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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6
votes
1answer
774 views

How does the efficiency of the Rocketdyne F-1A compare to the F-1?

The Rocketdyne F-1 was to be updated with a new turbopump and gas generator assembly, without other major component redesign. This was to result in a thrust increase from around 1,522,000 pounds force ...
7
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0answers
163 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 ...
8
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1answer
537 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 ...
30
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7answers
9k views

Why weren't Saturn V and the Soviet N-1 Moon rockets made larger in order to simplify Lunar missions?

During the Apollo missions the Lunar lander was separated, turned around and docked during flight. And the command module was left in Lunar orbit during the surface mission. The Soviets planned to ...
6
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1answer
420 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!
3
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1answer
342 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 ...
18
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3answers
2k views

S-I, S-II, S-IV; what happened to III?

Stages of the Apollo stack (at least the configuration that landed humans on the Moon) are identified as S-IC, S-II, and S-IVB for the first, second, and third stages. There's no S-III. Why the gap in ...
6
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1answer
321 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 ...
5
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3answers
371 views

Is there a demand for large liquid engines (> 5 MN)?

In other words, why was the F1 rocket engine programme stopped? Is there a sense that solid motors can take care of high thrust cases in a better way? Or is it an unfortunate fallout of the end of the ...
13
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2answers
2k views

How much mass could the Saturn V rockets have landed on the Moon if nothing was coming back?

What dry mass could have soft-landed on the Moon if a Saturn V had been reconfigured to launch a robotic mission going entirely to the surface? Obviously, that wasn't possible at the time, but for a ...
4
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1answer
347 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 ...
25
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2answers
14k views

Were the Saturn V construction plans destroyed?

Over the years, I often heard that we would not be able to build a Saturn V again since its construction plans actually have been destroyed. Then again, I heard that there are copies on microfiche or ...
8
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1answer
566 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 ...
9
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1answer
230 views

Project High Water and the lightning-like radio disturbances it caused

The two Project High Water launches caused the release of 95 tons of water in the ionosphere. For both of these experiments, the resulting ice clouds expanded to several miles in diameter and ...
6
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1answer
972 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 ...
6
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2answers
291 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 ...
18
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4answers
8k 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 ...
2
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1answer
222 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 ...
21
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1answer
7k views

How did they solve Saturn V pogo oscillation problems?

From what I understand, pogo oscillation was already a known problem for Saturn V rocket's first stage (and likely other stages, not sure) long before, say, Apollo 11, especially on its central out of ...
12
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2answers
2k views

Quality vs. Quantity for Rocket Engines

I read a while ago about the famous Soviet N-1, called by some the most powerful rocket (in terms of thrust at liftoff) in history. It used an incredible 30 engines in its first stage. The American ...
7
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1answer
716 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 ...
28
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4answers
7k views

Reasons behind the “Transposition, docking and extraction” maneuver

The Transposition, Docking and Extraction (TD&E) maneuver was done during the Apollo Moon missions right after the translunar injection. The Command/Service Module (CSM) separated from the S-IVB, ...
32
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4answers
8k views

Why was this Saturn rocket elevated for launch?

This is an image of a Saturn on the launch pad on July 20th 1973 It appears to be resting on an elevated platform that raises it significantly off the ground. Why was this done? It seems like a lot ...
10
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1answer
883 views

To what extent did Apollo payload mass drive Saturn capability?

Uwe wrote in an answer that The possible payload of Saturn V was carefully planed for the whole mission, but the difference of the payloads of the missions Apollo 11 and 17 was less than 3000 kg. ...
7
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2answers
755 views

How had the Saturn V lifting capacity changed throughout the Apollo program?

How had the Saturn V lifting capacity changed throughout the Apollo program? The Apollo 11 mission seems to have been very lightly loaded, enjoying only a short time on the surface, single EVA, and no ...
3
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1answer
1k views

Is it possible to estimate the nozzle characteristics of the Rocketdyne HG3 engine?

Boeing and the Marshall Space Flight Centre brought to pass many studies of improved Saturn V launch vehicles. The rockets proposed under the MLV and ELV projects would feature longer stages for more ...
5
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1answer
439 views

Was a large-nozzle variant of the J-2 ever considered?

The J-2 engine used on the upper stages of the Saturn launchers has a specific impulse in vacuum of 421 seconds. This is substantially lower than that of the smaller RL10, 440-460 seconds depending on ...
3
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1answer
324 views

How is the Rocketdyne J-2S area ratio larger than that of the J-2?

The standard J-2 engine measures 3.38 metres in total length, with a nozzle exit diameter of 2.03 metres, to support its 27.5:1 expansion ratio. However, these dimensions are apparently identical for ...
5
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2answers
638 views

When was the second production run of the Saturn V cancelled?

The Saturn V had an initial production run of 15 vehicles (plus 3 test articles). Twelve were used for Apollo 4, 6, and 8-17, one was used for Skylab, the components of the other two are on display in ...
13
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3answers
3k views

Why weren't SRBs used in the design of the Saturn V?

Were solids considered for the Saturn V? If so, why was the idea discarded? I would guess this is due to a number of reasons: Inability to throttle Technology readiness in the era Launch escape
10
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1answer
727 views

What was the maximum thrust of the Rocketdyne F-1 engine?

Reading through several old reports, I have come across studies conducted by MSFC on improved Saturn V designs with greater payload capacity, and with uprated engines. As a result of increasing launch ...
7
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3answers
3k views

Combination of liquid hydrogen and liquid oxygen

For the Apollo missions in the 1960s, NASA used a combination of kerosene and liquid oxygen to get the rockets out of Earth's atmosphere. Why did they do that? If you look at the statistics, the ...
4
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1answer
467 views

How would the Saturn V have differed if the first stage was using liquid methane and LOX?

We have seen here the excellent answer to the question: How would the Saturn V have differed if the first stage was also LH2/LOX? What if liquid methane would be used instead of kerosene? Would the ...
13
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1answer
2k views

How would the Saturn V have differed if the first stage was also LH2/LOX?

Since both Kerosene (RP-1) and liquid hydrogen (LH2) continue to be important liquid fuels used with liquid oxygen (LOX), something can be learned by comparing how they are used. This is covered well ...
26
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2answers
4k views

Saturn V Exhaust Plume

When the Saturn V launch vehicles reached high altitudes and speeds, the exhaust plume looks drastically different compared to how it did at launch (it is much larger, and has a cone about halfway ...
8
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1answer
234 views

Can a crewed capsule land safely if its launch escape tower does not separate?

Apollo, Soyuz and Orion have used, are using or will use launch escape towers. If it is not needed, it must separate during flight. What if it does not separate? I suppose that the spacecraft would ...
12
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2answers
4k views

Why the huge thrust difference between a Sea level and Vacuum J-2 engine?

Looking at the Wikipedia page for the J-2 (one engine was used on the Saturn V third stage, and 5 engines on the second stage) it gets about 232Klbs thrust in vacuum, but at sea level, only 109KLbs ...
5
votes
1answer
569 views

What is a rocket engine “burp”, and why does it happen?

I've seen the term "burp" used, for example, in a description of the Saturn V F-1 engine start sequence (or what is perhaps the source document - see pdf p 62, source page 4-9). What does it mean? ...
4
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2answers
930 views

Would the Saturn V have been able to send more mass to TLI if it had a lower earth parking orbit?

After reading into the topic a little, I've come across a number of increases to the Saturn V's LEO and TLI performance over the course of the Apollo program. Early moon missions sent between 133t and ...
17
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1answer
25k views

Maximum speed reachable by Saturn V

If we launch a Saturn V rocket from space (far away from Earth so that Earth's gravity has no effect on it) then what would be the maximum velocity achievable? How close could it get us to the speed ...
58
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4answers
53k views

Why not build Saturn V's again?

Why is the US developing a new rocket and spacecraft as opposed to building the Saturn V and Apollo stacks again? The SLS / Orion development programs certainly can't cost less than the unit cost of ...
28
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4answers
3k views

What will be NASA's successor to the Saturn V rocket?

The Saturn V rockets were the "tallest, heaviest, and most powerful rocket ever brought to operational status and still holds the record for heaviest payload launched and heaviest payload capacity to ...
5
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2answers
7k views

What is the mist on Saturn V during launch? [duplicate]

There seems to be a consistent mist effect around the Saturn V when launched. It looks like rapidly evaporating water. What is the material? What is the purpose? Did it come from the rocket itself, or ...
13
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2answers
1k views

Did the Apollo F-1 engines gain weight during flight?

I was browsing through Wikipedia when I came across this infographic on the Rocketdyne F-1. It gives the engine dry weight as 18,500 pounds, and the engine burnout weight as 20,180 pounds, meaning the ...
4
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0answers
178 views

Launch altitude and fuel cost [duplicate]

In this question, higher altitude launches are discussed, but no one seems to address fuel consumption. Let's take the Saturn V for example. A Saturn V rocket on the launch pad weighed approximately ...
3
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1answer
4k views

Where does the turbine exhaust go on the Saturn V F1 engine?

Diagrams and descriptions of the F1 engine as used on the Saturn V booster identify a turbine exhaust manifold which leads down from the fuel turbopump and wraps around the main nozzle. As it winds ...
4
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0answers
666 views

If the J-2X is too powerful for SLS, why was it appropriate for Saturn V?

Reading an article about new engines for the SLS (Summary: There is no plan what to do once the current SSME's are expended), they mention that the J-2X is too powerful for the upper stage of SLS. ...
4
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0answers
160 views

Launch roll program for the Saturn five rocket [duplicate]

I have seen many questions answered about the roll program with relation to the shuttle launch and reducing stresses on the launch vehicle and various other reasons, but why was the roll program ...

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