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Questions tagged [launch]

Questions regarding the takeoff or the liftoff phase of the flight of a rocket and the set of activities required for preparation of the launch vehicle leading to it.

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Need help understanding staging shown in infographic of Titan launch of Hexagon satellites

The NPR News item I Spy, Via Spy Satellite: Melting Himalayan Glaciers discusses use of declassified historical satellite images that include glaciers, and link to the newly published and Open Access ...
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How much did it cost to refurbish the Launch Complex 39 hardware after an Apollo Saturn V launch?

A launch pad used for a rocket of some 30-35 MNewtons of thrust does not come out of it unscathed. It must be refurbished before it can be used again. How much does that cost? As an indication of such ...
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Launch Azimuth for Southeast launches

I've got the formula for launching to space going Northeast as $$\cos(inc) = \cos(lat) \sin(az)$$ and that works great but what if I wanted to go southeast? For example, I know that from a ...
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Precisely when did the Shuttle's roll program occur?

Previous answers state that the Shuttle launch roll program occurred as soon as practical after tower clear and was achieved by SRB thrust vector control. Can we get a more precise answer on the ...
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How many stages needed for a launch ? How to plan a launch

I am looking on how to find out how many stages are needed to reach a certain orbit. I come across equations to compute the height reach by a stage of a certain time. On the other hand I don't find ...
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What is this long black tube snaking up to the capsule payload of the Antares rocket?

Scott Manley's video The Antares Rocket - NASA's Less Famous Ride To The Space Station includes some file footage of Antares rocket launches. There is a long black tube or cable snaking its way up to ...
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Does the Long March-11 increase its thrust after clearing the launch tower?

The NASA Spaceflight article China conducts first Sea Launch mission with Long March 11 launch of seven satellites links to the YouTube video China’s first sea launch: Long March-11 launches from a ...
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Load Relief of a launch vehicle [closed]

What is the exact meaning of load relief during the Ascent phase of a launch vehicle? How does the launch vehicle control is affected by the angle of attack of the vehicle?
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What are the orbital-mechanical advantages of a long (100+ second) sub-orbital coast phase?

This answer to Trajectory to get into orbit says: In most real launches to low Earth orbit, the burn continues from liftoff until orbital insertion, without a coasting phase. Some (like Antares) do ...
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Rocket Launch Simulation Source Code Locations

As you can take from the title, does anyone know where I could find the source code for a working launch simulation type application such as FlightClub for example?
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Why were Spirit and Opportunity separate launches?

In reading this question (Why A=2 and B=1 in the call signs for Spirit and Opportunity?), it prompted me to wonder why Mars probes Spirit and Opportunity were launched separately, even though their ...
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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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From where do apps that listen to “Kennedy Space Center Communications” get their audio feed?

Watching the Everyday Astronaut video The best places to watch a rocket launch in Florida! near the end there are mentions of some "viewer tweets" including one that caught my eye. Download a ...
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Why did the Americans abandon kerosene after F-1 while the Soviets continued to develop it to very high sophistication?

What is the reason behind America's switch to LH2/LOX, and (USSR's) Russia's decision to stay with it and develop it to spectacular technical sophistication such as the Oxygen-rich staged combustion ...
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238 views

How much of a rocket's energy is used to achieve altitude vs horizontal velocity?

Given how it is significantly easier to achieve suborbital spaceflight, I was wondering about how a rocket spends its energy budget. If you magically could launch a rocket from 0 km/s but from an ...
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Could a fairing vacuum protect the payload from acoustic loads?

This is a weirder question, but here it goes: During launch, a payload (let's say a satellite) undergoes intense shaking and acoustic loads. This is known from the launcher parameters and the ...
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Any punishment for the own launch?

Rewatching the Astronaut Farmer movie got me thinking: if I own a land and am capable/rich enough to build a rocket to launch from this land - will I be punished somehow for doing it? (presuming I'm ...
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What was Apollo 13's “Little Jolt” after MECO?

Disclaimer: This is a question about the 1995 film Apollo 13; I know Hollywood should always be taken with a moon-sized grain of salt, so the question should read as both "Is this true" and "What was ...
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Super Capacitor Stages

Could this super capacitor be up scaled to be of use in the lower stages of a rocket? Here is the only information I found online on this? Related: Could rockets ...
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How would 2 spacecraft be launched to be in sync in opposite directions?

How would 1 spacecraft be launched to have a prograde orbit and the another be launched retrograde to have a mirrored orbital path around the sun or otherwise? Would the 2 spacecraft launch together ...
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Details about traveling from EM-L2 to SE-L1

Would the optimal time to launch be when the Moon was on the opposite side of the Earth from the Sun? What direction would be optimal leaving EM-L2, radially away from the moon? Is the last line of ...
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Space-X Canaveral launch question

In the past, I could see space shuttle launches from my front door on the gulf coast of Pinellas County by looking due east on a clear day or night. I have tried to catch Space-X launches a couple ...
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Why SpaceX have the T+0 second in the countdown while the Space Shuttle 'skip' the T+0 second?

Does the space shuttle countdown skip the first second after launch (T+0) and if yes why? You can see this effect in videos like this one: In comparison with an ...
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Can an Ion engine in tow assist in launch? [closed]

This question asks: How large a body could a probe with ion engines land on and launch from? and made me think could an ion engine that is the payload be mounted in a way to assist in the launch?
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Resources for planning and schedule a launch-watching day-trip in Florida?

I know some busy people in Florida who I'd like to encourage to take a break and go watch a launch. They aren't "space people" and won't be keeping up on technical blogs or NASA or industry websites. ...
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Why does Arabsat 6A need a Falcon Heavy to launch

Is it just me or does a falcon heavy seem like a bit of an overkill to launch Arabsat 6A? Falcon Heavy - GEO payload: 26,700 kilograms Arabsat 6A - weight: ~6000 kilograms Wouldn't some other ...
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Can a rocket refuel on Mars from water?

Can a rocket run only on hydrogen and oxygen? Could a rocket, rover, and electrolysis machine be sent to either of Mars' poles to excavate ice to make hydrogen and oxygen to refuel an unmanned rocket? ...
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What is the point in which metal turns white hot during launch or reentry called?

This is a slow motion film of the Sprint missle. There is a point where to skin goes white hot like a light switch. What is that called? What metal gets white hot while keeping its shape?
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Are there “Space Jellyfish” in Florida? Would they be possible?

The Wikipedia article Space Jellyfish shows the image below with the caption: A California space jellyfish from 22 December 2017 I think that when other Q&A here have shown similar space ...
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3answers
264 views

Can more thrust come from launching parallel to water?

Would having the exhaust of a rocket or air breathing engine in an early stage in close proximity to water on a horizontal launch provide more thrust? Could a rocket launch off water horizontally in ...
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Could a rocket launch off water horizontally in stages us using water and air for lift to save fuel? [duplicate]

A term I have heard is the "water was like class". Meaning that the water had 0 waves. Could a rocket be modified to take off a horizontal surface starting slowly increasing throttle on each stage? ...
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Can a flock of birds crash a rocket?

Has there ever been a situation when birds caused damage to a rocket? At what speed would birds be a problem? Could a rocket launch off water horizontally in stages?
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Could escape velocity be achieved in the atmosphere?

When rockets launch for orbit they travel up and the air thins respectively to the speed increasing. How fast can a rocket for travel at sea level before it would fail or the elevation would have to ...
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Break Away Valves for Launch [duplicate]

I forgot to hang up the fuel pump and broke it off and costed around 80 dollars to replace. While there I wandered could this be adapted to a rocket in some way? How much fuel capacity would be saved ...
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What rocket system launch contained the highest amount of propellent potential energy?

In regards to rocket launches, what rocket launch contained the most potential energy (joules/btu/etc.) in its thrust propellant to achieve is basic mission? I'm not as much concerned with ...
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What is the minimal distance of clearance in the direction of flight path for a rocket?

Usually the rocket launch sites are placed on a coast or a place where there's basically no civilian buildings in the direction of flight path. Is there a standard/regulation on the minimal ...
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249 views

What is meant by “a high-energy geostationary orbit”? (SpaceX Arabsat 6A)

The Teslarati article SpaceX’s April 7th Falcon Heavy launch a step toward new commercial markets says: While there is some inherent uncertainty surrounding the (once again) fairly new rocket, ...
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Help me understand what Farside, a ten “stage” rockoon looked like? How was it configured?

@OrganicMarble's answer links to NASA Sounding Rockets, 1958-1968, A Historical Summary and in Appendix A starting on page 79 it lists: Farside: A type of rockoon developed by Aeronutronics ...
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Could a fat rocket be used on Mars?

Since Mars' atmosphere is around 2% the density of Earth's then could a much wider rocket achieve orbit? Could the rocket be in the shape of a capsule or an optimal shape for reentry on Earth?
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What rocket uses the largest percentage of Fuel/Oxidizer before liftoff?

inspired by this question: How much propellant is used up until liftoff? which asks how much propellant (fuel/oxidizer) a typical rocket uses before liftoff. What has been or is the most non-typical ...
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How much propellant is used up until liftoff?

How much of the total propellant mass (fuel+oxidizer) of the first stage/boosters is usually burnt between ignition and liftoff?
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When was the first strap-on booster used in spaceflight?

The first use of the term "strap-on" in Google Ngram viewer is in 1930 and presumably that wasn't about a booster being attached to a rocket for additional thrust at lift-off. When was a strap-on ...
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What kind of “jet engine-like propulsion” does HyperSciences use to accelerate projectiles to sub-orbital altitudes?

The Teslarati article For HyperSciences, geothermal energy builds a path to space describes the use of technology which has been applied to drilling to launching projectiles to sub-orbital altitudes ...
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What happened to International Microspace's $100 million contract?

This might be an obscure one. As I understand it: Diamandis co-founded Microsat Launch Systems, which was renamed International MicroSpace, in 1989. (This is apparently not the Micro-Space of 1977 to ...
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Launching east from a mountain on the equator at midnight during a new moon; ranking of each contribution?

This answer is intriguing and I'm curious if it's correct, and especially which effects are most important. If you want to avoid gravity assists, the most fuel-efficient way out of the Solar System ...
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Are we changing Earth's rotation?

Can rockets launching change Earth's rotation, and can going into orbit do the same?
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What prompted all of those private launch companies to get into the business?

It seems that, somewhere around the turn of the century, a bunch of private companies started gearing up for launching things into space when nobody (at least not private entrepreneurs) seemed very ...
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What light was the Falcon 9 grid fin occulting in todays SpaceX Nusantara Satu Mission live broadcast?

What light was the Falcon 9 grid fin occulting in todays SpaceX Nusantara Satu Mission live broadcast? I backed up the time slider on the YouTube live broadcast and snapped some screen captures, ...
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Why is NASA buying expensive rockets from ULA when SpaceX is offering the same thing for almost half the price?

Source: https://www.teslarati.com/spacex-ula-nasa-launch-contract-win-vastly-overpriced-official-protest/ SpaceX has filed an official protest with the US Government Accountability Office (GAO) ...
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Most recent launch of a nuclear reactor, and current barriers to launching the next one?

This question about Kilopower nuclear reactors got me thinking. Answer(s) to How many nuclear fission reactors have been launched into space? How many are still there? suggest that most nuclear ...