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Questions tagged [plume]

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13
votes
0answers
239 views

Why is the exhaust plume of Falcon 9 upper stage shaped the way it is?

The (single) Merlin 1D vacuum engine's exhaust plume has a symmetric shape, comprising of six distinct "inner" plumes. Why does it have this shape? Is it due to the shape/configuration of fuel ...
14
votes
2answers
428 views

How bright is a rocket launch?

How bright (in Watts, preferably, or lumens) is the plume from a rocket launch (e.g. a SpaceX launch)? Obviously in its direction of travel it isn't particularly bright, but what is its effective ...
7
votes
2answers
193 views

Identity of source of Rocket Plume visible Eastern Australia, north of Scorpio, midnight 28 July 2016?

Visiting friends in the Northern Tablelands of NSW. I went outside and observed a clear diffuse blob to the north of Scorpio. At first I thought, comet, however binoculars revealed a characteristic ...
4
votes
1answer
831 views

What is this additional plume on the Falcon 9, and is it being ignited/corrected for?

I hadn't noticed it before, but after seeing yesterday's recap video of the recent Launch and Landing of the Falcon 9, I'm wondering what the plume visible during ascent is. You can see it clearly ...
4
votes
2answers
7k views

What does the exhaust plume of a rocket look like in vacuum?

There are plenty of photos of rocket tests and launches in atmosphere, and in these the exhaust plume tends to be a long thin flame. Is this true for when rocket engines operate in a vacuum? My guess ...
3
votes
1answer
263 views

Why are the exhaust plumes exiting the nozzles of SpaceShip Two segmented along their length?

Here is a photo of SpaceShip 2's exhaust shortly after ignition during the test flight in January Why do they have that segmented structure, and how does it affect thrust?
6
votes
0answers
157 views

How could a minimal sample return only from the plumes of an ice moon, Ceres or Io be designed?

Would it be feasible and would it make sense to minimalistically design a sample-return-only mission (or class of missions) along these lines: Light weight plume collecting aerogel (like the Stardust ...