Questions tagged [rockets]
Questions regarding the boosters or thrusters used to propel man-made objects. For rockets firing opposite the primaries, see [retrorockets]. See wiki for other related tags.
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Technical Question on Ignition Back Pressure
I am looking for understanding the backpressure or pressure stabilization of the injector inlet of the engines, during ignition (T-0). Are there books or papers that you suggest to check for ...
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What is the dark brown gas emission seen during the ascent of Starship?
During the video (see below) of Starship IFT-4 there is a lot of brown smoke or gas in the Superheavy exhaust from near the start for almost 30 seconds. Is this NO2? If so roughly how much is produced?...
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How to calculate CO2 emissions from personnel to build a rocket? [closed]
Other than obvious factors in the production of a rocket that cause CO2 emissions (e.g. launch), one of the major environmental contributors is also the personnel involved to build a rocket.
How could ...
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What is the value of air anisotropy?
I am calculating a jet - gas nozzle and to calculate it, I need to know the anisotropy of the air, what is it equal to?
In this formula, the desired value is under the letter ...
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Electricity used by Falcon 9
How much electricity is used in the entire production and launch process of Falcon 9 (launcher, propellant, etc.)? What about other rockets, like the Ariane 5?
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What's the highest ISP that a chemical rocket could achieve without using propellants maintained at cryogenic temperatures?
This is related to my earlier question about capturing an asteroid. If you wanted to place an interceptor rocket in space and the purpose of that rocket is to wait for a long time, and then launch to ...
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Purging and Relighting Kero-LOX engine [closed]
Note: The question is just to gather knowledge on purging. it is in no way intended towards an actual test without safety considerations.
Going for back to back Static Test Fires, would it help to ...
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What's the difference between cryogenic and Liquid propellant?
According to my understanding (which may be incorrect), the cryogenic form and liquid form of propellant both use a fluid as an oxidizer and fuel. Research tells me crygenic propellant is more ...
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Rocket Launch Azimuth Calculation
EDIT 2: I was told immediately when I explained this problem in other places that a closed loop guidance system would be necessary. I knew this was the case from the start and moreso, when I realized ...
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How to implement the TVC missile control method? [closed]
The TVC method allows you to control the flight course of the rocket and return it to an upright position when deflected.
I've seen a lot of videos on YouTube about creating such a system, in ...
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How well does a sea-level engine operating in a vacuum perform compared to a vacuum-optimized engine operating in a vacuum?
A sea-level rocket engine generally has a smaller bell than the equivalent model vacuum-optimized engine - and is perhaps a little bit lighter because of that. I assume that there could be other ...
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What is the maximum number of times a liquid rocket engine has detonated/ exploded during development?
My question comes from a lot of research and curiosity. Do they stop the development process at 10-20 detonations/ explosions? Or do they keep continuining solving one problem after the other. Modern ...
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Are Hybrid Rocket Motors still in use?
There's always an outlook for liquid propellant and solid propellant rocket engines along with detonation engines and so on. But I hear very little about hybrid engines, have they simply been ...
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How have rocket propulsion system designs developed over the years in terms of effectiveness?
I am working on a research project about developing rocket propulsion designs for school. More specifically, I am researching how rocket propulsion designs have changed over the last century, in terms ...
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What is the ratio of air and ethyl alcohol that must be in order to power a rocket engine? [closed]
There is a rocket engine that will run on a fuel pair: air + ethyl alcohol, but what percentage of components should be supplied ...