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Questions tagged [payload]

Questions regarding equipment or other material to be transported during space exploration.

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4 votes
2 answers
509 views

Crew Dragon: Could launch escape thrust determine payload capacity?

The superdracos in Dragon's launch escape system each produce $\color{black}{\texttt{71.2 kN}}$ (16,000 lbf) of thrust. There are eight superdracos, giving a combined thrust of $\color{black}{\texttt{...
4 votes
1 answer
112 views

Did the ISS CREAM experiment actually get relocated?

A recent update (May 22) to the database for the NASA visualization tool DOUG shows that the CREAM payload has been relocated to the top of the Japanese Experiment Logistics Module - Pressurized ...
4 votes
4 answers
495 views

Could a third stage be added to Starship?

SpaceX has predicted that Starship will be able to lift up to 150 tons to LEO. Could some of the payload that it will carry have a third stage? If so could that save another flight of Starship since ...
8 votes
1 answer
276 views

Why is there no common "docking" interface for express rack payloads?

It seems strange to me that given all of the concerns about living space and color palette aboard ISS, the data/power/cooling ports for different mid-deck locker equivalent (MLE) express rack payloads ...
4 votes
1 answer
261 views

what kind of valves are used in payload fairing for venting?

I wanted to know that there have been a handful of literature that mentions vent openings in the rocket payload fairings. However, none specify the kind of valves used in those fairings? does anyone ...
9 votes
1 answer
6k views

How much payload can Falcon Heavy Reusable lift?

I can only find figures for the Expendable configuration - 63.8 metric tons. The Wikipedia article says The partially reusable Falcon Heavy falls into the heavy-lift range of launch systems, ...
4 votes
1 answer
281 views

What is the significance of a heat flux value of 1135 W/m^2 when jettisoning the payload fairing? [duplicate]

I have seen that many rockets jettison their payload fairing at an altitude where the aerothermal heatflux is leass than or equal to 1135 W/m^2. What is the reason behind considering this particular ...
4 votes
1 answer
139 views

What are the safe structural elements of spacecraft that could be used for on-orbit capture?

I know this depends on the general configuration of a spacecraft, but I am hoping to gain some insights. Assuming you have a servicer spacecraft with an abstracted capture mechanism (i.e., end ...
5 votes
1 answer
295 views

help understanding this complicated structure that will deploy HySIS

This ISRO page for the HysYS spacecraft says: HysIS, the primary satellite of PSLV-C43 mission, weighing about 380 kg, is an earth observation satellite configured around ISRO’s Mini Satellite-2 (...
4 votes
1 answer
192 views

Has Spacex released any reports describing how they are going to secure the payload on Starship?

SpaceX has announced that Starship will be able to lift around 100 to 150 tons of cargo into Leo. When the spacecraft is landing or taking off you don’t want the payload just floating insecurely in a ...
0 votes
1 answer
66 views

Does the payload capacity of an interplanetary launch rocket increase with decreasing fuel mass or with increasing escape velocity?

Does the payload capacity of an interplanetary launch rocket increase with decreasing fuel mass or with increasing escape velocity? I was thinking that the escape velocity has nothing to do with it ...
2 votes
1 answer
106 views

Radio Pollution Payload for CubeSat

I was thinking of a spectrum analyzer as a radio pollution monitoring payload (for a CubeSat) that aims at making a global map of spectrum usage. My question is: Of which spectrum range can a CubeSat ...
1 vote
1 answer
85 views

Dosimeter in a CubeSat

I heard that a dosimeter could be used to detect cosmic ray particles and estimate the radiation dose received by the devices onboard. In this way, one can determine the average amount of ionising ...
4 votes
1 answer
541 views

Inclination vs payload capacity of a rocket

I am learning about Space exploration and I have the following question: When you are launching a rocket into space with maximal inclination, is the payload capacity then the highest? Thanks!
1 vote
1 answer
148 views

Is the critical inclination the same on every planet in the solar system?

I am learning about Space exploration. Is the critical inclination the same on every planet (in the solar system) or does it depend on the planet?
2 votes
1 answer
146 views

How much mass will Artemis landers deliver to the moon?

Is there an estimate of the mass Artemis Landers must be able to deliver to the Lunar surface? I am interested in the total mass - vehicle and payload on arrival - as well as a breakdown of how much ...
1 vote
3 answers
366 views

Why weren't super heavy lift launch vehicles used for deep space missions?

According to this PDF Cassini-HuygensPDF, we would need to launch 70 tons if we wanted to do a Saturn transfer orbit from a low earth orbit. It says that there are no vehicles in NASA’s stable even ...
15 votes
2 answers
2k views

Why are satellites and other payloads always placed at the top of rockets?

In all rockets that launch satellites to orbit, the satellite is always placed at the top. Why are payloads always placed at the top of rockets?
-4 votes
2 answers
175 views

Why do we launch similar payloads on different models of rocket?

Why don’t we just use one launch vehicle to carry different payloads? For example, to launch payloads in the size range of supplies for a Martian base or something made to destroy a Dimorphos size ...
1 vote
1 answer
524 views

Why hasn’t SpaceX sent anything to Mars yet?

SpaceX has the rockets to send some payload to Mars. The Falcon heavy can carry up to 16.8 tons to Mars according to this answer: Why can Falcon Heavy bring 4.2 times as much mass to Mars than F9, but ...
8 votes
1 answer
286 views

Have there been any rockets whose payload fairings consisted of more than two parts?

Most cargo rockets, such as Falcon 9, Delta IV, and many others, incorporate payload fairings to protect payloads from aero forces and heating during ascent. All of these rockets' fairings split in ...
3 votes
1 answer
182 views

3U CubeSat components

as a project for school, we are designing a preliminary conceptual 3U CubeSat design. The mission is to launch in orbit at 1,000 km and Maintain orbit for 1 month. After orbit is maintained for 1 ...
0 votes
1 answer
122 views

Are there payloads that went to orbit without a protective fairing?

Reading about the Ultralight Starshade Structural Design, It seems some solution among others could be an umbrella based concept Since the starshade has to be roughly 100m in diameter, one could ...
6 votes
2 answers
774 views

Where are all those blocks of steel and concrete now?

According to the Wikipedia article about Elon Musk's Tesla Roadster now in Heliocentric orbit: Traditionally, concrete or steel blocks are used as ballast in risky test flights. SpaceX wanted to ...
4 votes
3 answers
1k 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 ...
4 votes
0 answers
91 views

What was South Korea's Nuri's dummy payload and where did it end up?

Wikipedia's Nuri (rocket) explains that it is a South Korean, three-stage all indigenously developed launch vehicle, and says: On 21 October 2021, it had its first flight at 08:00 UTC and it launched ...
3 votes
0 answers
81 views

Info needed on PSLV launch adaptors and configurations

I want to understand how satellites are accommodated in PSLV. I know about few configurations and adaptors that've been used in the past. Is there any document which gives detailed info on Multiple ...
1 vote
1 answer
284 views

How would an SSTO adapt to various payloads?

Yet another kerbal question here. Background: I've built many SSTOs before, mainly small, light-payload or crew delivery ones (either boosted by a rocket or by itself). The reason why I've been shying ...
5 votes
1 answer
678 views

How do I calculate the characteristic energy for a rocket to near rectilinear halo orbit where the Deep Space Gateway is going to orbit the Moon?

How do I calculate the characteristic energy for a rocket to near rectilinear halo orbit (NRHO) where the LOP-G or the Deep Space Gateway is going to be orbiting the Moon? Or if someone already has a ...
17 votes
2 answers
2k views

What is the largest number of identical satellites launched together?

What is the largest number of (essentially) identical satellites launched together? Form factor alone (e.g. 1U, 3U cubesat) is not enough to make satellites identical, they need to be the same design,...
5 votes
1 answer
1k views

what is revisit rate

I want to understand what the revisit rate is. If the payload is required to make the revisit rate of 5 hours. The orbit is LEO (altitude less than 2000 kms). What does this mean? Revisit time - the ...
4 votes
3 answers
344 views

How good is Stratolaunch vs Falcon9 as a first stage?

With the Stratolaunch flying this week I was interested in seeing how good it was compared to a Falcon9. I figured comparing energy contribution would make sense. The stats as best I can find: ...
2 votes
1 answer
123 views

Why wasn't there a 2nd attempt for the Viking-DS (VDS) test payload before the real Viking 1 and 2 were launched?

Per Gunter's Space Page for Viking-DS (VDS): Viking-DS or VDS (Viking Dynamic Simulator) was a vehicle evaluation payload, which was to represent the dynamic properties of the Viking spacecraft. It ...
9 votes
3 answers
12k views

What is Falcon heavy's payload capacity to Trans-Lunar Injection

According to the SpaceX website (http://www.spacex.com/falcon-heavy) the falcon Heavy can carry 16.8 tons to Trans Mars Injection (TMI) and 26.7 tons to Geostationary Transfer Orbit (GTO). How much ...
3 votes
0 answers
79 views

What was the STS mid-deck cargo capacity?

What was the normal cargo capacity of the Shuttle mid-deck, in terms of mass and volume? STS-135 apparently carried more than usual in the mid-deck, how much and how?
5 votes
1 answer
2k views

What are the longest current rocket payload fairings, capable of carrying long space station sections?

Space News' China launches Tianhe space station core module into orbit China successfully launched a 22-metric-ton module April 28, beginning an intense period of missions for constructing the nation’...
119 votes
6 answers
64k views

How much bigger could Earth be, before rockets wouldn't work?

hint: Apparently the Tsiolkovsky rocket equation does not actually say that you can launch a conventional rocket into orbit around an arbitrarily large and massive body. I'm looking for a number ...
5 votes
1 answer
280 views

Interplanetary secondary payload

Have there been any interplanetary secondary payloads? If there were none, are any such payloads planned? I consider two options: launcher rocket's destination is Earth's orbit (LEO etc.), then ...
20 votes
2 answers
8k views

How does a single rocket place multiple satellites into orbit?

Nowadays, many rockets transport more than one satellite in orbit. But how does a single rocket place multiple satellites into their orbits? Do all rockets which place multiple satellites into orbit ...
4 votes
2 answers
841 views

What secondary payloads, if any, are launching on the inaugural flight of Falcon Heavy?

Overshadowed by a silly, yet awesome primary payload — 'a cool colored cool electric sports car playing a cool track' on to a heliocentric orbit, are there other satellites/secondary payload Falcon ...
17 votes
1 answer
345 views

When have secondary payloads damaged the primary payload of a launcher?

Primary payload customers have traditionally been cautious when allowing secondary payloads on the same launcher. For example, a secondary payload is not trusted to have its own chemical propulsion ...
2 votes
1 answer
221 views

Space Shuttle missions for satellite deployment?

Was there any Space Shuttle mission whose primary target were e deploying satellites (space stations do not count).
0 votes
1 answer
204 views

Highest number of distinctly different satellite designs on a single rocket

The current answer to the question Highest number of satellites launched on a single rocket is 104, on ISRO's PSLV-C37. One of the runner-ups is KANOPUS-V-IK with about 73 satellites. The trick is to ...
1 vote
1 answer
144 views

Payload capacity of Electron rocket?

I can only find the Electron capacity for LEO and SSO: 300 and 200 kg And for Venus: 15 kg (which links to here) But what is the capacity for GTO, Moon and Mars? LEO = Low Earht Orbit SSO = Sun-...
16 votes
1 answer
813 views

What would have been the absolute maximum LEO payload of a two-stage Saturn V?

I read about the Skylab 1 mission in which SA-513 was used to lob the Skylab OWS into orbit. One source (http://forum.nasaspaceflight.com/index.php?topic=12519.20) gave some payload masses: Total ...
1 vote
1 answer
88 views

Payload Capacity definition

Does the payload capacity of a rocket include the satellite and the adaptator or is it just the satellite ?
4 votes
2 answers
158 views

Let's say I build an orbit-capable launch vehicle, what tests/certifications would the LV have to acquire to be allowed to launch payloads into orbit?

For the purpose of the question, let's assume said launch vehicle is 100% identical to Electron. What sort of tests/certifications would I have to send the rocket through in order to make it legal to ...
4 votes
4 answers
2k views

Payload capacity of a rocket

Why does a rocket have far more payload capacity when placing an object in LEO compared to when it's placing the object in farther orbits, like on the Moon? If a rocket has sufficient thrust to take ...
24 votes
2 answers
16k views

Is Starman in the Tesla Roadster a real human?

I first need to know if starman is a real human or a robot. If he is a real human, how does he live? How many years can he live in that car?
3 votes
1 answer
375 views

What is the correct rough estimation for the payload to kick-off a sustainable Mars colony?

In this talk, Elon Musk explains our current global capacity required to kick-off a sustainable Mars colony, should be about 1 000 000 tons (including humans). While this is for sure just some rough ...