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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3
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1answer
108 views

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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0answers
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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 engine ...
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70 views

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 ...
5
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1answer
117 views

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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2answers
597 views

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/...
3
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1answer
158 views

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 ...
4
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1answer
79 views

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 ...
7
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1answer
225 views

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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60 views

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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1answer
109 views

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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2answers
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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. ...
8
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1answer
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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 ...
9
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1answer
4k views

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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1answer
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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. ...
13
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1answer
2k views

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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1answer
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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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1answer
403 views

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 ...
45
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7answers
8k views

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 ...
9
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2answers
400 views

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
2k views

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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212 views

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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1answer
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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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3answers
4k views

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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1answer
259 views

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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1answer
820 views

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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3answers
6k views

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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1answer
380 views

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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3answers
497 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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0answers
145 views

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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1answer
404 views

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 ...
6
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1answer
323 views

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!
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2answers
359 views

Why did the ullage motors for the S-IVB TLI burn shut down prior to S-IVB ignition?

I found "Technical Information Summary AS-501: Apollo Saturn V Flight Vehicle" when looking for info about the Saturn V staging sequence. It contains a nice diagram on pages 14-16 showing the various ...
6
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1answer
248 views

What may be the condition of the first stages of Saturn V splashed into ocean after separation?

Two F-1 engines were recovered from a depth of 14,000 feet (4,300 m), about 400 miles (640 km) east of Cape Canaveral after 40 years in the ocean. There is much damage caused by splash down but very ...
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1answer
258 views

When a Saturn V reaches max Q, what fraction of the lengthwise structural load is due to drag rather than acceleration?

Ignoring all other structural loads besides the lengthwise compression of the rocket. This is useful to know when theorizing about whether high altitude launches (e.g. from airplanes) could ...
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1answer
272 views

Vented interstage for the final stage of Saturn V

As we can see in the figure below, the interstage between the escape module and the command module is vented. Why did they go for vented interstage? Wouldn't it increases the serodynamic loadings and ...
8
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1answer
318 views

Apollo-SLA & LM air pressures at launch

At the time of launch what was the air pressure in the Apollo LM, and the spacecraft-LEM adapter section (SLA)? Was the air vented from the SLA as the vehicle entered orbit?
5
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2answers
780 views

How were the propellant pipes on the Saturn V LUT routed to the service arms?

I'm trying to design a model of the Saturn V Launch Umbilical Tower. I can find pictures showing how the propellant piping runs along the service arms, and from pictures showing the pipes running up ...
8
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1answer
370 views

What does “angle of attack 100%” mean in Apollo abort rules?

In Apollo Mission Rules and Saturn V Flight Manuals, I have seen the following abort rules: I understand what most of this means -- if the launch vehicle begins turning at more than 4 degrees per ...
6
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1answer
671 views

Did the Saturn V interstage ring burn up in the atmosphere?

In Saturn V launch footage, the interstage ring falls away shortly after stage I separation, briefly catching fire from the stage II exhaust. Does this ring continue to drop uncontrolled and impact ...
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2answers
270 views

Did the N-1 have future plans, like the Apollo Applications Program?

The Saturn-V booster was only really used for two types of missions. Lunar Skylab (ASTP used a Saturn-1B booster) That is, heavy lift to lunar orbit, and heavy lift with a space craft. There ...
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4answers
6k views

Were all the switches on the Command Module and LM control panels used during a mission?

Given there are so many switches on the control panels, and they each served a specific purpose, was every single switch used during a mission to the moon (with the exception of the abort switch ...
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2answers
7k views

Did the Saturn V rocket have any purely aesthetic features that didn't serve an actual function?

The rocket itself is magnificent, yes, but with so many ins and outs to it, curious if the entire design was solely purpose built, or if there were features specifically for aesthetic purposes.
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1answer
153 views

Identify this 1960's launch site and mission?

These are screen shots from a video of the Assignment Earth episode of Star Trek (TOS). It was filmed in January 1968. I would assume that the image shown on the screen is NASA file footage, and that ...
5
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1answer
445 views

Apollo 6, reason for premature engine shutdown of two engines of second stage of Saturn V?

I found different versions in the English and German Wikipedia articles about the Apollo 6 flight. "Das zweite Triebwerk wurde vom Steuerungssystem fälschlicherweise deaktiviert, weil die ...
6
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1answer
542 views

Saturn launch precautions for clearing tower?

In watching some Saturn rocket launches from the perspective of the camera being on the launch tower, it seems as if there was relatively little distance between the launching rocket and the tower. I ...