

In the Smarter Every Day video How did NASA Steer the Saturn V?- Smarter Every Day 223 Destin is talking with Luke Talley about the memory modules used in the Saturn V LVDC computer. This computer ...
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Was this a rapid SCHEDULED disassembly? How was it done?

The new Curious Droid video Apollo's Forgotten Computer - The LVDC discussed the Saturn V flight computer that's also discussed in answers to Is this really the Saturn V computer only, or are there ...
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How were the pins for Saturn V controlled release tested?

I came across the following section of the Saturn V Flight Manual (pdf): The intriguing part is that they used 12 pins to actually bolt down the Saturn V to the launch pad and the combined engine ...
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Why did Saturn V not head straight to the moon?

This may seem a naive question, but as I understand it one of the reasons for the enormous energy expended by rockets is the extremely high speed (around 28,000kph) you need to achieve a stable orbit ...
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Connection between SM an CM

If the bottom part of the command module (CM) of the Saturn-V was the thermal shield, how was the CM connected with the utilities of the Service Module (SM)?
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Cine footage from Saturn V launches

How did they recover the film showing the separation of the S II stage from the S 1C and the tumbling interstage faring which attached the two stages? The camera which is attached to the S II has a ...
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2answers
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Was all the fuel expended in each stage of a Saturn V launch?

Particularly the first and second stages into earth orbit - were the stages run dry before separation? On first thoughts, It would seem to be safer to do so, but I realised the engines required liquid ...
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1answer
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C-band radar in Saturn instrument unit?

In an answer to the recent question there was this image: What about 8. C-band radar? Is it an active radar unit (rocket to ground) or a radar transponder (ground to rocket) only?
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What are these white cylindrical objects pointed in different directions in this photo of the Saturn V instrument unit?

The BBC News article Apollo in 50 Numbers; The Technology shows an image of the Saturn V's computer along with the caption: The Saturn V's computer was probably the largest computer ever blasted ...
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Is this really the Saturn V computer only, or are there other systems here as well?

The BBC News article Apollo in 50 Numbers; The Technology shows an image of the Saturn V's computer along with the caption: The Saturn V's computer was probably the largest computer ever blasted ...
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1answer
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Why was the Saturn V considered to be human-rated after Apollo 6?

Apollo 6 (AS-502) was the second flight of the Saturn V (the first having been Apollo 4/AS-501, five months earlier), the last flight of a Block I CSM,1 and the last unmanned Apollo mission (if one ...
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Why does the Saturn V have standalone inter-stage rings?

Why are they not integral to the lower stages, e.g. like the Falcon 9? This applies not only to the ring between the first and second stage and also to the shoulder between the second and third stage.
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Human-rating the Saturn V using modern standards

Would a complete Apollo-Saturn stack (like e.g. AS-506) be human-rated according to the latest human-rating process (NPR 8705.2C) of NASA? If not, what are the biggest show-stoppers? This question ...
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Is there a realtime, uncut video of Saturn V ignition through tower clear?

"Hi, I'm Organic Marble and I'm bad at searching Youtube." Inspired by this question What event determined the transfer of control from Kennedy Space Center to Houston?, I'd like to watch a 1:1 (...
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Could the museum Saturn V's be refitted for one more flight?

Even though we will not build new Saturn Vs, there currently exist three Saturn Vs in museums. Could any of these rockets be refitted for flight? If not, what specific component would prevent the ...
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Saturn V and STS holding to launch pad mechanism

In this question on quora, the first answer mentions that for Space Shuttle launches they changed the holding mechanism to explosive bolts from the clamps used to hold the Saturn V. The video links ...
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650 views

Use of different fuels for stages of Saturn V

Why were different fuels used for different stages of Saturn V? I read that the first stage used kerosene (RP-1) and LOX combination, but liquid hydrogen and LOX for the second and third stages. With ...
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What modifications constituted the ‘reorificing’ of F-1 engines on later Saturn V flights?

The topic of uprating the Saturn V’s first stage engines appears to have been widely discussed, and yet there is little agreement as to how it was done. Early Rocketdyne F-1 engines quote lower ...
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How long is the Apollo Lunar Module extraction window?

In Apollo lunar missions, the Command/Service Module extracts the Lunar Module after S-IVB's translunar injection burn. Since all three spacecraft were on a transfer orbit, they would be in the ...
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1answer
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What function did the ribbed portions of the Saturn V exterior serve?

I would like to know what function did the ribbed portions on Saturn V exterior serve, such as the the intertank section and forward skirt on Stage 1. Thank you!