Questions tagged [merlin-1d]
Questions about the SpaceX produced Merlin-1D engine, used by the Falcon rocket.
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What does "pogo bleed" entail?
At around T-3:00 on every Falcon 9 countdown, we hear the following:
Stage 1 pogo bleed verification
I assume they are referring to pogo oscillation, but what exactly does "pogo bleed" ...
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What is the reliability of the Merlin engine?
I know that Merlin is extremely reliable, at least over 99%. I do know of one time when one failed, on Falcon 9's fourth launch. SpaceX had used hundreds, if not thousands, of them. I assume there is ...
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Engine thrust gain with altitude [duplicate]
As you climb at launch, atmospheric pressure falls, causing thrust to rise.
The thrust gain I'm talking about here is due to the increased ratio of nozzle pressure to atmospheric pressure. I'm going ...
user39728
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Can Falcon 9's engines be ignited more than 4 times if there is enough TEA-TEB?
SpaceX's Falcon 9 uses TEA-TEB as a ignitor for its Merlin engines. My question is if the rocket has more TEA-TEB, can the engine be shut down and restarted more than 4 times?
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How hot do rocket engine nozzles get?
What temperatures are encountered by the nozzles of rocket engines like those in SpaceX's Merlin series? Radiative or regenerative cooling, atmosphere or vacuum.
There's plenty of info about exhaust ...
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How much of the Merlin engine is made by 3D printing? [duplicate]
How much of the Merlin engine is made by 3D printing?
Is the nozzle, the valve, the combustion chamber? How about turbo pumps?
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How many parts does a Merlin engine have? And how many of them are made using 3D printing?
Simple question: how many parts is the SpaceX Merlin engine made of?
Individual pieces that can be disassembled and put on a table separately.
And how many of them are made using 3D printing?
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Falcon 9 Merlin 1d thrust calculated through every moment of flight
I am currently trying to recreate the launch of falcon 9 in unity. For the calculations I need the thrust of the first stage (only doing it for one stage for now).
How to calculate it depending on the ...
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Merlin combustion chamber pressure
What is the combustion chamber pressure for Merlin?
I mean the average and the maximum
The Raptor engine was tested with a maximum 330 bar. I would like to compare them
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Is this soot building up on the Falcon 9 interstage?
In the below video of stage separation during Falcon 9's CRS-19 mission, the exhaust of Stage 2's Merlin 1D-Vac impinges on the interstage. It also deposits a black substance on the white paint.
Is ...
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If rocket engines only need fuel and oxidizer, then why there are so many pipe lines on the engines?
If fuel and oxidizer are pumped by turbines to the combustion chamber, then why there are so many pipes around? It should only have a two-cylinder shaped turbine assembly. I doubt there are other ...
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From what material and how are the Merlin engines and nozzles of it (sea level) manufactured?
I am specifically interested in the alloy used to build the engine, also about the nozzle: Is it just in one piece or welded using different sections. If they are welded then which welding techniques ...
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Why are the Falcon 9 Stage-1 engines placed with offsets in the octaweb compartments?
Pictures of the octaweb show that the engines are not placed at the center of each octaweb compartment---they are closer to one side than to the other.
See the picture below for an example. Focus on ...
user36480
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What is the function of this Merlin engine's tube, and why is it getting red hot?
In the video of the recent SpaceX Starlink launch, one view of the Falcon-9 2nd stage engine shows a cane-shaped tube that glows red hot at the "handle" end and seems to get hotter over time....
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Are these two length scales in FH exhaust plumes real, understood, and distinct?
The Ars Technica article We can admit it—we’re dazzled by the controlled fury of the Falcon Heavy includes a beautiful photo of the exhaust plume produced by the 27 engines of a Falcon Heavy launch.
...
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